尚硅谷java项目＜云尚办公系统＞超详细(一)搭建环境

怼烎@ 2024-04-29 19:07 6阅读 0赞

### **一、项目介绍(资料见文末)** ###

#### **1、介绍** ####

云尚办公系统是一套自动办公系统，系统主要包含：管理端和员工端

管理端包含：权限管理、审批管理、公众号菜单管理

员工端采用微信公众号操作，包含：办公审批、微信授权登录、消息推送等功能

项目服务器端架构：SpringBoot + MyBatisPlus + SpringSecurity + Redis + Activiti+ MySQL

前端架构：vue-admin-template + Node.js + Npm + Vue + ElementUI + Axios

开发工具: IDEA2021 VS code

#### **2、核心技术** ####

<table style=""> 
 <tbody> 
  <tr> 
   <td style="width:738px;vertical-align:top;height:52px;"><p style=""><span style="font-weight:bold;">基础框架：SpringBoot</span></p></td> 
  </tr> 
  <tr> 
   <td style="width:738px;vertical-align:top;height:52px;"><p style="">数据缓存：Redis</p></td> 
  </tr> 
  <tr> 
   <td style="width:738px;vertical-align:top;height:52px;"><p style="">数据库：MySQL</p></td> 
  </tr> 
  <tr> 
   <td style="width:738px;vertical-align:top;height:52px;"><p style="">权限控制：SpringSecurity</p></td> 
  </tr> 
  <tr> 
   <td style="width:738px;vertical-align:top;height:52px;"><p style="">工作流引擎：Activiti</p></td> 
  </tr> 
  <tr> 
   <td style="width:738px;vertical-align:top;height:52px;"><p style="">前端技术：vue-admin-template + Node.js + Npm + Vue + ElementUI + Axios</p></td> 
  </tr> 
  <tr> 
   <td style="width:738px;vertical-align:top;height:52px;"><p style="">微信公众号：公众号菜单 + 微信授权登录 + 消息推送</p></td> 
  </tr> 
 </tbody> 
</table>

#### **3、项目模块** ####

最终服务器端架构模块

guigu-oa-parent：根目录，管理子模块：

common：公共类父模块

common-util：核心工具类

service-util：service模块工具类

spring-security：spring-security业务模块

model：实体类模块

service-oa：系统服务模块

#### **4、数据库(guigu-oa.sql)** ####

数据库从资料文件中获取，导入数据库，Activiti表后续自动导入，数据库表如下：

![33997e7727665916bfb87d05a13040ae.png][]

![cd8d8066ebda1e0664faf839e9fd1700.png][]

#### **5、其他资源** ####

如：实体类、前端项目模板等都在资料文件夹中，实体类直接复制到model模块，后续不做说明。

![3e13c04d69534e3cdcc66baed94ec8c3.png][]

### **二、搭建环境** ###

目前先搭建“云尚办公系统“项目模块。

1.  #### **搭建项目结构** ####

##### 1.1、搭建父工程guigu-oa-parent #####

管理子模块及依赖

GroupId：com.atguigu

ArtifactId：guigu-oa-parent

新建项目(父模块 ) 如图所示:

![5bb6047edb9ee2682e1e4df3c9c76ebb.png][]

删除src目录,用来管理子模块所以不需要src目录

##### 1.2、搭建工具类父模块common #####

工具类父模块

GroupId：com.atguigu

ArtifactId：common

第一步：右键点击“guigu-oa-parent”新建"module" src删除

![bd6c0f73af18b5f7345b74fb5e3fcc52.png][]

##### 1.3、搭建工具类子模块common-util #####

核心工具类

GroupId：com.atguigu

ArtifactId：common-util

**第一步：右键点击“common”新建"common-util"**

第二步:修改路径记得是在父模块common下新建模块common-util

##### 1.4、搭建工具类子模块service-util #####

核心工具类

GroupId：com.atguigu

ArtifactId：service-util

**第一步：右键点击“common”新建"service-util"**

第二步:修改路径记得是在父模块common下新建模块service-util

##### 1.5、搭建工具类模块model #####

核心工具类

GroupId：com.atguigu

ArtifactId：model

**第一步：和common同一级别模块model**

##### 1.6、搭建工具类模块service-oa #####

核心工具类

GroupId：com.atguigu

ArtifactId：service-oa

**第一步：和common同一级别模块service-oa**

##### 项目最终结构如下图: #####

![48ec036825a525d7ae01c5b6c7d5ffde.png][]

#### **2、配置依赖关系** ####

##### 2.1、guigu-oa-parent父模块管理依赖版本 #####

修改guigu-oa-parent模块pom.xml文件

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.3.6.RELEASE</version>
        </parent>
    
        <groupId>com.atguigu</groupId>
        <artifactId>guigu-oa-parent</artifactId>
        <packaging>pom</packaging>
        <version>1.0-SNAPSHOT</version>
    
        <modules>
            <module>common</module>
            <module>model</module>
            <module>service-oa</module>
        </modules>
    
        <properties>
            <java.version>1.8</java.version>
            <mybatis-plus.version>3.4.1</mybatis-plus.version>
            <mysql.version>8.0.30</mysql.version>
            <knife4j.version>3.0.3</knife4j.version>
            <jwt.version>0.9.1</jwt.version>
            <fastjson.version>2.0.21</fastjson.version>
        </properties>
    
        
        <dependencyManagement>
            <dependencies>
                
                <dependency>
                    <groupId>com.baomidou</groupId>
                    <artifactId>mybatis-plus-boot-starter</artifactId>
                    <version>${mybatis-plus.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>${mysql.version}</version>
                </dependency>
                
                <dependency>
                    <groupId>com.github.xiaoymin</groupId>
                    <artifactId>knife4j-spring-boot-starter</artifactId>
                    <version>${knife4j.version}</version>
                </dependency>
                
                
    
                <dependency>
                    <groupId>io.jsonwebtoken</groupId>
                    <artifactId>jjwt</artifactId>
                    <version>${jwt.version}</version>
                </dependency>
                
                
                <dependency>
                    <groupId>com.alibaba</groupId>
                    <artifactId>fastjson</artifactId>
                    <version>${fastjson.version}</version>
                </dependency>
            </dependencies>
        </dependencyManagement>
    
        <build>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.1</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    
    </project>

##### 2.2、common模块 #####

common公共父模块pom.xml文件配置(如果出现报错重新导入依赖)

##### 2.3、common-util模块 #####

##### 2.4、service-util模块 #####

##### 2.5、model模块 #####

从资源文件夹中导入实体类

##### **idea中安装lombok插件:** #####

(1) 因为目前采用idea2021版本，Lombok在2020.2开始不再更新，导致高版本IDEA(2021及之后版本)无法在Plugins中搜索到Lombok插件，需要手动安装，或者也可以不安装插件，在实体类里面手动生成get、set和构造方法

