ssm整合（基于xml配置方式）

2021-08-31 15:02:05

本文是基于xml配置的方式来整合SpringMVC、Spring和Mybatis（基于注解的方式会再写一篇文章），步骤如下：

（1）首先自然是依赖包的配置文件 pom.xml

<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/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>

  <groupId>com.xuebusi</groupId>

  <artifactId>xssm</artifactId>

  <packaging>war</packaging>

  <version>1.0-SNAPSHOT</version>

  <name>ssm Maven Webapp</name>

  <url>http://maven.apache.org</url>

  <!-- 集中定义依赖版本号 -->

  <properties>

    <generator.version>1.3.2</generator.version>

    <junit.version>4.12</junit.version>

    <spring.version>4.1.3.RELEASE</spring.version>

    <mybatis.version>3.2.8</mybatis.version>

    <mybatis.spring.version>1.2.2</mybatis.spring.version>

    <mybatis.paginator.version>1.2.15</mybatis.paginator.version>

    <mysql.version>5.1.32</mysql.version>

    <slf4j.version>1.6.4</slf4j.version>

    <jackson.version>2.4.2</jackson.version>

    <druid.version>1.0.9</druid.version>

    <httpclient.version>4.3.5</httpclient.version>

    <jstl.version>1.2</jstl.version>

    <servlet-api.version>2.5</servlet-api.version>

    <jsp-api.version>2.0</jsp-api.version>

    <joda-time.version>2.5</joda-time.version>

    <commons-lang3.version>3.3.2</commons-lang3.version>

    <commons-io.version>1.3.2</commons-io.version>

    <commons-net.version>3.3</commons-net.version>

    <pagehelper.version>3.4.2</pagehelper.version>

    <jsqlparser.version>0.9.1</jsqlparser.version>

    <commons-fileupload.version>1.3.1</commons-fileupload.version>

    <jedis.version>2.7.2</jedis.version>

    <solrj.version>4.10.3</solrj.version>

  </properties>

  <!-- 依赖管理 -->

  <dependencies>

    <!-- 逆向工程 -->

    <dependency>

      <groupId>org.mybatis.generator</groupId>

      <artifactId>mybatis-generator-core</artifactId>

      <version>${generator.version}</version>

    </dependency>

    <!-- 时间操作组件 -->

    <dependency>

      <groupId>joda-time</groupId>

      <artifactId>joda-time</artifactId>

      <version>${joda-time.version}</version>

    </dependency>

    <!-- Apache工具组件 -->

    <dependency>

      <groupId>org.apache.commons</groupId>

      <artifactId>commons-lang3</artifactId>

      <version>${commons-lang3.version}</version>

    </dependency>

    <dependency>

      <groupId>org.apache.commons</groupId>

      <artifactId>commons-io</artifactId>

      <version>${commons-io.version}</version>

    </dependency>

    <dependency>

      <groupId>commons-net</groupId>

      <artifactId>commons-net</artifactId>

      <version>${commons-net.version}</version>

    </dependency>

    <!-- Jackson Json处理工具包 -->

    <dependency>

      <groupId>com.fasterxml.jackson.core</groupId>

      <artifactId>jackson-databind</artifactId>

      <version>${jackson.version}</version>

    </dependency>

    <!-- httpclient -->

    <dependency>

      <groupId>org.apache.httpcomponents</groupId>

      <artifactId>httpclient</artifactId>

      <version>${httpclient.version}</version>

    </dependency>

    <!-- 日志处理 -->

    <dependency>

      <groupId>org.slf4j</groupId>

      <artifactId>slf4j-log4j12</artifactId>

      <version>${slf4j.version}</version>

    </dependency>

    <!-- Mybatis -->

    <dependency>

      <groupId>org.mybatis</groupId>

      <artifactId>mybatis</artifactId>

      <version>${mybatis.version}</version>

    </dependency>

    <dependency>

      <groupId>org.mybatis</groupId>

      <artifactId>mybatis-spring</artifactId>

      <version>${mybatis.spring.version}</version>

    </dependency>

    <dependency>

      <groupId>com.github.miemiedev</groupId>

      <artifactId>mybatis-paginator</artifactId>

      <version>${mybatis.paginator.version}</version>

    </dependency>

    <dependency>

      <groupId>com.github.pagehelper</groupId>

      <artifactId>pagehelper</artifactId>

