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  • SSM框架整合(Spring+SrpingMVC+Mybatis) 简单案例

    简介:

      SSM框架是Spring,SpringMVC 和Mybatis框架的整合,是标准的MVC模式,将整个系统划分为表现层,controller层,service层,dao层四层。

      Spring实现对业务对象的管理,SpirngMVC负责请求的转发和视图管理,Mybatis作为数据对象的持久化引擎。

    为什么要用ssm?

    为什么使用mybatis?
    1、数据库没有连接池,每次请求都会重新创建。
      mybatis:使用线程池
    
    2、sql语句是写死在代码中,不利于代码维护。
      mybatis:在xml中配置
    
    3、preparedStatement 中的设置的参数也是写的死,同样不利于维护。
      mybatis:在xml中配置
    
    4、数据从数据库获取后,读取方式同样是写死的。
      mybatis:自动映射。
    
    简单来说就是为了使数据层更灵活,更方便。
    
     
    
    为什么使用Spring?
    spring 的两个大的特点就是控制反转(Ioc)和面向切面(AOP)
    
    1、轻量级的容器框架没有侵入性;
    
    2、使用IoC容器更加容易组合对象之间的直接关系,面向接口编程,降低耦合;
    
    3、使用AOP可以更加容易的进行功能扩展;
    
    4、创建对象默认是单例的,不需要再使用单例模式进行处理。
    
    简单来说就是降低对象间的耦合性,简化开发,编写出易于管理的代码。
    
    
    
    为什么使用SrpingMVC?
    1、进行更简洁的Web层的开发;
    
    2、天生与Spring框架集成(如IoC容器、AOP等);
    
    3、提供强大的约定大于配置的契约式编程支持;
    
    4、支持灵活的URL到页面控制器的映射;
    
    5、非常容易与其他视图技术集成,如Velocity、FreeMarker等等,因为模型数据不放在特定的API里,而是放在一个Model里(Map数据结构实现,因此很容易被其他框架使用);
    
    6、非常灵活的数据验证、格式化和数据绑定机制,能使用任何对象进行数据绑定,不必实现特定框架的API;
    
    7、支持Restful风格。
    
     
    为什么使用ssm

    简单案例:

    一,创建web项目,建好项目结构目录(controller,service,mapper等目录),引入所需的jar包并配置tomcat

     这里放上最终的项目结构:

    pom.xml(继承于父工程,没有写版本信息)

    <?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">
        <parent>
            <artifactId>project_parent</artifactId>
            <groupId>com.com.zy</groupId>
            <version>1.0-SNAPSHOT</version>
            <relativePath>../project_parent/pom.xml</relativePath>
        </parent>
        <modelVersion>4.0.0</modelVersion>
    
        <artifactId>child_ssmDemo</artifactId>
    
        <packaging>war</packaging>
    
        <dependencies>
            <!--mybatis-->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
            </dependency>
            <!--spring-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
            </dependency>
            <!--mybatis-spring-->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
            </dependency>
    
            <!--jsp相关-->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>jsp-api</artifactId>
            </dependency>
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
            </dependency>
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
            </dependency>
    
            <!--mysql-->
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
            </dependency>
            <!--Druid连接池-->
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.9</version>
            </dependency>
    
            <!--json处理工具包-->
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
            </dependency>
    
            <!--junit-->
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
            </dependency>
    
            <!--log-->
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </dependency>
    
            <!-- Apache工具组件 -->
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-lang3</artifactId>
            </dependency>
            <dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-io</artifactId>
            </dependency>
    
            <!--PageHelper-->
            <dependency>
                <groupId>com.github.pagehelper</groupId>
                <artifactId>pagehelper</artifactId>
            </dependency>
            <dependency>
                <groupId>com.github.jsqlparser</groupId>
                <artifactId>jsqlparser</artifactId>
            </dependency>
        </dependencies>
    
        <build>
            <plugins>
                <!--tomcat-->
                <plugin>
                    <groupId>org.apache.tomcat.maven</groupId>
                    <artifactId>tomcat7-maven-plugin</artifactId>
                    <version>2.2</version>
                    <configuration>
                        <path>/</path>
                        <port>8080</port>
                    </configuration>
                </plugin>
            </plugins>
        </build>
    </project>
    pom.xml

    dbconfig.properties

    jdbc.driverClassName=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://127.0.0.1:3306/temp_db?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true
    jdbc.username=root
    jdbc.password=root
    dbconfig.properties

    log4j.properties

    log4j.rootLogger=DEBUG,A1
    log4j.logger.com.taotao = DEBUG
    log4j.logger.org.mybatis = DEBUG
    
    log4j.appender.A1=org.apache.log4j.ConsoleAppender
    log4j.appender.A1.layout=org.apache.log4j.PatternLayout
    log4j.appender.A1.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c]-[%p] %m%n
    log4j.properties