![f00958c3a15fee67d83af5cbdeda67f0.png][]

(2) 如果搜不到上图lombok插件那么使用以下方法:

###### **第一步 到官网下载Lombok插件** ######

[https://plugins.jetbrains.com/plugin/6317-lombok/versions][https_plugins.jetbrains.com_plugin_6317-lombok_versions]

选择最新版本

![1a0058087eeeb1554f78836372080c97.png][]

###### **第二步 修改参数** ######

![9eb8edf2174b9a1a9d9c773551ac9e6f.png][]

修改jar包里面文件内容，可以使用压缩工具打开jar包

![7bb1b5944720a110313e1066c07393d6.png][]

修改当前idea版本

![cd9e682c5c818a749990b1b0e5363f52.png][]

###### **第三步 在设置中安装** ######

**idea的File -> Settings -> Plugins下选中修改参数后的安装包进行安装，安装后重启idea**

![d2483a2c5939ec26a29ba96965ddea93.png][]

![7ffd718fc48ef71f25ebade41cb2f604.png][]

##### 2.6、service-oa模块 #####

### **三、MyBatis-Plus** ###

官网：[https://baomidou.com/][https_baomidou.com]

#### **1、简介** ####

MyBatis-Plus（简称 MP）是一个MyBatis的增强工具，在 MyBatis 的基础上只做增强不做改变，为简化开发、提高效率而生。

#### **2、主要特点** ####

![f8e62d2b80277e4a6b569d8354788860.png][]

*  **无侵入**：只做增强不做改变，引入它不会对现有工程产生影响，如丝般顺滑

*  **强大的 CRUD 操作**：内置通用 Mapper、通用 Service，仅仅通过少量配置即可实现单表大部分 CRUD 操作，更有强大的条件构造器，满足各类使用需求

*  **支持 Lambda 形式调用**：通过 Lambda 表达式，方便的编写各类查询条件，无需再担心字段写错

*  **支持主键自动生成**：支持多达 4 种主键策略（内含分布式唯一 ID 生成器 - Sequence），可自由配置，完美解决主键问题

*  **内置代码生成器**：采用代码或者 Maven 插件可快速生成 Mapper 、 Model 、 Service 、 Controller 层代码，支持模板引擎，更有超多自定义配置等您来使用

*  **内置分页插件**：基于 MyBatis 物理分页，开发者无需关心具体操作，配置好插件之后，写分页等同于普通 List 查询

*  **分页插件支持多种数据库**：支持 MySQL、MariaDB、Oracle、DB2、H2、HSQL、SQLite、Postgre、SQLServer 等多种数据库

#### **3、依赖** ####

<dependency>
        <groupId>com.baomidou</groupId>
        <artifactId>mybatis-plus-boot-starter</artifactId>
        <version>3.4.1</version>
    </dependency>

### **四、**项目配置:**MyBatis-Plus** ###

前面介绍了MyBatis-Plus，当前就以角色管理为例讲解MyBatis-Plus的使用

#### **1、配置文件** ####

配置 MySQL 数据库的相关配置及Mybatis-Plus日志,在service-oa模块中配置

application.yml

spring:
      application:
        name: service-oa   #配置文件所在模块名称
      profiles:
        active: dev   #在开发过程快速切换环境配置，以及如何使一个部署适配各种不同的环境。如果我们的部署包可以不用修改配置文件

![c2c36aab20ca48dcebdbb3bed2d51120.png][]

application-dev.yml

server:
      port: 8800
    mybatis-plus:
      configuration:
        log-impl: org.apache.ibatis.logging.stdout.StdOutImpl    # 查看日志
    spring:
      datasource:
        type: com.zaxxer.hikari.HikariDataSource   # Springboot默认数据源配置HikariDataSource
        driver-class-name: com.mysql.cj.jdbc.Driver
        url: jdbc:mysql://127.0.0.1:3306/guigu-oa?serverTimezone=GMT%2B8&useSSL=false&characterEncoding=utf-8
        username: root
        password: 123

![2af44c355503d36bea246ced43729761.png][]

#### **2、启动类(service-oa模块com.atguigu包下)** ####

在 Spring Boot 启动类中添加 @MapperScan 注解，扫描 Mapper 文件夹：

package com.atguigu;
    
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.ComponentScan;
    
    
    @SpringBootApplication //springboot项目启动类
    @ComponentScan("com.atguigu") //根据定义的扫描路径，把符合扫描规则的类装配到spring容器中
    @MapperScan("com.atguigu.*.mapper") //扫描mapper包
    public class ServiceAuthApplication {
        public static void main(String[] args) {
            SpringApplication.run(ServiceAuthApplication.class, args);
        }
    }

#### **3、实体类(model模块)** ####

前面已引入，mybatis-plus中的实体类注解说明：

实体类注解详细文档：[https://baomidou.com/pages/223848/][https_baomidou.com_pages_223848]

@TableName：表名注解，标识实体类对应的表

@TableId：主键注解，type = IdType.AUTO（数据库 ID 自增）

@TableField：字段注解（非主键）

@TableLogic：逻辑删除

package com.atguigu.model.system;
    
    import com.baomidou.mybatisplus.annotation.TableField;
    import com.baomidou.mybatisplus.annotation.TableName;
    import com.atguigu.model.base.BaseEntity;
    import io.swagger.annotations.ApiModel;
    import io.swagger.annotations.ApiModelProperty;
    import lombok.Data;
    
    
    @Data
    @ApiModel(description = "角色")// 前面API接口
    @TableName("sys_role") //表名注解，标识实体类对应的表
    
    public class SysRole extends BaseEntity {
        
        private static final long serialVersionUID = 1L;
    
        //@NotBlank(message = "角色名称不能为空")
        @ApiModelProperty(value = "角色名称")
        @TableField("role_name")
        private String roleName;
    
        @ApiModelProperty(value = "角色编码")
        @TableField("role_code")
        private String roleCode;
    
        @ApiModelProperty(value = "描述")
        @TableField("description")
        private String description;
    
    }

#### **4.添加Mapper类(**service-oa模块com.atguigu.auth.mapper包下**)** ####

package com.atguigu.auth.mapper;
    
    import com.atguigu.model.system.SysRole;
    import com.baomidou.mybatisplus.core.mapper.BaseMapper;
    import org.springframework.stereotype.Repository;
    
    @Repository //@Repository用于标注数据访问组件，即DAO组件
    public interface SysRoleMapper extends BaseMapper<SysRole> {
    }