      <version>${pagehelper.version}</version>

    </dependency>

    <!-- MySql -->

    <dependency>

      <groupId>mysql</groupId>

      <artifactId>mysql-connector-java</artifactId>

      <version>${mysql.version}</version>

    </dependency>

    <!-- 连接池 -->

    <dependency>

      <groupId>com.alibaba</groupId>

      <artifactId>druid</artifactId>

      <version>${druid.version}</version>

    </dependency>

    <!-- Spring -->

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-context</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-beans</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-webmvc</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-jdbc</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <dependency>

      <groupId>org.springframework</groupId>

      <artifactId>spring-aspects</artifactId>

      <version>${spring.version}</version>

    </dependency>

    <!-- JSP相关 -->

    <dependency>

      <groupId>jstl</groupId>

      <artifactId>jstl</artifactId>

      <version>${jstl.version}</version>

    </dependency>

    <dependency>

      <groupId>javax.servlet</groupId>

      <artifactId>servlet-api</artifactId>

      <version>${servlet-api.version}</version>

      <scope>provided</scope>

    </dependency>

    <dependency>

      <groupId>javax.servlet</groupId>

      <artifactId>jsp-api</artifactId>

      <version>${jsp-api.version}</version>

      <scope>provided</scope>

    </dependency>

    <!-- 文件上传组件 -->

    <dependency>

      <groupId>commons-fileupload</groupId>

      <artifactId>commons-fileupload</artifactId>

      <version>${commons-fileupload.version}</version>

    </dependency>

    <!-- Redis客户端 -->

    <dependency>

      <groupId>redis.clients</groupId>

      <artifactId>jedis</artifactId>

      <version>${jedis.version}</version>

    </dependency>

    <!-- solr客户端 -->

    <dependency>

      <groupId>org.apache.solr</groupId>

      <artifactId>solr-solrj</artifactId>

      <version>${solrj.version}</version>

    </dependency>

    <!-- 单元测试 -->

    <dependency>

      <groupId>junit</groupId>

      <artifactId>junit</artifactId>

      <version>${junit.version}</version>

      <scope>test</scope>

    </dependency>

  </dependencies>

  <build>

    <!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 -->

    <resources>

      <resource>

        <directory>src/main/java</directory>

        <includes>

          <include>**/*.properties</include>

          <include>**/*.xml</include>

        </includes>

        <filtering>false</filtering>

      </resource>

    </resources>

    <plugins>

      <!-- 资源文件拷贝插件 -->

      <plugin>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-resources-plugin</artifactId>

        <version>2.7</version>

        <configuration>

          <encoding>UTF-8</encoding>

        </configuration>

      </plugin>

      <!-- java编译插件 -->

      <plugin>

        <groupId>org.apache.maven.plugins</groupId>

        <artifactId>maven-compiler-plugin</artifactId>

        <version>3.2</version>

        <configuration>

          <source>1.7</source>

          <target>1.7</target>

          <encoding>UTF-8</encoding>

        </configuration>

      </plugin>

    </plugins>

    <pluginManagement>

      <plugins>

        <!-- 配置Tomcat插件 -->

        <plugin>

          <groupId>org.apache.tomcat.maven</groupId>

          <artifactId>tomcat7-maven-plugin</artifactId>

          <version>2.2</version>

        </plugin>

      </plugins>

    </pluginManagement>

  </build>

</project>

（2）既然是web项目，首先得配置web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xmlns="http://java.sun.com/xml/ns/javaee"

         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

             http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="xuebusi" version="2.5">

