使用IDEA创建springboot多模块项目（一）

客官°小女子只卖身不卖艺 2023-10-07 14:52 23阅读 0赞

## 使用IDEA创建springboot多模块项目 ##

### 刚下载使用IDEA的朋友可以参考以下设置： ###

1.  **IDEA基本设置** : [https://blog.csdn.net/weixin\_40816738/article/details/90116150][https_blog.csdn.net_weixin_40816738_article_details_90116150].
2.  **IDEA中已配置阿里镜像，但maven无法下载jar包的问题** [https://blog.csdn.net/redhat0921/article/details/104969687][https_blog.csdn.net_redhat0921_article_details_104969687].  
    最新Maven阿里云仓库配置【亲测有效】  
    : [https://www.cnblogs.com/JaxYoun/p/12699291.html][https_www.cnblogs.com_JaxYoun_p_12699291.html].
3.  **IDEA每次建新项目都要重新配置maven的设置** [https://www.cnblogs.com/Marydon20170307/p/13277870.html?utm\_source=tuicool][https_www.cnblogs.com_Marydon20170307_p_13277870.html_utm_source_tuicool].

#### 首先创建一个maven项目 ####

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#### 删除src目录 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 1]

#### 创建Module ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 2]  
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#### 依次创建dao entity service 子模块 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 4]

### 注意：使用springboot创建web或API模块（controller层） ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 5]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 6]  
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### 删除无用文件，只留下src ###

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### 测试项目是否能正常运行 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 9]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 10]

### 添加模块之间的依赖 ###

目前有四个子模块：web、service、dao、entity  
依赖关系是：

1.  web模块依赖service模块
2.  service模块依赖dao模块
3.  dao模块依赖entity模块

### 添加web模块pom.xml的依赖 ###

<parent>
            <artifactId>zm</artifactId>
            <groupId>org.example</groupId>
            <version>1.0-SNAPSHOT</version>
        </parent>

<dependencies>
            
            <dependency>
                <groupId>${project.parent.groupId}</groupId>
                <artifactId>service</artifactId>
                <version>${project.parent.version}</version>
            </dependency>
        </dependencies>

### 添加service模块pom.xml的依赖 ###

<dependencies>
            
            <dependency>
                <groupId>${project.parent.groupId}</groupId>
                <artifactId>dao</artifactId>
                <version>${project.parent.version}</version>
            </dependency>
        </dependencies>

### 添加dao模块pom.xml的依赖 ###

<dependencies>
            
            <dependency>
                <groupId>${project.parent.groupId}</groupId>
                <artifactId>entity</artifactId>
                <version>${project.parent.version}</version>
            </dependency>
        </dependencies>

### entity模块pom.xml只需要添加lombok依赖 ###

<dependencies>
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <optional>true</optional>
            </dependency>
        </dependencies>

### 最后修改最外层pom.mxl添加springboot依赖 ###

<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.4.RELEASE</version>
        <relativePath/>
    </parent>

### 注意:项目如果报红，刷新maven即可 ###

### 整合mybatis ###

#### 在entity模块创建实体类 ####

package com.zm.entity;
    
    import lombok.AllArgsConstructor;
    import lombok.Data;
    import lombok.NoArgsConstructor;
    
    @Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class User {
        
    
        private Integer id;
    
        private String name;
    
        private Integer age;
    
        private String skill;
    
        private String evaluate;
    
        private Integer fraction;
    
    }

#### 在dao模块pom.xml添加对应依赖 ####

<dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <scope>runtime</scope>
            </dependency>
            <dependency>
                <groupId>org.mybatis.spring.boot</groupId>
                <artifactId>mybatis-spring-boot-starter</artifactId>
                <version>2.1.1</version>
            </dependency>
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.6</version>
            </dependency>

#### dao模块代码如下 ####

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package com.zm.dao;
    
    import com.zm.entity.User;
    import org.apache.ibatis.annotations.Mapper;
    import org.springframework.stereotype.Repository;
    
    @Mapper
    @Repository
    public interface UserDao {
        
        User selectUserInfoByName(String name);
    }

UserDao.mxl

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    
    <mapper namespace="com.zm.dao.UserDao">
        <resultMap id="BaseResultMap" type="com.zm.entity.User">
            <result column="id" property="id"/>
            <result column="name" property="name"/>
            <result column="age" property="age"/>
            <result column="skill" property="skill"/>
            <result column="evaluate" property="evaluate"/>
            <result column="fraction" property="fraction"/>
        </resultMap>
        <select id="selectUserInfoByName" resultMap="BaseResultMap">
            SELECT * FROM user_info WHERE name = #{name}
        </select>
    </mapper>

#### service模块代码如下 ####

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNjA0ODkw_size_16_color_FFFFFF_t_70_pic_center 12]

package com.zm.service;
    
    import com.zm.entity.User;
    
    public interface UserService {
        
        User selectUserInfoByName(String name);
    }

package com.zm.service.impl;
    
    import com.zm.dao.UserDao;
    import com.zm.entity.User;
    import com.zm.service.UserService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    import org.springframework.transaction.annotation.Transactional;
    
    @Service
    @Transactional
    public class UserServiceImpl implements UserService {
        
    
        @Autowired
        private UserDao userDao;
    