##### 4.1mybatis-plus源码接口说明: #####

com.baomidou.mybatisplus.core.mapper.BaseMapper这是Mybatis-Plus提供的默认Mapper接口。

package com.baomidou.mybatisplus.core.mapper;
    
    import com.baomidou.mybatisplus.core.conditions.Wrapper;
    import com.baomidou.mybatisplus.core.metadata.IPage;
    import java.io.Serializable;
    import java.util.Collection;
    import java.util.List;
    import java.util.Map;
    import org.apache.ibatis.annotations.Param;
    
    public interface BaseMapper<T> extends Mapper<T> {
        int insert(T entity);
    
        int deleteById(Serializable id);
    
        int deleteByMap(@Param("cm") Map<String, Object> columnMap);
    
        int delete(@Param("ew") Wrapper<T> queryWrapper);
    
        int deleteBatchIds(@Param("coll") Collection<? extends Serializable> idList);
    
        int updateById(@Param("et") T entity);
    
        int update(@Param("et") T entity, @Param("ew") Wrapper<T> updateWrapper);
    
        T selectById(Serializable id);
    
        List<T> selectBatchIds(@Param("coll") Collection<? extends Serializable> idList);
    
        List<T> selectByMap(@Param("cm") Map<String, Object> columnMap);
    
        T selectOne(@Param("ew") Wrapper<T> queryWrapper);
    
        Integer selectCount(@Param("ew") Wrapper<T> queryWrapper);
    
        List<T> selectList(@Param("ew") Wrapper<T> queryWrapper);
    
        List<Map<String, Object>> selectMaps(@Param("ew") Wrapper<T> queryWrapper);
    
        List<Object> selectObjs(@Param("ew") Wrapper<T> queryWrapper);
    
        <E extends IPage<T>> E selectPage(E page, @Param("ew") Wrapper<T> queryWrapper);
    
        <E extends IPage<Map<String, Object>>> E selectMapsPage(E page, @Param("ew") Wrapper<T> queryWrapper);
    }

#### **5.测试Mapper接口(service-oa模块测试类)** ####

package com.atguigu;
    
    import com.atguigu.auth.mapper.SysRoleMapper;
    import com.atguigu.model.system.SysRole;
    
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.test.context.junit4.SpringRunner;
    
    import java.util.List;
    
    @RunWith(SpringRunner.class)//测试类是需要@RunWith的，作用是告诉java你这个类通过用什么运行环境运行，
    @SpringBootTest
    public class SysRoleMapperTest {
    
        @Autowired
        private SysRoleMapper sysRoleMapper;
    
        @Test
        public void testSelectList() {
            System.out.println(("----- selectAll method test ------"));
            //UserMapper 中的 selectList() 方法的参数为 MP 内置的条件封装器 Wrapper
            //所以不填写就是无任何条件
            List<SysRole> users = sysRoleMapper.selectList(null);
            users.forEach(System.out::println);
        }
    }

##### **注意：** #####

IDEA在sysRoleMapper处报错，因为找不到注入的对象，因为类是动态创建的，但是程序可以正确的执行。

为了避免报错，可以在 mapper 层 的接口上添加 @Repository 或直接使用 @Resource 代替 @Autowired。

运行后控制台输出:

![a9d28ce103b62ba6b784321b4a1de2e7.png][]

#### **6、CRUD测试(service-oa模块下测试类)** ####

##### 6.1、insert添加 #####

###### **6.1.1、示例** ######

@Test
        public void testInsert(){
            SysRole sysRole = new SysRole();
            sysRole.setRoleName("角色管理员");
            sysRole.setRoleCode("role");
            sysRole.setDescription("角色管理员");
    
            int result = sysRoleMapper.insert(sysRole);
            System.out.println(result); //影响的行数
            System.out.println(sysRole); //id自动回填
        }

![19217c0c076c0cc5dfaaed656b45e43d.png][]

###### **6.1.2、主键策略** ######

###### **(1)ID\_WORKER** ######

MyBatis-Plus默认的主键策略是：ID\_WORKER *全局唯一ID*

###### **(2)自增策略** ######

*  要想主键自增需要配置如下主键策略

*  需要在创建数据表的时候设置主键自增

*  实体字段中配置 @TableId(type = IdType.AUTO)

@TableId(type = IdType.AUTO)
    private Long id;

(3)其他主键策略分析: IdType 源码可知

public enum IdType {
         /**
         * 数据库ID自增
         */
        AUTO(0),
        
        /**
         * 该类型为未设置主键类型
         */
        NONE(1),
        
        /**
         * 用户输入ID
         * 该类型可以通过自己注册自动填充插件进行填充
         */    
        INPUT(2),
        
        /**
         * 全局唯一ID
         */    
        ASSIGN_ID(3),
        
        /**
         * 全局唯一ID (UUID)
         */
        ASSIGN_UUID(4),
        
        /** @deprecated */
        @Deprecated
        ID_WORKER(3),
        /** @deprecated */
        @Deprecated
        ID_WORKER_STR(3),
        /** @deprecated */
        @Deprecated
        UUID(4);
        private final int key;
        private IdType(int key) {
            this.key = key;
        }
        public int getKey() {
            return this.key;
        }
    }

##### 6.2、更新 #####

@Test
    public void testUpdateById(){
        SysRole sysRole = new SysRole();
        sysRole.setId(1L);
        sysRole.setRoleName("角色管理员1");
    
        int result = sysRoleMapper.updateById(sysRole);
        System.out.println(result);
    
    }

![492d3d5b0a1d366cc44990f41b96e9f8.png][]

##### 6.3、删除 #####

###### **6.3.1、根据id删除** ######

/**
     * application-dev.yml 加入配置
     * 此为默认值，如果你的默认值和mp默认的一样，则不需要该配置
     * mybatis-plus:
     *   global-config:
     *     db-config:
     *       logic-delete-value: 1
     *       logic-not-delete-value: 0
     */
    @Test
    public void testDeleteById(){
        int result = sysRoleMapper.deleteById(2L);
        System.out.println(result);
    }

![61f1b3318285e2da49740f750472e80b.png][]

删除成功,数据不会被删除,可以从后面表中字段is\_deleted的数字增加

![2a3259a6fdac197bdd7ab0f7ed442d39.png][]

###### **6.3.2、批量删除** ######

@Test
    public void testDeleteBatchIds() {
        int result = sysRoleMapper.deleteBatchIds(Arrays.asList(1, 1));
        System.out.println(result);
    }

![850081b0db70728380ab14e5e2465029.png][]

##### 6.4、MyBatis-Plus条件构造器 #####

![0182386b0f4b01a9189353012c23e9d3.png][]

