SSM框架整合（以及遇到的各种问题）

r囧r小猫 2021-09-07 06:22 910阅读 0赞

### SSM框架整合 ###

*  报错和原因
 *   *  1.maven编译 Process terminated
     *  2.maven导入了依赖找不到包
     *  3.Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4
     *  4 IDEA install项目时报错Please refer to…for the individual test results.
     *   *  在maven 工程的pom.xml文件中加入
         *  关闭maven的运行检查
     *  5.idea中无法自动装配Could not autowire. No beans of 'UserMapper' type found. more...
     *  6.无法在web.xml或使用此应用程序部署的jar文件中解析绝对uri：\[http://java.sun.com/jsp/jstl/core\]解决方法
 *  环境搭建
 *   *  整体结构
     *  首先创建一个空的maven项目
     *  添加web
     *  在pom.xml导入ssm的依赖
     *  配置web.xml
     *  配置mvc.xml
     *  各个层的代码编写
     *   *  entity
         *  dao层
         *  UserMapper.xml
         *  service层
         *  controller层
     *  jdbc.properties
     *  配置applicationContext.xml
     *  logback配置文件

虽然学完了SSM开始整合了但是一整合就各种报错，所以大家一定要小心小心再小心，千万不要用idea的2020.1的版本全是bug趁早卸了换其他更稳定的版本

# 报错和原因 #

## 1.maven编译 Process terminated ##

首先第一个坑就是创建maven的项目名称时一定不要起中文名字  
造成这个的原因可能有很多，然后我的问题就是项目的中文名字，时导致

<groupId>org.example</groupId>
    <artifactId>ssm1</artifactId>
    <version>1.0-SNAPSHOT</version>

artifactId里面有中文名字引起的

## 2.maven导入了依赖找不到包 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODY2MTUz_size_16_color_FFFFFF_t_70]  
这个是idea2020.1的锅

## 3.Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4 ##

<build>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-surefire-plugin</artifactId>
                    <version>2.4.2</version>
                    <configuration>
                        <skipTests>true</skipTests>
                    </configuration>
                </plugin>
            </plugins>
    </build>

## 4 IDEA install项目时报错Please refer to…for the individual test results. ##

两种解决方案

### 在maven 工程的pom.xml文件中加入 ###

<build>
    <plugins>
    <plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <configuration>
    <testFailureIgnore>true</testFailureIgnore> 
     
    </configuration>
    </plugin>
    </plugins>
    </build>

### 关闭maven的运行检查 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODY2MTUz_size_16_color_FFFFFF_t_70 1]

## 5.idea中无法自动装配Could not autowire. No beans of ‘UserMapper’ type found. more… ##

还有其他的解决方法：[大佬博客的解决方法链接][Link 1]  
在自动转配的注解后面添加(required=false)

@Autowired(required=false)
    public UserMapper userMapper;

## 6.无法在web.xml或使用此应用程序部署的jar文件中解析绝对uri：\[http://java.sun.com/jsp/jstl/core\]解决方法 ##

这是idea的问题，有时候导入了报错最好检查一下这个lib里面可能jar不存在  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODY2MTUz_size_16_color_FFFFFF_t_70_pic_center]

最后就是千万不要用idea的2020.1的版本全是bug趁早卸了换其他更稳定的版本

还有一些其他的错误这里就不一一列举了还是要仔细小心

# 环境搭建 #

## 整体结构 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODY2MTUz_size_16_color_FFFFFF_t_70_pic_center 1]

## 首先创建一个空的maven项目 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODY2MTUz_size_16_color_FFFFFF_t_70_pic_center 2]

## 添加web ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODY2MTUz_size_16_color_FFFFFF_t_70_pic_center 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ0ODY2MTUz_size_16_color_FFFFFF_t_70_pic_center 4]

## 在pom.xml导入ssm的依赖 ##

<?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>
        <packaging>war</packaging>
    