        @Override
        public User selectUserInfoByName(String name) {
        
            return userDao.selectUserInfoByName(name);
        }
    }

#### 配置application.yml ####

server:
      port: 8080
    spring:
      datasource:
          username: root
          password: root
          #?serverTimezone=UTC解决时区的报错
          url: jdbc:mysql://localhost:3306/user?serverTimezone=UTC&useUnicode=true&charactUserDao.xmlerEncoding=utf-8
          driver-class-name: com.mysql.cj.jdbc.Driver
          type: com.alibaba.druid.pool.DruidDataSource
    
          #Spring Boot 默认是不注入这些属性值的，需要自己绑定
          #druid 数据源专有配置
          initialSize: 5
          minIdle: 5
          maxActive: 20
          maxWait: 60000
          timeBetweenEvictionRunsMillis: 60000
          minEvictableIdleTimeMillis: 300000
          validationQuery: SELECT 1 FROM DUAL
          testWhileIdle: true
          testOnBorrow: false
          testOnReturn: false
          poolPreparedStatements: true
    
          #配置监控统计拦截的filters，stat:监控统计、log4j：日志记录、wall：防御sql注入
          #如果允许时报错  java.lang.ClassNotFoundException: org.apache.log4j.Priority
          #则导入 log4j 依赖即可，Maven 地址：https://mvnrepository.com/artifact/log4j/log4j
          filters: stat,wall,log4j
          maxPoolPreparedStatementPerConnectionSize: 20
          useGlobalDataSourceStat: true
          connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
    
    
    mybatis:
        # xml扫描，多个目录用逗号或者分号分隔（告诉 Mapper 所对应的 XML 文件位置）
      mapper-locations: classpath:mapper/*.xml
      type-aliases-package: com.zm.entity

#### 配置WebApplication ####

package com.zm.web;
    
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    @SpringBootApplication(scanBasePackages = "com.zm")
    @MapperScan("com.zm.dao")
    public class WebApplication {
        
        public static void main(String[] args) {
        
            SpringApplication.run(WebApplication.class, args);
        }
    }

#### 配置最外层pom.xml的build ####

<build>
            <resources>
                <resource>
                    <directory>src/main/java</directory>
                    <includes>
                        <include>**/*.yml</include>
                        <include>**/*.properties</include>
                        <include>**/*.xml</include>
                    </includes>
                    <filtering>true</filtering>
                </resource>
                <resource>
                    <directory>src/main/resources</directory>
                    <includes>
                        <include>**/*.yml</include>
                        <include>**/*.properties</include>
                        <include>**/*.xml</include>
                    </includes>
                    <filtering>false</filtering>
                </resource>
            </resources>
        </build>

#### 新建一个user数据库导入测试sql ####

Date: 2020-09-26 12:01:31
    */
    
    SET FOREIGN_KEY_CHECKS=0;
    
    -- ----------------------------
    -- Table structure for `user_info`
    -- ----------------------------
    DROP TABLE IF EXISTS `user_info`;
    CREATE TABLE `user_info` (
      `id` bigint(11) NOT NULL AUTO_INCREMENT COMMENT 'ID',
      `name` varchar(32) DEFAULT NULL COMMENT '姓名',
      `age` int(11) DEFAULT NULL COMMENT '年龄',
      `skill` varchar(32) DEFAULT NULL COMMENT '技能',
      `evaluate` varchar(64) DEFAULT NULL COMMENT '评价',
      `fraction` bigint(11) DEFAULT NULL COMMENT '分数',
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=16 DEFAULT CHARSET=utf8mb4 COMMENT='学生信息表';
    
    -- ----------------------------
    -- Records of user_info
    -- ----------------------------
    INSERT INTO `user_info` VALUES ('1', '小明', '20', '画画', '该学生在画画方面有一定天赋', '89');
    INSERT INTO `user_info` VALUES ('2', '小兰', '19', '游戏', '近期该学生由于游戏的原因导致分数降低了', '64');
    INSERT INTO `user_info` VALUES ('3', '张张', '18', '英语', '近期该学生参加英语比赛获得二等奖', '90');
    INSERT INTO `user_info` VALUES ('4', '大黄', '20', '体育', '该学生近期由于参加篮球比赛,导致脚伤', '76');
    INSERT INTO `user_info` VALUES ('5', '大白', '17', '绘画', '该学生参加美术大赛获得三等奖', '77');
    INSERT INTO `user_info` VALUES ('7', '小龙', '18', 'JAVA', '该学生是一个在改BUG的码农', '59');

#### 启动测试一下，大功告成，这就是一个简单的多模块创建了 ####

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[https_blog.csdn.net_weixin_40816738_article_details_90116150]: https://blog.csdn.net/weixin_40816738/article/details/90116150
[https_blog.csdn.net_redhat0921_article_details_104969687]: https://blog.csdn.net/redhat0921/article/details/104969687
[https_www.cnblogs.com_JaxYoun_p_12699291.html]: https://www.cnblogs.com/JaxYoun/p/12699291.html
[https_www.cnblogs.com_Marydon20170307_p_13277870.html_utm_source_tuicool]: https://www.cnblogs.com/Marydon20170307/p/13277870.html?utm_source=tuicool
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