SpringMVC4+MyBatis3+SQLServer 2014 整合（包括增删改查分页）

前言

      说起整合自然离不开ssm，我本身并不太喜欢ORM,尤其是MyBatis，把SQL语句写在xml里，尤其是大SQL，可读性不高，出错也不容易排查。

开发环境

      idea2016、SpringMVC4、Mybatis3

项目结构

SSM整合

1、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.autohome</groupId>
  <artifactId>SpringMVC3</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>SpringMVC3</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.10</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>4.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>4.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.apache.velocity</groupId>
      <artifactId>velocity</artifactId>
      <version>1.6.2</version>
    </dependency>
    <dependency>
      <groupId>org.apache.velocity</groupId>
      <artifactId>velocity-tools</artifactId>
      <version>2.0</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.2</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>
    <dependency>
      <groupId>com.microsoft.sqlserver</groupId>
      <artifactId>sqljdbc4</artifactId>
      <version>4.0</version>
    </dependency>
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>SpringMVC3</finalName>
  </build>
</project>

2、web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
  <!--告知javaEE容器，有那些内容需要添加到上下文里去-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--spring 前端控制器-->
  <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc-servlet.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

3、applicationContext.xml无配置内容所以忽略

4、springmvc-servlet.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
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
">

    <!--从配置文件加载数据库信息-->
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations" value="classpath:config/jdbc.properties"/>
        <property name="fileEncoding" value="UTF-8"/>
    </bean>

    <!--配置数据源，这里使用Spring默认-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${sqlserver.driver}"/>
        <property name="url" value="${sqlserver.url}"/>
        <property name="username" value="${sqlserver.username}"/>
        <property name="password" value="${sqlserver.password}"/>
    </bean>

    <!--扫描Mapper-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.autohome.mapper"/>

    </bean>

    <!--配置sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="configLocation" value="classpath:springmvc-mybatis.xml"/>
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--启用最新的注解器、映射器-->
    <mvc:annotation-driven/>

    <!--扫描Controller注解类-->
    <context:component-scan base-package="com.autohome.controller" />
    <!--扫描Service注解类-->
    <context:component-scan base-package="com.autohome.service"/>

    <!--配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

</beans>

5、springmvc-mybatis.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>

    <!-- 实体类,简称 -设置别名 -->
    <typeAliases>
        <typeAlias alias="User" type="com.autohome.model.User" />
    </typeAliases>


    <mappers>
        <mapper resource="mapper/UserMapper.xml" />
    </mappers>

</configuration>

6、dao接口层、mapper（dao接口实现层）、Biz层、 model层忽略不计(id,name,address3个测试字段)。 mapper文件让我踩了坑，后恍然大悟，mapper.xml要放在resources包下。

public interface UserMapper {
    List<User> listAllUser();
    List<User> listPagedUser(@Param("pageIndex") int pageIndex,@Param("pageSize") int pageSize);
    int count();
    int updateUser(User user);
    int deleteUser(int id);
    int insertUser(User user);
    User getUserById(int id);

}

<?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">
<!--命名空间和接口保持一致-->
<mapper namespace="com.autohome.mapper.UserMapper">
    <select id="listAllUser" resultType="User">
        select * from t_userinfo
    </select>

    <select id="listPagedUser"   resultType="User">
        select top ${pageSize} * from t_userinfo where id not in (select top (${pageSize} * (${pageIndex} -1)) id from t_userinfo)
    </select>

    <select id="count" resultType="int">
        select count(*) from t_userinfo
    </select>

    <insert id="insertUser" parameterType="User">
        insert into t_userinfo VALUES (#{name},#{address})
    </insert>

    <update id="updateUser" parameterType="User">
        UPDATE  t_userinfo set name=#{name},address=#{address} where id=#{id}
    </update>

    <delete id="deleteUser" parameterType="int">
        DELETE FROM t_userinfo where id=#{id}
    </delete>

    <select id="getUserById" resultType="User" parameterType="int">
        select * from t_userinfo where id=#{id}
    </select>

</mapper>

 */
public interface IUserBiz {
    List<User> listAllUser();
    List<User> listPagedUser(@Param("pageIndex") int pageIndex, @Param("pageSize") int pageSize);
    int count();
    int updateUser(User user);
    int deleteUser(int id);
    int insertUser(User user);
    User getUserById(int id);
}

package com.autohome.service;

import com.autohome.model.User;
import com.autohome.mapper.UserMapper;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Map;


@Service
public class UserBizImpl implements IUserBiz {

    @Autowired
    private UserMapper userMapper;

    public List<User> listAllUser() {
        return userMapper.listAllUser();
    }

    public List<User> listPagedUser(@Param("pageIndex") int pageIndex,@Param("pageSize") int pageSize) {
        return userMapper.listPagedUser(pageIndex,pageSize);
    }

    public int count() {
        return userMapper.count();
    }

    public int updateUser(User user) {
        return userMapper.updateUser(user);
    }

    public int deleteUser(int id) {
        return userMapper.deleteUser(id);
    }

    public int insertUser(User user) {
        return userMapper.insertUser(user);
    }

    public User getUserById(int id) {
        return userMapper.getUserById(id);
    }
}

7、Controller。 我新建了一个UserController，在这里调用了增删改查分页的操作

package com.autohome.controller;

import com.autohome.service.IUserBiz;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.autohome.model.User;


@Controller
@RequestMapping("/User")
public class UserController {

    @Autowired
    private IUserBiz userBiz;

    @RequestMapping("/index")
    public ModelAndView index(){
        //System.out.println("size:"+userBiz.listAllUser().size());

        System.out.println("size:"+userBiz.count());
//
//        User user =new User();
//        user.setName("张三");
//        user.setAddress("shanxi");
//
//        int result = userBiz.insertUser(user);
//        if(result>0)
//        {
//            System.out.println("insert success");
//        }else{
//            System.out.println("insert err");
//        }

        int result = userBiz.deleteUser(39);
        if(result>0)
        {
            System.out.println("delete success");
        }else{
            System.out.println("delete err");
        }

//        User user =new User();
//        user.setId(35);
//        user.setName("张三11111");
//        user.setAddress("china");
//
//        int result = userBiz.updateUser(user);
//        if(result>0)
//        {
//            System.out.println("update success");
//        }else{
//            System.out.println("update err");
//        }


        //System.out.println("size:"+userBiz.listPagedUser(1,10).size());



        ModelAndView mav=new ModelAndView("index");

        return mav;
    }
}

　　

总结

      做这个demo前我看的ssm整合教程全部是基于myeclipse开发的，而且教程把dao接口和dao实现是全部放在src java目录下的，也就是mapper目录包括了mapper接口和mapper.xml。 我做第一个demo时在idea里也是这么做的，demo运行始终不成功，一直提示找不 到mapper.xml里的方法，后来编译的时候我发现target/classes里确实找不到mapper.xml。 不知道用myeclipse整合开发时是否遇到这个问题，后我把mapper.xml文件放到resources目录中，编译后target文件总就能找到mapper.xml。 方法运行也搞定了。写demo写了半个小时，debug这个问题花了2个小时，好在demo跑起来了，也算是有收获的。

参考

http://www.cnblogs.com/hellokitty1/p/5230392.html

http://www.cnblogs.com/lin557/p/6179618.html