环境 spring+spring mvc+mybatis+maven 项目整合（ssm框架整合） 2016年4月30日
环境
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ssm框架整合。具体流程：

  1. 先整合spring + mybatis。
  2. 整合完成后测试。
  3. 正常就去整合spring mvc。
  4. 最后再进行测试。

从零开始项目，我们来做一个简单的登录实例。

一、项目结构

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二、环境配置

（1）首先是根据需求设计数据库

  1. 有人习惯先设计接口，再根据接口设计数据库，这是接口驱动模式。
  2. 也有人习惯先设计测试用例，再设计接口，再设计数据库，这是测试驱动模式。

我这里先设计数据库，只是为了演示，真正的开发流程还是从接口开始比较好。

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（2）根据数据库生成mybatis代码

使用mybatis generator，生成相应文件。

应该有三个文件：

  1. dao中的mapper文件：userMapper.java。
  2. 对应mapper的sql语句配置文件：userMapper.xml。
  3. pojo：user.java。

dao中的mapper文件：

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package com.xie.dao;
 
import com.xie.pojo.user;
 
public interface userMapper {
    int deleteByPrimaryKey(Integer id);
 
    int insert(user record);
 
    int insertSelective(user record);
 
    user selectByPrimaryKey(Integer id);
 
    int updateByPrimaryKeySelective(user record);
 
    int updateByPrimaryKey(user record);
    
    user login(user user);
}

我加上了login这个映射方法。

对应mapper的sql语句配置文件userMapper.xml：

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<?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.xie.dao.userMapper" >
  <resultMap id="BaseResultMap" type="com.xie.pojo.user" >
    <id column="id" property="id" jdbcType="INTEGER" />
    <result column="username" property="username" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
  </resultMap>
  <sql id="Base_Column_List" >
    id, username, password
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select
    <include refid="Base_Column_List" />
    from user
    where id = #{id,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete from user
    where id = #{id,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.xie.pojo.user" >
    insert into user (id, username, password
      )
    values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}
      )
  </insert>
  <insert id="insertSelective" parameterType="com.xie.pojo.user" >
    insert into user
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        id,
      </if>
      <if test="username != null" >
        username,
      </if>
      <if test="password != null" >
        password,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        #{id,jdbcType=INTEGER},
      </if>
      <if test="username != null" >
        #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        #{password,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.xie.pojo.user" >
    update user
    <set >
      <if test="username != null" >
        username = #{username,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        password = #{password,jdbcType=VARCHAR},
      </if>
    </set>
    where id = #{id,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.xie.pojo.user" >
    update user
    set username = #{username,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR}
    where id = #{id,jdbcType=INTEGER}
  </update>
  <select id="login" parameterType="com.xie.pojo.user" resultType="com.xie.pojo.user">
   select * from user where username = #{username} and password = #{password}
  </select>
</mapper>

在sql语句配置文件中加上login方法映射的sql语句。

相应的pojo：

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package com.xie.pojo;
 
public class user {
 
    private Integer id;
 
    private String username;
 
    private String password;
 
    public Integer getId() {
        return id;
    }
 
    public void setId(Integer id) {
        this.id = id;
    }
 
    public String getUsername() {
        return username;
    }
 
    public void setUsername(String username) {
        this.username = username == null ? null : username.trim();
    }
 
    public String getPassword() {
        return password;
    }
 
    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }
 
@Override
public String toString() {
return "user [id=" + id + ", username=" + username + ", password=" + password + "]";
}
}

为了显示类比较方便，我加了toString()方法。

（3）建立Maven项目

  1. 在library中加入runtime环境，解决报错。
  2. 在Project Facets中更改各种版本信息，比如java改成你安装的版本，动态网页版本改成3.0，如果eclipse中无法修改，那么就找到项目所在目录，更改org.eclipse.wst.common.project.facet.core.xml文件。
  3. 建立相关包，把刚才generator生成的文件放进去。

（4）配置pom.xml文件

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<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.2.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.3.1</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.18</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<dependency>
<groupId>aopalliance</groupId>
<artifactId>aopalliance</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.9</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.6.2</version>
<scope>system</scope>
<!--本地jar的路径,相对或者绝对都可以 -->
<systemPath>E:\谢宏滔\方法记忆\常用包\gson-2.6.2.jar</systemPath>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-juli</artifactId>
<version>7.0.65</version>
</dependency>
</dependencies>

这里的依赖基本上够用了，有一些是没必要加的，可以进行删改。

到这一步，环境基本上就配置好了。接下来是重头戏。

二、先整合spring和mybatis

先整合spring和mybatis。

（1）配置spring配置文件spring.xml

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<?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-4.2.xsd">
 