    <display-name>xuebusi</display-name>

    <welcome-file-list>

        <welcome-file>index.html</welcome-file>

        <welcome-file>index.htm</welcome-file>

        <welcome-file>index.jsp</welcome-file>

        <welcome-file>default.html</welcome-file>

        <welcome-file>default.htm</welcome-file>

        <welcome-file>default.jsp</welcome-file>

    </welcome-file-list>

    <!-- 加载spring容器 -->

    <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>classpath:spring/applicationContext-*.xml</param-value>

    </context-param>

    <listener>

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

    <!-- 解决post乱码 -->

    <filter>

        <filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

    <!-- springmvc的前端控制器 -->

    <servlet>

        <servlet-name>dispatcherServlet</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <!-- contextConfigLocation不是必须的， 如果不配置contextConfigLocation， springmvc的配置文件默认在：WEB-INF/servlet的name+"-servlet.xml" -->

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>classpath:spring/springmvc.xml</param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>dispatcherServlet</servlet-name>

        <url-pattern>/</url-pattern>

    </servlet-mapping>

</web-app>

（3）数据库连接配置 db.properties

jdbc.driver=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3306/xssm?characterEncoding=utf-8

jdbc.username=root

jdbc.password=root

（4）Mybatis的配置文件 SqlMapConfig.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>

    <!-- 配置分页插件 -->

    <plugins>

        <plugin interceptor="com.github.pagehelper.PageHelper">

            <!-- 设置数据库类型，支持Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六种数据库-->

            <property name="dialect" value="mysql"/>

        </plugin>

    </plugins>

</configuration>

（5）springmvc的配置文件 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:context="http://www.springframework.org/schema/context"

       xmlns:mvc="http://www.springframework.org/schema/mvc"

       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-4.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="com.xuebusi.xssm.controller" />

    <mvc:annotation-driven />

    <bean

        class="org.springframework.web.servlet.view.InternalResourceViewResolver">

        <property name="prefix" value="/WEB-INF/jsp/" />

        <property name="suffix" value=".jsp" />

    </bean>

    <!-- 资源映射 -->

    <mvc:resources location="/WEB-INF/css/" mapping="/css/**"/>

    <mvc:resources location="/WEB-INF/js/" mapping="/js/**"/>

    <!-- 定义文件上传解析器 -->

    <bean id="multipartResolver"

        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">

        <!-- 设定默认编码 -->

        <property name="defaultEncoding" value="UTF-8"></property>

        <!-- 设定文件上传的最大值5MB，5*1024*1024 -->

        <property name="maxUploadSize" value="5242880"></property>

    </bean>

</beans>

（6）Spring的配置文件applicationContext-service.xml 扫描@Service注解

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

       xmlns:context="http://www.springframework.org/schema/context"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

           http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <!-- 扫描包加载Service实现类 -->

    <context:component-scan base-package="com.xuebusi.xssm.service"></context:component-scan>

</beans>

（7）Spring的事物配置 applicationContext-trans.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:tx="http://www.springframework.org/schema/tx"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

        http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

        http://www.springframework.org/schema/aop

        http://www.springframework.org/schema/aop/spring-aop-4.0.xsd

        http://www.springframework.org/schema/tx

        http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    <!-- 事务管理器 -->

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

        <!-- 数据源 -->

        <property name="dataSource" ref="dataSource"/>

    </bean>

    <!-- 通知 -->

    <tx:advice id="txAdvice" transaction-manager="transactionManager">

        <tx:attributes>

            <!-- 传播行为 -->

            <tx:method name="save*" propagation="REQUIRED"/>

            <tx:method name="insert*" propagation="REQUIRED"/>

            <tx:method name="add*" propagation="REQUIRED"/>

            <tx:method name="create*" propagation="REQUIRED"/>

            <tx:method name="delete*" propagation="REQUIRED"/>

            <tx:method name="update*" propagation="REQUIRED"/>

            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>

            <tx:method name="select*" propagation="SUPPORTS" read-only="true"/>

            <tx:method name="get*" propagation="SUPPORTS" read-only="true"/>

        </tx:attributes>

    </tx:advice>

    <!-- 切面 -->

    <aop:config>

        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.xuebusi.xssm.service.*.*(..))"/>