     

    二,准备数据库表及数据

    CREATE TABLE `tb_user` (
      `id` BIGINT(20) NOT NULL AUTO_INCREMENT,
      `username` VARCHAR(100) DEFAULT NULL COMMENT '用户名',
      `password` VARCHAR(100) DEFAULT NULL COMMENT '密码',
      `name` VARCHAR(100) DEFAULT NULL COMMENT '姓名',
      `age` INT(10) DEFAULT NULL COMMENT '年龄',
      `sex` TINYINT(1) DEFAULT NULL COMMENT '性别,1男性,2女性',
      `birthday` DATE DEFAULT NULL COMMENT '出生日期',
      `created` DATETIME DEFAULT NULL COMMENT '创建时间',
      `updated` DATETIME DEFAULT NULL COMMENT '更新时间',
      PRIMARY KEY (`id`),
      UNIQUE KEY `username` (`username`)
    ) 
    
    INSERT INTO `tb_user` VALUES (NULL, 'zhangxueyou', '123456', '张学友', '30', '1', '1984-08-08', '2014-09-19 16:56:04', '2014-09-21 11:24:59');
    INSERT INTO `tb_user` VALUES (NULL, 'liudehua', '123456', '刘德华', '21', '2', '1991-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
    INSERT INTO `tb_user` VALUES (NULL, 'guofucheng', '123456', '郭富城', '22', '2', '1989-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
    INSERT INTO `tb_user` VALUES (NULL, 'liming', '123456', '黎明', '20', '1', '1988-09-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
    INSERT INTO `tb_user` VALUES (NULL, 'linghuchong', '123456', '令狐冲', '28', '1', '1985-01-01', '2014-09-19 16:56:04', '2014-09-19 16:56:04');
    INSERT INTO `tb_user` VALUES (NULL, 'zhangsanfeng', '123456', '张三丰', '23', '1', '1988-08-08', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
    INSERT INTO `tb_user` VALUES (NULL, 'lixunhua', '123456', '李寻欢', '23', '1', '1988-08-08', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
    INSERT INTO `tb_user` VALUES (NULL, 'sunyanzi', '123456', '孙燕姿', '23', '1', '1988-08-08', '2014-09-20 11:41:15', '2014-09-20 11:41:15');
    创建表及插入数据

    三,先整合spring和mybatis

    3.1 分析:

    1. mybatis框架操作数据库 需要 sqlSessionFactory
    2. sqlSessionFactory 需要 连接池 datasource
    3. sqlSessionFactory的可以交给spring管理
    4. mapper接口的实现也可以交给spring去管理
    5. 可以在spring配置中关联mybatis的配置文件

    3.2 创建User的JavaBean类:

    package com.zy.model;
    
    import org.springframework.format.annotation.DateTimeFormat;
    
    import java.util.Date;
    
    public class User {
    
        private Long id;
    
        // 用户名
        private String userName;
    
        // 密码
        private String password;
    
        // 姓名
        private String name;
    
        // 年龄
        private Integer age;
    
        // 性别,1男性,2女性
        private Integer sex;
    
        // 出生日期
        @DateTimeFormat(pattern = "yyyy-MM-dd")
        private Date birthday;
    
        // 创建时间
        private Date created;
    
        // 更新时间
        private Date updated;
    
        public Long getId() {
            return id;
        }
    
        public void setId(Long id) {
            this.id = id;
        }
    
        public String getuserName() {
            return userName;
        }
    
        public void setuserName(String userName) {
            this.userName = userName;
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name;
        }
    
        public Integer getAge() {
            return age;
        }
    
        public void setAge(Integer age) {
            this.age = age;
        }
    
        public Integer getSex() {
            return sex;
        }
    
        public void setSex(Integer sex) {
            this.sex = sex;
        }
    
        public Date getBirthday() {
            return birthday;
        }
    
        public void setBirthday(Date birthday) {
            this.birthday = birthday;
        }
    
        public Date getCreated() {
            return created;
        }
    
        public void setCreated(Date created) {
            this.created = created;
        }
    
        public Date getUpdated() {
            return updated;
        }
    
        public void setUpdated(Date updated) {
            this.updated = updated;
        }
    