<context:component-scan base-package="com.xie.service"></context:component-scan>
</beans>

因为等下我们要写一个服务类service，需要放进spring ioc容器中，所以只是配置了一个自动扫描注解类。

（2）配置spring与mybatis的整合文件spring-mybatis.xml

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<?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-4.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">
 
<!-- 1.数据源: DriverManagerDataSource -->
<bean name="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/test"></property>
<property name="username" value="root"></property>
<property name="password" value="root"></property>
</bean>
 
<!-- 2.mybatis的SqlSession 的工厂: SqlSessionFactoryBean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="mapperLocations" value="classpath:com/xie/mapper/*.xml"></property>
</bean>
 
<!-- 3.mybatis自动扫描加载Sql 映射文件 : MapperScannerConfigurer -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.xie.dao" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
 
<!-- 4.事务管理: DataSourceTransactionManager -->
<bean id="txManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
 
<!-- 5.使用声明式事务 -->
<tx:annotation-driven transaction-manager="txManager" />
 
</beans>

这个是整合的核心。

这样，spring和mybatis的整合就基本完成了。下面进行测试。

（3）写测试方法

1.创建一个service包

2.写一个接口userservice.java

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package com.xie.service;
 
import com.xie.pojo.user;
 
public interface userservice {
user login(user user);
}

（3）写一个实现类userserviceimpl.java

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package com.xie.service;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
 
import com.xie.dao.userMapper;
import com.xie.pojo.user;
 
@Service("userservice")
public class userserviceimpl implements userservice {
@Autowired
private userMapper userMapper;
 
public user login(user user) {
return userMapper.login(user);
}
}

（4）写一个测试类test.java

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package com.xie;
 
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
import com.xie.pojo.user;
import com.xie.service.userservice;
 
public class test {
 
private userservice userservice;
@Test
public void test(){
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(new String[]{"spring/spring.xml","spring/spring-mybatis.xml"});
userservice = (com.xie.service.userservice) applicationContext.getBean("userservice");
user user = new user();
user.setUsername("yxin");
user.setPassword("456");
user result = userservice.login(user);
System.out.println(result.toString());
}
}

如果查询错误，就要具体问题具体解决了，其实这步才是最繁琐的。

如果能正确查询出这个类，就说明spring和mybatis已经整合完成。

三、整合spring mvc

一定要在上面的步骤都完成之后，最后才来整合spring mvc。

（1）首先配置web.xml

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<!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>
 
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:/spring/spring.xml,classpath:/spring/spring-mybatis.xml</param-value>
</context-param>
 
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>springDispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
 
<servlet-mapping>
<servlet-name>springDispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>default</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
</web-app>

最重要的是设置监听器，从而在spring mvc启动时加载spring.xml和spring-mybatis.xml配置文件。

（2）配置spring-mvc.xml

用于spring mvc找controller。

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<?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-4.2.xsd">
 
<context:component-scan base-package="com.xie.controller"></context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>

因为controller用的是@ResponseBody，所以不需要用到视图解析器，这里还是配了。

（3）写一个控制器

新建一个controller包，写一个控制器类login.java：

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package com.xie.controller;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
 
import com.xie.pojo.user;
import com.xie.service.userservice;
 
@Controller
public class login {
@ResponseBody
@RequestMapping(value = "/login", method = RequestMethod.GET, params = {"username","password"})
public String login(user user){
ApplicationContext applicationContext = new ClassPathXmlApplicationContext(new String[]{"spring/spring.xml","spring/spring-mybatis.xml"});
userservice userservice = (com.xie.service.userservice) applicationContext.getBean("userservice");
if (userservice.login(user) != null) {
return "success";
} else{
return "fail";
}
}
}

需要手动去从ioc容器中获取userservice类。

或者@Autowired注入userservice实现类也可以：

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package com.xie.controller;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
 
import com.xie.pojo.user;
import com.xie.service.userservice;
 
@Controller
public class login {
 
@Autowired
userservice userservice;
 
@ResponseBody
@RequestMapping(value = "/login", method = RequestMethod.GET, params = { "username", "password" })
public String login(user user){
if (userservice.login(user) != null) {
return "success";
}else {
return "fail";
}
}
}

（4）进行测试

访问：http://localhost:8080/5.7springmvc/login?username=xie&password=123

1

那就是成功了。至此ssm框架整合完成。

（5）加强细节

  1. get请求变成post。
  2. 写个html页面进行ajax获取。
  3. …

四、总结

总之，先整合spring + mybatis，整合完成后测试，正常就去整合spring mvc，最后再进行测试。

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