Wrapper ： 条件构造抽象类，最顶端父类

AbstractWrapper ： 用于查询条件封装，生成 sql 的 where 条件

QueryWrapper ： Entity 对象封装操作类，不是用lambda语法

UpdateWrapper ： Update 条件封装，用于Entity对象更新操作

AbstractLambdaWrapper ： Lambda 语法使用 Wrapper统一处理解析 lambda 获取 column。

LambdaQueryWrapper ：看名称也能明白就是用于Lambda语法使用的查询Wrapper

LambdaUpdateWrapper ： Lambda 更新封装Wrapper

###### **注意：以下条件构造器的方法入参中的 column均表示数据库字段** ######

示例实现如下:

@Test
    public void testSelect1() {
        QueryWrapper<SysRole> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("role_code", "role");
        List<SysRole> users = sysRoleMapper.selectList(queryWrapper);
        System.out.println(users);
    }
    
    @Test
    public void testSelect2() {
        LambdaQueryWrapper<SysRole> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(SysRole::getRoleCode, "role");
        List<SysRole> users = sysRoleMapper.selectList(queryWrapper);
        System.out.println(users);
    }

#### **7、MyBatis-Plus封装service层** ####

##### 7.1、添加service接口 #####

package com.atguigu.auth.service;
    
    
    import com.atguigu.model.system.SysRole;
    import com.baomidou.mybatisplus.extension.service.IService;
    
    import java.util.List;
    
    public interface SysRoleService extends IService<SysRole> {
    
    }

###### 7.1.1com.baomidou.mybatisplus.extension.service.IService这是Mybatis-Plus提供的默认Service接口。 ######

package com.baomidou.mybatisplus.extension.service;
    
    import com.baomidou.mybatisplus.core.conditions.Wrapper;
    import com.baomidou.mybatisplus.core.mapper.BaseMapper;
    import com.baomidou.mybatisplus.core.metadata.IPage;
    import com.baomidou.mybatisplus.core.toolkit.Assert;
    import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
    import com.baomidou.mybatisplus.core.toolkit.Wrappers;
    import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
    import com.baomidou.mybatisplus.extension.conditions.query.QueryChainWrapper;
    import com.baomidou.mybatisplus.extension.conditions.update.LambdaUpdateChainWrapper;
    import com.baomidou.mybatisplus.extension.conditions.update.UpdateChainWrapper;
    import com.baomidou.mybatisplus.extension.kotlin.KtQueryChainWrapper;
    import com.baomidou.mybatisplus.extension.kotlin.KtUpdateChainWrapper;
    import com.baomidou.mybatisplus.extension.toolkit.ChainWrappers;
    import com.baomidou.mybatisplus.extension.toolkit.SqlHelper;
    import java.io.Serializable;
    import java.util.Collection;
    import java.util.List;
    import java.util.Map;
    import java.util.Objects;
    import java.util.function.Function;
    import java.util.stream.Collectors;
    import org.springframework.transaction.annotation.Transactional;
    
    public interface IService<T> {
        int DEFAULT_BATCH_SIZE = 1000;
    
        default boolean save(T entity) {
            return SqlHelper.retBool(this.getBaseMapper().insert(entity));
        }
    
        @Transactional(
            rollbackFor = {Exception.class}
        )
        default boolean saveBatch(Collection<T> entityList) {
            return this.saveBatch(entityList, 1000);
        }
    
        boolean saveBatch(Collection<T> entityList, int batchSize);
    
        @Transactional(
            rollbackFor = {Exception.class}
        )
        default boolean saveOrUpdateBatch(Collection<T> entityList) {
            return this.saveOrUpdateBatch(entityList, 1000);
        }
    
        boolean saveOrUpdateBatch(Collection<T> entityList, int batchSize);
    
        default boolean removeById(Serializable id) {
            return SqlHelper.retBool(this.getBaseMapper().deleteById(id));
        }
    
        default boolean removeByMap(Map<String, Object> columnMap) {
            Assert.notEmpty(columnMap, "error: columnMap must not be empty", new Object[0]);
            return SqlHelper.retBool(this.getBaseMapper().deleteByMap(columnMap));
        }
    
        default boolean remove(Wrapper<T> queryWrapper) {
            return SqlHelper.retBool(this.getBaseMapper().delete(queryWrapper));
        }
    
        default boolean removeByIds(Collection<? extends Serializable> idList) {
            return CollectionUtils.isEmpty(idList) ? false : SqlHelper.retBool(this.getBaseMapper().deleteBatchIds(idList));
        }
    
        default boolean updateById(T entity) {
            return SqlHelper.retBool(this.getBaseMapper().updateById(entity));
        }
    
        default boolean update(Wrapper<T> updateWrapper) {
            return this.update((Object)null, updateWrapper);
        }
    
        default boolean update(T entity, Wrapper<T> updateWrapper) {
            return SqlHelper.retBool(this.getBaseMapper().update(entity, updateWrapper));
        }
    
        @Transactional(
            rollbackFor = {Exception.class}
        )
        default boolean updateBatchById(Collection<T> entityList) {
            return this.updateBatchById(entityList, 1000);
        }
    
        boolean updateBatchById(Collection<T> entityList, int batchSize);
    
        boolean saveOrUpdate(T entity);
    
        default T getById(Serializable id) {
            return this.getBaseMapper().selectById(id);
        }
    
        default List<T> listByIds(Collection<? extends Serializable> idList) {
            return this.getBaseMapper().selectBatchIds(idList);
        }
    
        default List<T> listByMap(Map<String, Object> columnMap) {
            return this.getBaseMapper().selectByMap(columnMap);
        }
    
        default T getOne(Wrapper<T> queryWrapper) {
            return this.getOne(queryWrapper, true);
        }
    
        T getOne(Wrapper<T> queryWrapper, boolean throwEx);
    
        Map<String, Object> getMap(Wrapper<T> queryWrapper);
    
        <V> V getObj(Wrapper<T> queryWrapper, Function<? super Object, V> mapper);
    
        default int count() {
            return this.count(Wrappers.emptyWrapper());
        }
    
        default int count(Wrapper<T> queryWrapper) {
            return SqlHelper.retCount(this.getBaseMapper().selectCount(queryWrapper));
        }
    
        default List<T> list(Wrapper<T> queryWrapper) {
            return this.getBaseMapper().selectList(queryWrapper);
        }
    
        default List<T> list() {
            return this.list(Wrappers.emptyWrapper());
        }
    
        default <E extends IPage<T>> E page(E page, Wrapper<T> queryWrapper) {
            return this.getBaseMapper().selectPage(page, queryWrapper);
        }
    
        default <E extends IPage<T>> E page(E page) {
            return this.page(page, Wrappers.emptyWrapper());
        }
    
        default List<Map<String, Object>> listMaps(Wrapper<T> queryWrapper) {
            return this.getBaseMapper().selectMaps(queryWrapper);
        }
    