    </aop:config>

</beans>

（8）Spring的数据源配置文件 applicationContext-dao.xml

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

       xmlns:context="http://www.springframework.org/schema/context"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

           http://www.springframework.org/schema/beans/spring-beans-4.0.xsd

        http://www.springframework.org/schema/context

        http://www.springframework.org/schema/context/spring-context-4.0.xsd">

    <!-- 加载配置文件 -->

    <context:property-placeholder location="classpath:resource/*.properties" />

    <!-- 数据库连接池 -->

    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">

        <property name="url" value="${jdbc.url}" />

        <property name="username" value="${jdbc.username}" />

        <property name="password" value="${jdbc.password}" />

        <property name="driverClassName" value="${jdbc.driver}" />

        <property name="maxActive" value="10" />

        <property name="minIdle" value="5" />

    </bean>

    <!-- 配置sqlsessionFactory -->

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

        <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml"></property>

        <property name="dataSource" ref="dataSource"></property>

    </bean>

    <!-- 配置扫描包，加载mapper代理对象 -->

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

        <property name="basePackage" value="com.xuebusi.xssm.mapper"></property>

    </bean>

</beans>

（9）redis配置文件 applicationContext-jedis.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"

       xsi:schemaLocation="http://www.springframework.org/schema/beans

           http://www.springframework.org/schema/beans/spring-beans-4.0.xsd">

    <!-- 连接池配置 -->

    <bean id="jedisPoolConfig" class="redis.clients.jedis.JedisPoolConfig">

        <!-- 最大连接数 -->

        <property name="maxTotal" value="30" />

        <!-- 最大空闲连接数 -->

        <property name="maxIdle" value="10" />

        <!-- 每次释放连接的最大数目 -->

        <property name="numTestsPerEvictionRun" value="1024" />

        <!-- 释放连接的扫描间隔（毫秒） -->

        <property name="timeBetweenEvictionRunsMillis" value="30000" />

        <!-- 连接最小空闲时间 -->

        <property name="minEvictableIdleTimeMillis" value="1800000" />

        <!-- 连接空闲多久后释放, 当空闲时间>该值 且 空闲连接>最大空闲连接数 时直接释放 -->

        <property name="softMinEvictableIdleTimeMillis" value="10000" />

        <!-- 获取连接时的最大等待毫秒数,小于零:阻塞不确定的时间,默认-1 -->

        <property name="maxWaitMillis" value="1500" />

        <!-- 在获取连接的时候检查有效性, 默认false -->

        <property name="testOnBorrow" value="true" />

        <!-- 在空闲时检查有效性, 默认false -->

        <property name="testWhileIdle" value="true" />

        <!-- 连接耗尽时是否阻塞, false报异常,ture阻塞直到超时, 默认true -->

        <property name="blockWhenExhausted" value="false" />

    </bean>

    <!-- jedis客户端单机版 -->

    <!--<bean id="redisClient" class="redis.clients.jedis.JedisPool">

        <constructor-arg name="host" value="localhost"></constructor-arg>

        <constructor-arg name="port" value="6379"></constructor-arg>

        <constructor-arg name="poolConfig" ref="jedisPoolConfig"></constructor-arg>

    </bean>

    <bean id="jedisClient" class="com.xuebusi.xssm.dao.impl.JedisClientSingle"/>-->

    <!-- jedis集群版配置 -->

    <bean id="redisClient" class="redis.clients.jedis.JedisCluster">

        <constructor-arg name="nodes">

            <set>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="192.168.71.13"></constructor-arg>

                    <constructor-arg name="port" value="7001"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="192.168.71.13"></constructor-arg>

                    <constructor-arg name="port" value="7002"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="192.168.71.13"></constructor-arg>