        <groupId>org.example</groupId>
        <artifactId>dykssm1</artifactId>
        <version>1.0-SNAPSHOT</version>
        <properties>
            <java.version>13</java.version>
            <maven.compiler.source>${java.version}</maven.compiler.source>
            <maven.compiler.target>${java.version}</maven.compiler.target>
        </properties>
        <dependencies>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>5.2.7.RELEASE</version>
            </dependency>
    
            
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>javax.servlet-api</artifactId>
                <version>3.1.0</version>
                <scope>provided</scope>
            </dependency>
    
            <dependency>
                <groupId>javax.servlet.jsp</groupId>
                <artifactId>jsp-api</artifactId>
                <version>2.2</version>
                <scope>provided</scope>
            </dependency>
    
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
                <scope>provided</scope>
            </dependency>
    
    
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>fastjson</artifactId>
                <version>1.2.75</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.2.7.RELEASE</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
                <version>5.2.7.RELEASE</version>
            </dependency>
    
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>5.2.7.RELEASE</version>
            </dependency>
    
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>1.3.3</version>
            </dependency>
    
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>8.0.20</version>
            </dependency>
    
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
    
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>3.5.5</version>
            </dependency>
    
            <dependency>
    
                <groupId>com.alibaba</groupId>
    
                <artifactId>druid</artifactId>
    
                <version>1.1.16</version>
            </dependency>
    
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>1.7.30</version>
            </dependency>
    
            <dependency>
                <groupId>ch.qos.logback</groupId>
                <artifactId>logback-classic</artifactId>
                <version>1.2.3</version>
            </dependency>
    
            
            <dependency>
                <groupId>javax.annotation</groupId>
                <artifactId>javax.annotation-api</artifactId>
                <version>1.3.2</version>
            </dependency>
    
    
    
        </dependencies>
    
        
        <build>
            <resources>
                <resource>
                    <directory>src/main/resources</directory>
                    <includes>
                        <include>**/*.properties</include>
                        <include>**/*.xml</include>
                    </includes>
                    <filtering>true</filtering>
                </resource>
                <resource>
                    <directory>src/main/java</directory>
                    <includes>
                        <include>**/*.properties</include>
                        <include>**/*.xml</include>
                    </includes>
                    <filtering>true</filtering>
                </resource>
            </resources>
        </build>
    </project>

## 配置web.xml ##

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0">
    
    
    
    
    
    
        <servlet>
            <servlet-name>mvc_my</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:mvc.xml</param-value>
            </init-param>
        </servlet>
        <servlet-mapping>
            <servlet-name>mvc_my</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
    
    
    
    
        <filter>
            <filter-name>encoding</filter-name>
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
            <init-param>
                <param-name>encoding</param-name>
                <param-value>utf-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>encoding</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
    
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </context-param>
    
    </web-app>

## 配置mvc.xml ##

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:mvc="http://www.springframework.org/schema/mvc"
           xmlns:context="http://www.springframework.org/schema/context"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context.xsd
           http://www.springframework.org/schema/mvc
           https://www.springframework.org/schema/mvc/spring-mvc.xsd ">
    
    
        
        <context:component-scan base-package="com.blb.web" use-default-filters="false">
            <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
    
        
        <mvc:annotation-driven>
    
            
            <mvc:message-converters register-defaults="false">
    
                <bean id="fastJsonHttpMessageConverter"
                      class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                    
                    <property name="supportedMediaTypes">
                        <list>
                            
                            <value>text/html;charset=UTF-8</value>
                            <value>application/json;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
            </mvc:message-converters>
    
        </mvc:annotation-driven>
    
        
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    
            
            <property name="prefix" value="/"></property>
            
            <property name="suffix" value=".jsp"></property>
        </bean>
    
        <mvc:default-servlet-handler></mvc:default-servlet-handler>
    
    
    </beans>

## 各个层的代码编写 ##

这里我主要是整合的笔记还不是项目，所有都没有什么具体的功能就是打印了

### entity ###

public class User { 
        private Integer id;
        private String username;
        private String password;
        private String sex;
        private Date registTime;
    
    	get/set
     }

### dao层 ###

UserMapper

package com.blb.dao;
    
    import com.blb.entity.User;
    
    
    import java.util.List;
    
    public interface UserMapper { 
        public List<User> queryUsers();
    }

### UserMapper.xml ###

<?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.blb.dao.UserMapper">
     <select id="queryUsers" resultType="User">
         select id,name,password,sex,regist_time registerTime
         from t_users
     </select>
    </mapper>