        default List<Map<String, Object>> listMaps() {
            return this.listMaps(Wrappers.emptyWrapper());
        }
    
        default List<Object> listObjs() {
            return this.listObjs(Function.identity());
        }
    
        default <V> List<V> listObjs(Function<? super Object, V> mapper) {
            return this.listObjs(Wrappers.emptyWrapper(), mapper);
        }
    
        default List<Object> listObjs(Wrapper<T> queryWrapper) {
            return this.listObjs(queryWrapper, Function.identity());
        }
    
        default <V> List<V> listObjs(Wrapper<T> queryWrapper, Function<? super Object, V> mapper) {
            return (List)this.getBaseMapper().selectObjs(queryWrapper).stream().filter(Objects::nonNull).map(mapper).collect(Collectors.toList());
        }
    
        default <E extends IPage<Map<String, Object>>> E pageMaps(E page, Wrapper<T> queryWrapper) {
            return this.getBaseMapper().selectMapsPage(page, queryWrapper);
        }
    
        default <E extends IPage<Map<String, Object>>> E pageMaps(E page) {
            return this.pageMaps(page, Wrappers.emptyWrapper());
        }
    
        BaseMapper<T> getBaseMapper();
    
        Class<T> getEntityClass();
    
        default QueryChainWrapper<T> query() {
            return ChainWrappers.queryChain(this.getBaseMapper());
        }
    
        default LambdaQueryChainWrapper<T> lambdaQuery() {
            return ChainWrappers.lambdaQueryChain(this.getBaseMapper());
        }
    
        default KtQueryChainWrapper<T> ktQuery() {
            return ChainWrappers.ktQueryChain(this.getBaseMapper(), this.getEntityClass());
        }
    
        default KtUpdateChainWrapper<T> ktUpdate() {
            return ChainWrappers.ktUpdateChain(this.getBaseMapper(), this.getEntityClass());
        }
    
        default UpdateChainWrapper<T> update() {
            return ChainWrappers.updateChain(this.getBaseMapper());
        }
    
        default LambdaUpdateChainWrapper<T> lambdaUpdate() {
            return ChainWrappers.lambdaUpdateChain(this.getBaseMapper());
        }
    
        default boolean saveOrUpdate(T entity, Wrapper<T> updateWrapper) {
            return this.update(entity, updateWrapper) || this.saveOrUpdate(entity);
        }
    }

##### 7.2、添加service接口实现 #####

package com.atguigu.auth.service.impl;
    
    import com.atguigu.auth.mapper.SysRoleMapper;
    import com.atguigu.auth.service.SysRoleService;
    
    import com.atguigu.model.system.SysRole;
    import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
    import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
    import org.springframework.beans.factory.annotation.Autowired;
    
    import java.util.List;
    @Service
    public class SysRoleServiceImpl extends ServiceImpl<SysRoleMapper, SysRole> implements SysRoleService {
    
        @Autowired
        private SysRoleMapper sysRoleMapper;
    }

##### 7.3、测试Service接口 #####

新建一个SysRoleServiceTest代码如下:

package com.atguigu;
    
    import com.atguigu.auth.service.SysRoleService;
    import com.atguigu.model.system.SysRole;
    
    import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
    import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.boot.test.context.SpringBootTest;
    import org.springframework.test.context.junit4.SpringRunner;
    
    import java.util.List;
    
    @RunWith(SpringRunner.class)
    @SpringBootTest
    public class SysRoleServiceTest {
    
        @Autowired
        private SysRoleService sysRoleService;
    
        @Test
        public void testSelectList() {
            System.out.println(("----- selectAll method test ------"));
            //UserMapper 中的 selectList() 方法的参数为 MP 内置的条件封装器 Wrapper
            //所以不填写就是无任何条件
            List<SysRole> users = sysRoleService.list();
            users.forEach(System.out::println);
        }
    
        @Test
        public void testInsert(){
            SysRole sysRole = new SysRole();
            sysRole.setRoleName("角色管理员");
            sysRole.setRoleCode("role");
            sysRole.setDescription("角色管理员");
    
            boolean result = sysRoleService.save(sysRole);
            System.out.println(result); //影响的行数
            System.out.println(sysRole); //id自动回填
        }
    
        @Test
        public void testUpdateById(){
            SysRole sysRole = new SysRole();
            sysRole.setId(1L);
            sysRole.setRoleName("角色管理员1");
    
            boolean result = sysRoleService.updateById(sysRole);
            System.out.println(result);
    
        }
    
        @Test
        public void testDeleteById(){
            boolean result = sysRoleService.removeById(2L);
            System.out.println(result);
        }
    
        @Test
        public void testSelect1() {
            QueryWrapper<SysRole> queryWrapper = new QueryWrapper<>();
            queryWrapper.ge("role_code", "role");
            List<SysRole> users = sysRoleService.list(queryWrapper);
            System.out.println(users);
        }
    
        @Test
        public void testSelect2() {
            LambdaQueryWrapper<SysRole> queryWrapper = new LambdaQueryWrapper<>();
            queryWrapper.ge(SysRole::getRoleCode, "role");
            List<SysRole> users = sysRoleService.list(queryWrapper);
            System.out.println(users);
        }
    }

### **五、角色管理** ###

#### **1、测试controller层(service-oa模块下)** ####

##### 1.1、添加Controller(Role) #####

package com.atguigu.auth.controller;
    
    import com.atguigu.auth.service.SysRoleService;
    
    import com.atguigu.model.system.SysRole;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.List;
    
    @RestController
    @RequestMapping("/admin/system/sysRole")
    public class SysRoleController {
    
        @Autowired
        private SysRoleService sysRoleService;
    
        @GetMapping("findAll") //查询全部
        public List<SysRole> findAll() {
            List<SysRole> roleList = sysRoleService.list();
            return roleList;
        }
        
    }

##### 1.2、测试Controller接口 #####

运行springboot启动类,输入下列路径测试:

[http://localhost:8800/admin/system/sysRole/findAll][http_localhost_8800_admin_system_sysRole_findAll]

![9e55a10b06089b5850de22c1720a1dec.png][]

#### **2、定义统一返回结果对象** ####

项目中我们会将响应封装成json返回，一般我们会将所有接口的数据格式统一， 使前端(iOS Android, Web)对数据的操作更一致、轻松。

一般情况下，统一返回数据格式没有固定的格式，只要能描述清楚返回的数据状态以及要返回的具体数据就可以。但是一般会包含状态码、返回消息、数据这几部分内容

例如，我们的系统要求返回的基本数据格式如下：

**列表：**

{
      "code": 200,
      "message": "成功",  
    "data": [    
    { 
         "id": 2,      "roleName": "系统管理员"    
    }  
    ], 
     "ok": true
    }