        @Override
        public String toString() {
            return "User [id=" + id + ", userName=" + userName + ", password=" + password + ", name=" + name
                    + ", age=" + age + ", sex=" + sex + ", birthday=" + birthday + ", created=" + created
                    + ", updated=" + updated + "]";
        }
    
    }
    User JavaBean

    3.2 创建mapper接口,并添加方法:

    public interface UserMapper {
        //根据id修改名字
        public void editUserName(@Param("id") long id, @Param("name") String name);
    
        //获取user列表
        public List<User> getUserList();
    }

    3.3 在resource/mybatis下创建mybatis配置文件mybatis-config.xml:

    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE configuration
            PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
        <!--开启驼峰标识-->
        <settings>
            <setting name="mapUnderscoreToCamelCase" value="true"/>
        </settings>
    </configuration>

    3.4 在resource/spring下创建spring配置文件applicationContext.xml并进行配置:

    <?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: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">
    
        <!--引入外部数据库配置文件-->
        <context:property-placeholder location="classpath:dbconfig.properties"/>
        <!--配置Druid数据库-->
        <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
            <property name="driverClassName" value="${jdbc.driverClassName}"/>
            <property name="url" value="${jdbc.url}"/>
            <property name="username" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
        </bean>
    
        <!--mybatis依赖的 sqlsessionFactory-->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!--注入数据库连接-->
            <property name="dataSource" ref="druidDataSource"/>
            <!--关联mybatis配置文件-->
            <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
            <!--扫描domain包 代替mybatis起别名-->
            <property name="typeAliasesPackage" value="com.zy.domain"/>
            <!--关联mapper.xml文件-->
            <property name="mapperLocations" value="classpath:mybatis/mapper/**/*Mapper.xml"/>
        </bean>
    
        <!--扫描mapper接口包 srping使用动态代理创建mapper接口实现类-->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.zy.mapper"></property>
        </bean>
    </beans>

    3.5 在resource/mybatis/mapper下创建UserMapper对应的UserMapper.xml文件:

    <?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.zy.mapper.UserMapper">
        <update id="editUserName">
            update tb_user set name=#{name} where id=#{id}
        </update>
    </mapper>

    3.6 mapper单元测试:

    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration(locations = "classpath:spring/applicationContext.xml")
    public class UserMapperTest {
        @Value("#{userMapper}")
        UserMapper userMapper;
    
        @Test
        public void editUserName() throws Exception {
            userMapper.editUserName(1, "张三三");
        }
    
    }

     

     四,添加业务层并添加事务

    4.1 applicationContext.xml中添加事务管理器配置,并开启事务注解

    <?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
           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/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    
        <!--引入外部数据库配置文件-->
        <context:property-placeholder location="classpath:dbconfig.properties"/>
        <!--配置Druid数据库-->
        <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
            <property name="driverClassName" value="${jdbc.driverClassName}"/>
            <property name="url" value="${jdbc.url}"/>
            <property name="username" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
        </bean>
    
        <!--mybatis依赖的 sqlsessionFactory-->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!--注入数据库连接-->
            <property name="dataSource" ref="druidDataSource"/>
            <!--关联mybatis配置文件-->
            <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
            <!--扫描domain包 代替mybatis起别名-->
            <property name="typeAliasesPackage" value="com.zy.domain"/>
            <!--关联mapper.xml文件-->
            <property name="mapperLocations" value="classpath:mybatis/mapper/**/*Mapper.xml"/>
        </bean>
    
        <!--扫描mapper接口包 srping使用动态代理创建mapper接口实现类-->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.zy.mapper"></property>
        </bean>
    
        <!--实例化 事务管理器-->
        <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="druidDataSource"/>
        </bean>
    
        <!--开启事务注解-->
        <tx:annotation-driven transaction-manager="transactionManager"/>
    
    
        <!--扫描注解 业务层交给spring管理-->
        <context:component-scan base-package="com.zy.service"></context:component-scan>
    </beans>

    4.2 创建业务类UserService添加注解并配置扫描注解 将业务层交给spring管理(已经在上面提前加上了):

    @Service
    public class UserService {
        @Value("#{userMapper}")
        private UserMapper userMapper;
    
        //同时修改两个id的name
        @Transactional
        public void eidtUserNames(long id1, String name1, long id2, String name2) {
            userMapper.editUserName(id1, name1);
            int i = 1 / 0;//制造异常
            userMapper.editUserName(id2, name2);
        }
    }

    4.3 单元测试:

    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration(locations = "classpath:spring/applicationContext.xml")
    public class UserServiceTest {
        @Value("#{userService}")
        private UserService userService;
    
        @Test
        public void eidtUserNames() throws Exception {
            userService.eidtUserNames(1, "张影帝", 2, "刘天王");
        }
    }

    五,在上面的基础上整合SpringMVC

    5.1 在web.xml中配置监听器,以便在tomcat启动后直接实例化spring容器:

    <?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_3_1.xsd"
             version="3.1">
        <!--指定spring配置文件的位置-->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/applicationContext.xml</param-value>
        </context-param>
    
        <!--tomcat启动后实例化spring容器的监听器-->
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
    </web-app>

    5.2 在web.xml中配置DispatcherServlet信息:

    <?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_3_1.xsd"
             version="3.1">
        <!--指定spring配置文件的位置-->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring/applicationContext.xml</param-value>
        </context-param>
    
    
        <!--处理post乱码的过滤器-->
        <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>
    
        <!--配置监听器-->
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
    
        <!--配置servlet信息-->
        <servlet>
            <servlet-name>springmvc</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <!--加载springmvc的配置文件-->
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:spring/applicationContext_springmvc.xml</param-value>
            </init-param>
        </servlet>
        <servlet-mapping>
            <servlet-name>springmvc</servlet-name>
            <!--拦截-->
            <url-pattern>*.do</url-pattern>
        </servlet-mapping>
    </web-app>

    5.3 添加并配置5.2中整合mvc的配置文件applicationContext_springmvc.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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
        <!--HandlerMapping和HandlerAdapter-->
        <mvc:annotation-driven/>
        <!--扫描controller包-->
        <context:component-scan base-package="com.zy.controller"/>
    
        <!--视图解析器-->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <!--前缀-->
            <property name="prefix" value="/WEB-INF/views/"/>
            <!--后缀-->
            <property name="suffix" value=".jsp"/>
        </bean>
    
        <!--对于静态资源不拦截-->
        <mvc:default-servlet-handler/>
    </beans>

    5.4 创建WEB-INF/views文件夹并创建UserController:

    @Controller
    @RequestMapping("/user")
    public class UserController {
        @Value("#{userService}")
        private UserService userService;
    
        @RequestMapping("/editUsers")
        public ModelAndView editUserNames() {
            ModelAndView mv = new ModelAndView("success");
            userService.eidtUserNames(1, "张天王", 2, "刘影帝");
            mv.addObject("msg", "success");
            return mv;
        }
    }

    运行tomcat访问http://localhost:8080/user/editUsers,然后看一下数据库数据是否已经改变即可。

    再来把User列表的json数据信息返回到页面:

    UserMapper添加方法:

    public interface UserMapper {
        //根据id修改名字
        public void editUserName(@Param("id") long id, @Param("name") String name);
    
        //获取user列表
        public List<User> getUserList();
    }

    UserMapper.xml添加sql:

    <?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.zy.mapper.UserMapper">
        <update id="editUserName">
            update tb_user set name=#{name} where id=#{id}
        </update>
        <select id="getUserList" resultType="User">
            select * from tb_user
        </select>
    </mapper>

    UserService添加获取list方法:

    @Service
    public class UserService {
        @Value("#{userMapper}")
        private UserMapper userMapper;
    
        //同时修改两个id的name
        @Transactional
        public void eidtUserNames(long id1, String name1, long id2, String name2) {
            userMapper.editUserName(id1, name1);
            //int i = 1 / 0;
            userMapper.editUserName(id2, name2);
        }
        //获取userlist数据
        public List<User> getUserList() {
            return userMapper.getUserList();
        }
    }

    UserController添加对应的controller方法:

    @Controller
    @RequestMapping("/user")
    public class UserController {
        @Value("#{userService}")
        private UserService userService;
    
        @RequestMapping("/editUsers")
        public ModelAndView editUserNames() {
            ModelAndView mv = new ModelAndView("success");
            userService.eidtUserNames(1, "张天王", 2, "刘影帝");
            mv.addObject("msg", "success");
            return mv;
        }
    
        @RequestMapping("/userList")
        @ResponseBody
        public ModelAndView getUserList() {
            ModelAndView mv = new ModelAndView("user_list");
            mv.addObject("userList", userService.getUserList().toString());
            return mv;
        }
    }

    运行tomcat访问http://localhost:8080/user/userList.do:

    以上。

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  • 原文地址:https://www.cnblogs.com/blazeZzz/p/9343535.html
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