### service层 ###

package com.blb.service;
    
    import com.blb.entity.User;
    
    import java.util.List;
    
    public interface UserService { 
        public List<User> queryUsers();
    }

### controller层 ###

package com.blb.web;
    
    import com.blb.entity.User;
    import com.blb.service.UserService;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.*;
    
    
    import java.util.List;
    
    @Controller
    public class UserController { 
    
     private UserService userService;
        @GetMapping("/users")
        public String queryUsers(Model model){ 
            System.out.println("queryUsers");
             List<User> users = userService.queryUsers();
             model.addAttribute("users",users);
            return "index";
    
        }
        @GetMapping("/users/{id}")
        public String queryOne(@PathVariable Integer id){ 
            System.out.println("query users with get :"+id);
            return "index";
    
        }
    
        @PutMapping("/users")
        public String updateUser(@RequestBody User user){ 
            System.out.println("update user with put: "+user);
            return "index";
        }
        @DeleteMapping("/users/{id}")
        public String deleteOne(@PathVariable Integer id){ 
            System.out.println("delete one user with delete:"+id);
            return "index";
        }
        @PostMapping("/users")
        public String saveUser(@RequestBody User user){ 
            System.out.println("save user with post: "+user);
            return "index";
        }
    }

## jdbc.properties ##

jdbc.driver=com.mysql.cj.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/db3?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8
    jdbc.username=root
    jdbc.password=123456
    jdbc.init=1
    jdbc.minIdle=1
    jdbc.maxActive=10

## 配置applicationContext.xml ##

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
    
        
        <context:property-placeholder location="classpath:jdbc.properties" />
    
        <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
    
            <property name="driverClassName" value="${jdbc.driver}"></property>
            <property name="url" value="${jdbc.url}"></property>
            <property name="username" value="${jdbc.username}"></property>
            <property name="password" value="${jdbc.password}"></property>
    
    
            <property name="initialSize" value="${jdbc.init}"></property>
            <property name="minIdle" value="${jdbc.minIdle}"></property>
            <property name="maxActive" value="${jdbc.maxActive}"></property>
    
    
            <property name="maxWait" value="60000"></property>
    
    
            <property name="timeBetweenEvictionRunsMillis" value="60000"></property>
    
    
            <property name="minEvictableIdleTimeMillis" value="300000"></property>
        </bean>
    
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            
            <property name="dataSource" ref="dataSource"></property>
            
            <property name="mapperLocations">
                <list>
                    <value>classpath:com/blb/dao/*.xml</value>
                </list>
            </property>
            
            <property name="typeAliasesPackage" value="com.blb.entity"></property>
        </bean>
    
        <bean id="MapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            
            
            <property name="basePackage" value="com.blb.dao"></property>
            
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
        </bean>
    
        <context:component-scan base-package="com.blb" use-default-filters="true">
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
    
        
        <bean id="tx" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
    
        
        <tx:annotation-driven transaction-manager="tx"></tx:annotation-driven>
    
    </beans>

## logback配置文件 ##

<?xml version="1.0" encoding="utf-8"?>
    <configuration>
        
        <appender name="console" class="ch.qos.logback.core.ConsoleAppender">
            
            <encoder>
                
                <pattern>[%thread] %d{ HH:mm:ss.SSS} %-5level %logger{ 36} - %msg%n</pattern>
            </encoder>
        </appender>
    
        
        <root level="debug">
            
            <appender-ref ref="console"/>
        </root>
    </configuration>

有时候如果没配置好代码格式在xml里面写中文注释，即使注释了也可能报错，XML文件存在中文注释报错问题（ 3 字节的 UTF-8 序列的字节 3 无效），如果出现类似的问题直接把注释都删了试一下

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[Link 1]: https://blog.csdn.net/weixin_41935702/article/details/88852598
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