**分页：**

{
      "code": 200,
      "message": "成功",
      "data": {
        "records": [
          {
            "id": 2,
            "roleName": "系统管理员"
          },
          {
            "id": 3,
            "name": "普通管理员"
          }
        ],
        "total": 10,
        "size": 3,
        "current": 1,
        "orders": [],
        "hitCount": false,
        "searchCount": true,
        "pages": 2
      },
      "ok": true
    }

**没有返回数据：**

{
      "code": 200,
      "message": "成功",
      "data": null,
      "ok": true
    }

**失败：**

{
      "code": 201,
      "message": "失败",
      "data": null,
      "ok": false
    }

##### 2.1、定义统一返回结果对象 #####

操作模块：common-util

后续其他模块也会用到，故抽取到common-util模块

![9f53537f126669fe8da2da5d3c2ed5e4.png][]

Result类,代码如下: 报错先不急.先往下看

package com.atguigu.common.result;
    
    
    import lombok.Data;
    
    /**
     * 全局统一返回结果类
     *
     */
    @Data
    public class Result<T> {
    
        //返回码
        private Integer code;
    
        //返回消息
        private String message;
    
        //返回数据
        private T data;
    
        public Result(){}
    
        // 返回数据
        protected static <T> Result<T> build(T data) {
            Result<T> result = new Result<T>();
            if (data != null)
                result.setData(data);
            return result;
        }
    
        public static <T> Result<T> build(T body, Integer code, String message) {
            Result<T> result = build(body);
            result.setCode(code);
            result.setMessage(message);
            return result;
        }
    
        public static <T> Result<T> build(T body, ResultCodeEnum resultCodeEnum) {
            Result<T> result = build(body);
            result.setCode(resultCodeEnum.getCode());
            result.setMessage(resultCodeEnum.getMessage());
            return result;
        }
    
        public static<T> Result<T> ok(){
            return Result.ok(null);
        }
    
        /**
         * 操作成功
         * @param data  baseCategory1List
         * @param <T>
         * @return
         */
        public static<T> Result<T> ok(T data){
            Result<T> result = build(data);
            return build(data, ResultCodeEnum.SUCCESS);
        }
    
        public static<T> Result<T> fail(){
            return Result.fail(null);
        }
    
        /**
         * 操作失败
         * @param data
         * @param <T>
         * @return
         */
        public static<T> Result<T> fail(T data){
            Result<T> result = build(data);
            return build(data, ResultCodeEnum.FAIL);
        }
    
        public Result<T> message(String msg){
            this.setMessage(msg);
            return this;
        }
    
        public Result<T> code(Integer code){
            this.setCode(code);
            return this;
        }
    }

统一返回结果状态信息类:

下面的状态后续都会用到，所以直接引入了

ResultCodeEnum类,代码如下:

package com.atguigu.common.result;
    
    import lombok.Getter;
    
    /**
     * 统一返回结果状态信息类
     *
     */
    @Getter
    public enum ResultCodeEnum {
    
        SUCCESS(200,"成功"),
        FAIL(201, "失败"),
        SERVICE_ERROR(2012, "服务异常"),
        DATA_ERROR(204, "数据异常"),
    
        LOGIN_AUTH(208, "未登陆"),
        PERMISSION(209, "没有权限")
        ;
    
        private Integer code;
    
        private String message;
    
        private ResultCodeEnum(Integer code, String message) {
            this.code = code;
            this.message = message;
        }
    }

##### 2.2、改造controller方法 #####

@GetMapping("findAll")
    public Result<List<SysRole>> findAll() {
        List<SysRole> roleList = sysRoleService.list();
        return Result.ok(roleList);
    }

##### 2.3、测试接口 #####

[http://localhost:8800/admin/system/sysRole/findAll][http_localhost_8800_admin_system_sysRole_findAll]

![1cb31019b80ef9a264d9ad7e1c0701ad.png][]

![441c78f8785056380f42039a888ff24e.png][]

#### **3、knife4j** ####

文档地址：[https://doc.xiaominfo.com/][https_doc.xiaominfo.com]

knife4j是为Java MVC框架集成Swagger生成Api文档的增强解决方案。

##### 3.1、Swagger介绍 #####

前后端分离开发模式中，api文档是最好的沟通方式。

Swagger 是一个规范和完整的框架，用于生成、描述、调用和可视化 RESTful 风格的 Web 服务。

1、及时性 (接口变更后，能够及时准确地通知相关前后端开发人员)

2、规范性 (并且保证接口的规范性，如接口的地址，请求方式，参数及响应格式和错误信息)

3、一致性 (接口信息一致，不会出现因开发人员拿到的文档版本不一致，而出现分歧)

4、可测性 (直接在接口文档上进行测试，以方便理解业务)

##### 3.2、集成knife4j #####

knife4j属于service模块公共资源，因此我们集成到service-uitl模块

###### **3.2.1 添加依赖** ######

操作模块：service-uitl导入依赖:

<dependency>
        <groupId>com.github.xiaoymin</groupId>
        <artifactId>knife4j-spring-boot-starter</artifactId>
    </dependency>

###### **3.2.2 添加knife4j配置类(com.atguigu.common.config.knife4j包下)** ######

操作模块：service-uitl

package com.atguigu.common.config.knife4j;
    
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import springfox.documentation.builders.ApiInfoBuilder;
    import springfox.documentation.builders.ParameterBuilder;
    import springfox.documentation.builders.PathSelectors;
    import springfox.documentation.builders.RequestHandlerSelectors;
    import springfox.documentation.schema.ModelRef;
    import springfox.documentation.service.ApiInfo;
    import springfox.documentation.service.Contact;
    import springfox.documentation.service.Parameter;
    import springfox.documentation.spi.DocumentationType;
    import springfox.documentation.spring.web.plugins.Docket;
    import springfox.documentation.swagger2.annotations.EnableSwagger2WebMvc;
    
    import java.util.ArrayList;
    import java.util.List;
    
    /**
     * knife4j配置信息
     */
    @Configuration
    @EnableSwagger2WebMvc
    public class Knife4jConfig {
    
        @Bean
        public Docket adminApiConfig(){
            List<Parameter> pars = new ArrayList<>();
            ParameterBuilder tokenPar = new ParameterBuilder();
            tokenPar.name("zhousir")
                    .description("用户zhousir")
                    .defaultValue("")
                    .modelRef(new ModelRef("string"))
                    .parameterType("header")
                    .required(false)
                    .build();
            pars.add(tokenPar.build());
            //添加head参数end
    