                    <constructor-arg name="port" value="7003"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="192.168.71.13"></constructor-arg>

                    <constructor-arg name="port" value="7004"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="192.168.71.13"></constructor-arg>

                    <constructor-arg name="port" value="7005"></constructor-arg>

                </bean>

                <bean class="redis.clients.jedis.HostAndPort">

                    <constructor-arg name="host" value="192.168.71.13"></constructor-arg>

                    <constructor-arg name="port" value="7006"></constructor-arg>

                </bean>

            </set>

        </constructor-arg>

        <constructor-arg name="poolConfig" ref="jedisPoolConfig"></constructor-arg>

    </bean>

    <bean id="jedisClientCluster" class="com.xuebusi.xssm.dao.impl.JedisClientCluster"></bean>

</beans>

（10）在MySQL中创建一张x_user表

CREATE TABLE `x_user` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `name` varchar(255) DEFAULT NULL,

  `address` varchar(255) DEFAULT NULL,

  `age` int(11) DEFAULT NULL,

  `phone` varchar(255) DEFAULT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

往表里插入几条测试数据：

（11）通过mybatis的逆向工程生成x_user表对应的实体类、接口类、Example类以及Mapper.xml配置文件，具体方法移步另一篇文章《mybatis逆向工程自动生成实体类、接口以及映射Mapper.xml配置文件》，地址：http://www.cnblogs.com/jun1019/p/8073229.html

（12）编写Controller类测试下

package com.xuebusi.xssm.controller;

import com.xuebusi.xssm.pojo.XUser;

import com.xuebusi.xssm.service.XUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.PathVariable;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

/**

 * Created by SYJ on 2017/12/18.

 */

@Controller

@RequestMapping(value = "/user")

public class XUserController {

    @Autowired

    private XUserService userService;

    /**

     * 根据id查询用户

     * @param id

     * @return

     */

    @RequestMapping(value = "/{id}")

    @ResponseBody

    public XUser get(@PathVariable("id") Integer id) {

        return userService.selectByPrimaryKey(id);

    }

    /**

     * 查询所有用户

     * @return

     */

    @RequestMapping(value = "/list")

    @ResponseBody

    public List<XUser> list() {

        return userService.findAll();

    }

    /**

     * 添加用户

     * @return

     */

    @RequestMapping(value = "/add")

    @ResponseBody

    public int insert() {

        XUser user = new XUser();

        user.setName("王五");

        user.setAge(25);

        user.setPhone("13910108899");

        user.setAddress("重庆");

        return userService.insert(user);

    }

}

（13）编写Service接口：

package com.xuebusi.xssm.service;

import com.xuebusi.xssm.pojo.XUser;

import java.util.List;

/**

 * Created by SYJ on 2017/12/18.

 */

public interface XUserService {

    XUser selectByPrimaryKey(Integer id);

    int insert(XUser user);

    List<XUser> findAll();

}

（14）编写Service实现类：

package com.xuebusi.xssm.service.impl;

import com.xuebusi.xssm.mapper.XUserMapper;

import com.xuebusi.xssm.pojo.XUser;

import com.xuebusi.xssm.service.XUserService;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import java.util.List;

/**

 * Created by SYJ on 2017/12/18.

 */

@Service

public class XUserServiceImpl implements XUserService {

    @Autowired

    private XUserMapper userMapper;

    /**

     * 根据id查询用户

     * @param id

     * @return

     */

    @Override

    public XUser selectByPrimaryKey(Integer id) {

        XUser user = userMapper.selectByPrimaryKey(id);

        return user;

    }

    /**

     * 添加用户

     * @param user

     * @return

     */

    @Override

    public int insert(XUser user) {

        return userMapper.insert(user);

    }

    /**

     * 查询所有用户

     * @return

     */

    @Override

    public List<XUser> findAll() {

        return userMapper.selectByExample(null);

    }

}

（15）启动项目，通过浏览器访问下：

本文源码： https://github.com/xuebus/xssm

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