            Docket adminApi = new Docket(DocumentationType.SWAGGER_2)
                    .groupName("adminApi")
                    .apiInfo(adminApiInfo())
                    .select()
                    //只显示admin路径下的页面
                    .apis(RequestHandlerSelectors.basePackage("com.atguigu"))
                    .paths(PathSelectors.regex("/admin/.*"))
                    .build()
                    .globalOperationParameters(pars);
            return adminApi;
        }
    
        private ApiInfo adminApiInfo(){
    
            return new ApiInfoBuilder()
                    .title("云尚办公后台管理系统-API文档")
                    .description("本文档描述了后台管理系统微服务接口定义")
                    .version("1.0")
                    .contact(new Contact("atguigu", "http://atguigu.com", "atguigu@qq.com"))
                    .build();
        }
    
    
    }

###### **3.2.3 Controller层添加注解** ######

package com.atguigu.system.controller;
    
    
    import com.atguigu.auth.service.SysRoleService;
    import com.atguigu.common.result.Result;
    import com.atguigu.model.system.SysRole;
    import io.swagger.annotations.Api;
    import io.swagger.annotations.ApiOperation;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.List;
    
    @Api(tags = "角色管理") //Api访问名称
    @RestController
    @RequestMapping("/admin/system/sysRole")
    public class SysRoleController {
    
        @Autowired
        private SysRoleService sysRoleService;
    
        @ApiOperation(value = "获取全部角色列表")//接口的访问地址名称
        @GetMapping("findAll")
        public Result<List<SysRole>> findAll() {
            List<SysRole> roleList = sysRoleService.list();
            return Result.ok(roleList);
        }
    }

###### **3.2.4、接口文档测试** ######

[http://localhost:8800/doc.html][http_localhost_8800_doc.html]

![bc31d6d35d50ccac47b7410ae29a3868.png][]

#### **4、分页查询** ####

##### 4.1、配置分页插件 #####

操作模块：service-uitl (**com.atguigu.common.config**)新建包mp下创建类

说明：我们将@MapperScan("com.atguigu.auth.mapper")提取到该配置类上面，统一管理，启动类就不需要了。

package com.atguigu.common.config.mp;
    
    import com.baomidou.mybatisplus.annotation.DbType;
    import com.baomidou.mybatisplus.autoconfigure.ConfigurationCustomizer;
    import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
    import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    @Configuration// 配置文件注解
    @MapperScan("com.atguigu.auth.mapper")
    public class MybatisPlusConfig {
    
        /**
         * 新的分页插件,一缓和二缓遵循mybatis的规则,需要设置 MybatisConfiguration#useDeprecatedExecutor = false 
    避免缓存出现问题(该属性会在旧插件移除后一同移除)
         */
        @Bean
        public MybatisPlusInterceptor mybatisPlusInterceptor() {
            MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
            interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
            return interceptor;
        }
    
        @Bean
        public ConfigurationCustomizer configurationCustomizer() {
            return configuration -> configuration.setUseDeprecatedExecutor(false);
        }
    }

##### 4.2实现分页controller层(service-oa模块下com.atguigu.auth.controller.SysRoleController) #####

package com.atguigu.auth.controller;
    
    
    import com.atguigu.auth.service.SysRoleService;
    import com.atguigu.common.result.Result;
    import com.atguigu.model.system.SysRole;
    import com.atguigu.vo.system.SysRoleQueryVo;
    import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
    import com.baomidou.mybatisplus.core.metadata.IPage;
    import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
    import io.swagger.annotations.Api;
    import io.swagger.annotations.ApiOperation;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.util.StringUtils;
    import org.springframework.web.bind.annotation.GetMapping;
    import org.springframework.web.bind.annotation.PathVariable;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.util.List;
    
    @Api(tags = "角色管理") //Api访问名称
    @RestController
    @RequestMapping("/admin/system/sysRole")
    public class SysRoleController {
    
        @Autowired
        private SysRoleService sysRoleService;
    
        @ApiOperation(value = "获取全部角色列表")//接口的访问地址名称
        @GetMapping("findAll")
        public Result<List<SysRole>> findAll() {
            List<SysRole> roleList = sysRoleService.list();
            return Result.ok(roleList);
        }
    
    
        //条件分页查询
    //page 当前页  limit 每页显示记录数
    //SysRoleQueryVo 条件对象
        @ApiOperation("条件分页查询")
        @GetMapping("{page}/{limit}")
        public Result pageQueryRole(@PathVariable Long page,
                                    @PathVariable Long limit,
                                    SysRoleQueryVo sysRoleQueryVo) {
            //调用service的方法实现
            //1 创建Page对象，传递分页相关参数
            //page 当前页  limit 每页显示记录数
            Page<SysRole> pageParam = new Page<>(page,limit);
    
            //2 封装条件，判断条件是否为空，不为空进行封装
            LambdaQueryWrapper<SysRole> wrapper = new LambdaQueryWrapper<>();
            String roleName = sysRoleQueryVo.getRoleName();
            if(!StringUtils.isEmpty(roleName)) {
                //封装 like模糊查询
                wrapper.like(SysRole::getRoleName,roleName);
            }
    
            //3 调用方法实现
            IPage<SysRole> pageModel = sysRoleService.page(pageParam, wrapper);
            return Result.ok(pageModel);
        }
    }

#### **5、其他controller方法(增删改查)** ####

说明：通过knife4j测试接口

@ApiOperation(value = "获取")
    @GetMapping("get/{id}")
    public Result get(@PathVariable Long id) {
        SysRole role = sysRoleService.getById(id);
        return Result.ok(role);
    }
    
    @ApiOperation(value = "新增角色")
    @PostMapping("save")
    public Result save(@RequestBody @Validated SysRole role) {
        sysRoleService.save(role);
        return Result.ok();
    }
    
    @ApiOperation(value = "修改角色")
    @PutMapping("update")
    public Result updateById(@RequestBody SysRole role) {
        sysRoleService.updateById(role);
        return Result.ok();
    }
    
    @ApiOperation(value = "删除角色")
    @DeleteMapping("remove/{id}")
    public Result remove(@PathVariable Long id) {
        sysRoleService.removeById(id);
        return Result.ok();
    }
    
    @ApiOperation(value = "根据id列表删除")
    @DeleteMapping("batchRemove")
    public Result batchRemove(@RequestBody List<Long> idList) {
        sysRoleService.removeByIds(idList);
        return Result.ok();
    }

**配置日期时间格式**

application-dev.yml添加以下内容

jackson:
        date-format: yyyy-MM-dd HH:mm:ss
        time-zone: GMT+8

#### **6、统一异常处理** ####

##### 6.1、制造异常 #####

**除以0**

int a = 10/0;

![3f772138a54f20aec880c53330d4f6df.png][]

我们想让异常结果也显示为统一的返回结果对象，并且统一处理系统的异常信息，那么需要统一异常处理。

##### 6.2、全局异常处理 #####

###### **6.2.1、创建统一异常处理器** ######

操作模块：service-util

package com.atguigu.common.config.exception;
    
    import com.atguigu.common.result.Result;
    import org.springframework.web.bind.annotation.ControllerAdvice;
    import org.springframework.web.bind.annotation.ExceptionHandler;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    
    /**
     * 全局异常处理类
     *
     */
    @ControllerAdvice
    public class GlobalExceptionHandler {
    
        @ExceptionHandler(Exception.class)
        @ResponseBody
        public Result error(Exception e){
            e.printStackTrace();
            return Result.fail();
        }
    }

###### **6.2.2进行测试** ######

##### 6.3、处理特定异常 #####

###### **6.3.1、添加异常处理方法**  ######

操作模块：service-util com.atguigu.config.exception

**GlobalExceptionHandler.java中添加以下代码:**

@ExceptionHandler(ArithmeticException.class)
    @ResponseBody
    public Result error(ArithmeticException e){
        e.printStackTrace();
        return Result.fail().message("执行了特定异常处理");
    }

##### 6.4、处理自定义异常 #####

操作模块：service-util com.atguigu.config.exception

###### **6.4.1、创建自定义异常类** ######

package com.atguigu.common.config.exception;
    
    import com.atguigu.common.result.ResultCodeEnum;
    import lombok.Data;
    
    /**
     * 自定义全局异常类
     *
     */
    
    @Data
    public class GuiguException extends RuntimeException {
    
        private Integer code;//状态码
        private String msg;//描述信息
    
        public GuiguException(Integer code,String msg) {
            super(msg);
            this.code = code;
            this.msg = msg;
        }
    
        /**
         * 接收枚举类型对象
         * @param resultCodeEnum
         */
        public GuiguException(ResultCodeEnum resultCodeEnum) {
            super(resultCodeEnum.getMessage());
            this.code = resultCodeEnum.getCode();
            this.msg = resultCodeEnum.getMessage();
        }
    
        @Override
        public String toString() {
            return "GuliException{" +
                    "code=" + code +
                    ", message=" + this.getMessage() +
                    '}';
        }
    }

###### **6.4.2、业务中需要位置抛出** ######

try {
        int a = 10/0;
    }catch(Exception e) {
        throw new GuiguException(20001,"出现自定义异常");
    }

###### **6.4.3、添加异常处理方法** ######

**GlobalExceptionHandler.java中添加**

@ExceptionHandler(GuiguException.class)
    @ResponseBody
    public Result error(GuiguException e){
        e.printStackTrace();
        return Result.fail().message(e.getMsg()).code(e.getCode());
    }

###### **6.4.4、测试**  ######

[33997e7727665916bfb87d05a13040ae.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/e3d5162f7a4844de9a7e35e6eb601c7f.png
[cd8d8066ebda1e0664faf839e9fd1700.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/a1691a1284fd40a9bfd4b7c269bb20bc.png
[3e13c04d69534e3cdcc66baed94ec8c3.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/0d7bc2b1743a41ff9a5b28c08d40265d.png
[5bb6047edb9ee2682e1e4df3c9c76ebb.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/bf9e19f4f407487e907d97eb91f669f6.png
[bd6c0f73af18b5f7345b74fb5e3fcc52.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/f750eb20b9764af09d3a00f082cdae41.png
[48ec036825a525d7ae01c5b6c7d5ffde.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/2da3d48a89334f6ca0e57c8da6052714.png
[f00958c3a15fee67d83af5cbdeda67f0.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/ddbee36f15ed47a39cc55bb3234d9667.png
[https_plugins.jetbrains.com_plugin_6317-lombok_versions]: https://plugins.jetbrains.com/plugin/6317-lombok/versions
[1a0058087eeeb1554f78836372080c97.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/b008f595bab5416cb30712037cf1eb6f.png
[9eb8edf2174b9a1a9d9c773551ac9e6f.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/d542fda031fe4bf9b707ab5150e27477.png
[7bb1b5944720a110313e1066c07393d6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/a30d015cb75d4fefa721f977275fa4d7.png
[cd9e682c5c818a749990b1b0e5363f52.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/14c2991d2e3c407c829b4bd40350a55e.png
[d2483a2c5939ec26a29ba96965ddea93.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/f309ab26ee384082817c1bdbfa604603.png
[7ffd718fc48ef71f25ebade41cb2f604.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/0f3632aa7b434dbcb29f71b6876df3ff.png
[https_baomidou.com]: https://baomidou.com/
[f8e62d2b80277e4a6b569d8354788860.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/ab24a7ad33d148f48792ff09406598f9.png
[c2c36aab20ca48dcebdbb3bed2d51120.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/516967e9653c4134a6ecdc617e5cba5a.png
[2af44c355503d36bea246ced43729761.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/9936be12679c46eb99ef91ae56dfec85.png
[https_baomidou.com_pages_223848]: https://baomidou.com/pages/223848/
[a9d28ce103b62ba6b784321b4a1de2e7.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/9902c64319384f9e9e885598a5e40851.png
[19217c0c076c0cc5dfaaed656b45e43d.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/3c6b58d130a0410caf8c23813a687b6b.png
[492d3d5b0a1d366cc44990f41b96e9f8.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/d88fc392a8b74423b7ead28e08fe5451.png
[61f1b3318285e2da49740f750472e80b.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/6d4c34f9ad554efa9352308b1f16c69c.png
[2a3259a6fdac197bdd7ab0f7ed442d39.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/bbe3f03f4f774572adc9b3cfaaac44e0.png
[850081b0db70728380ab14e5e2465029.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/2b0e889e33b84d98937835f039a6224e.png
[0182386b0f4b01a9189353012c23e9d3.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/74a930d074194b06a54e7d94ad3c243e.png
[http_localhost_8800_admin_system_sysRole_findAll]: http://localhost:8800/admin/system/sysRole/findAll
[9e55a10b06089b5850de22c1720a1dec.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/9c747c984f6f4074bb9d29a7e4639928.png
[9f53537f126669fe8da2da5d3c2ed5e4.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/6e2c27f61af14a63941792288ca2a7d8.png
[1cb31019b80ef9a264d9ad7e1c0701ad.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/f899351bc62e4ffdb52ec92ed6b3a75f.png
[441c78f8785056380f42039a888ff24e.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/c603c65809564ef39a872ae7c0cc611e.png
[https_doc.xiaominfo.com]: https://doc.xiaominfo.com/
[http_localhost_8800_doc.html]: http://localhost:8800/doc.html
[bc31d6d35d50ccac47b7410ae29a3868.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/2abd2da12681473eabc5612f834d6cb0.png
[3f772138a54f20aec880c53330d4f6df.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/29/69b3c7c2e8764c14a7ef8235aa907b8a.png