SSM-1: A Java repository from CRayFish07

#SSM 框架构建

整合最优雅SSM框架 SpringMVC + Spring + MyBatis

我们看招聘信息的时候，经常会看到这一点，需要具备SSH框架的技能；而且在大部分教学课堂中，也会把SSH作为最核心的教学内容。但是，我们在实际应用中发现，SpringMVC可以完全替代Struts，配合注解的方式，编程非常快捷，而且通过restful风格定义url，让地址看起来非常优雅。另外，MyBatis也可以替换Hibernate，正因为MyBatis的半自动特点，我们程序猿可以完全掌控SQL，这会让有数据库经验的程序猿能开发出高效率的SQL语句，而且XML配置管理起来也非常方便。

三个框架作用 1.SpringMVC：它用于web层，相当于controller（等价于传统的servlet和struts的action），用来处理用户请求。举个例子，用户在地址栏输入http://网站域名/login，那么springmvc就会拦截到这个请求，并且调用controller层中相应的方法，（中间可能包含验证用户名和密码的业务逻辑，以及查询数据库操作，但这些都不是springmvc的职责），最终把结果返回给用户，并且返回相应的页面（当然也可以只反馈josn/xml等格式数据）。springmvc就是做前面和后面过程的活，与用户打交道！！

2.Spring：太强大了，以至于我无法用一个词或一句话来概括它。但与我们平时开发接触最多的估计就是IOC容器，它可以装载bean（也就是我们java中的类，当然也包括service dao里面的），有了这个机制，我们就不用在每次使用这个类的时候为它初始化，很少看到关键字new。另外spring的aop，事务管理等等都是我们经常用到的。

3.MyBatis：如果你问我它跟鼎鼎大名的Hibernate有什么区别？我只想说，他更符合我的需求。第一，它能自由控制sql，这会让有数据库经验的人（当然不是说我啦捂脸）编写的代码能搞提升数据库访问的效率。第二，它可以使用xml的方式来组织管理我们的sql，因为一般程序出错很多情况下是sql出错，别人接手代码后能快速找到出错地方，甚至可以优化原来写的sql。

SSM框架整合配置

包名	名称	作用
dao	数据访问层（接口）	与数据打交道，可以是数据库操作，也可以是文件读写操作，甚至是redis缓存操作，总之与数据操作有关的都放在这里，也有人叫做dal或者数据持久层都差不多意思。为什么没有daoImpl，因为我们用的是mybatis，所以可以直接在配置文件中实现接口的每个方法。
entity	实体类	一般与数据库的表相对应，封装dao层取出来的数据为一个对象，也就是我们常说的pojo，一般只在dao层与service层之间传输。
dto	数据传输层	刚学框架的人可能不明白这个有什么用，其实就是用于service层与web层之间传输，为什么不直接用entity（pojo）？其实在实际开发中发现，很多时间一个entity并不能满足我们的业务需求，可能呈现给用户的信息十分之多，这时候就有了dto，也相当于vo，记住一定不要把这个混杂在entity里面，答应我好吗？
service	业务逻辑（接口）	写我们的业务逻辑，也有人叫bll，在设计业务接口时候应该站在“使用者”的角度。额，不要问我为什么这里没显示！IDE调皮我也拿它没办法~
serviceImpl	业务逻辑（实现）	实现我们业务接口，一般事务控制是写在这里，没什么好说的。
controller	控制器	springmvc就是在这里发挥作用的，一般人叫做controller控制器，相当于struts中的action。

使用maven进行项目管理

##（一）集成springmvc-

1.在pom.xml添加 spring -mvc 的库

    <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>ssm</groupId>
	<artifactId>SSM</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>SSM</name>
	<url>http://maven.apache.org</url>
	<properties>
		<spring.version>3.2.12.RELEASE</spring.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>

		<!-- Spring -->
		<!-- Spring核心 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</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-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- Spring web -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>


		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.2</version>
		</dependency>

		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>SSM</finalName>
	</build>
</project>

2.修改web.xml 添加 spring -mvc 支持

    <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" metadata-complete="true">
	<!-- 如果是用mvn命令生成的xml，需要修改servlet版本为3.1 -->
	<!-- 配置DispatcherServlet -->
	<servlet>
		<servlet-name>mvc-dispatcher</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- 配置springMVC需要加载的配置文件
		      spring-mvc
		 -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring/spring-*.xml</param-value>
		</init-param>
	</servlet>
	<servlet-mapping>
		<servlet-name>mvc-dispatcher</servlet-name>
		<!-- 默认匹配所有的请求 -->
		<url-pattern>/</url-pattern>
	</servlet-mapping>
</web-app>

3. 在 src/main/resources/ 下添加spring 文件夹，添加spring-mvc.xml

    <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/context
	http://www.springframework.org/schema/context/spring-context.xsd
	http://www.springframework.org/schema/mvc
	http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
	<!-- 配置SpringMVC -->
	<!-- 1.开启SpringMVC注解模式 -->
	<!-- 简化配置： 
		(1)自动注册DefaultAnootationHandlerMapping,AnotationMethodHandlerAdapter 
		(2)提供一些列：数据绑定，数字和日期的format @NumberFormat, @DateTimeFormat, xml,json默认读写支持 
	-->
	<mvc:annotation-driven />
	
	<!-- 2.静态资源默认servlet配置
		(1)加入对静态资源的处理：js,gif,png
		(2)允许使用"/"做整体映射
	 -->
	 <mvc:default-servlet-handler/>
	 
	 <!-- 3.配置jsp 显示ViewResolver -->
	 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
	 	<property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
	 	<property name="prefix" value="/WEB-INF/jsp/" />
	 	<property name="suffix" value=".jsp" />
	 </bean>
	 
	 <!-- 4.扫描controller相关的bean -->
	 <context:component-scan base-package="com.ssm" />
</beans>

4 在src/main/java 下添加package con.ssm.controller; 新建 HomeController.java

package com.ssm.controller;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class HomeController {

	@RequestMapping(value = "/home")
	public String home(Model model){
		System.out.println("home");
		model.addAttribute("home", "home");
		return "home";
	}
}

5.在WEB-INF 添加jsp文件夹，添加home.jsp

<html>
<body>
<h2>home!</h2>
</body>
</html>

这样基本上的spring-mvc框架就构建成功了

##（二） spring—mvc集成Mybatis

1.在pom.xml 中添加 mysql-connector-java mybatis mybatis-spring spring-jdbc spring-tx

<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>ssm</groupId>
	<artifactId>SSM</artifactId>
	<packaging>war</packaging>
	<version>0.0.1-SNAPSHOT</version>
	<name>SSM</name>
	<url>http://maven.apache.org</url>

	<properties>
		<spring.version>3.2.12.RELEASE</spring.version>
		<jdbc.version>5.1.37</jdbc.version>
		<mybatis.version>3.3.0</mybatis.version>
		<mybatis-spring.version>1.2.3</mybatis-spring.version>
	</properties>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<!-- mysql 连接 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>5.1.6</version>
		</dependency>

		<!-- mybatis -->

		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.2.4</version>
		</dependency>

		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis-spring</artifactId>
			<version>1.2.5</version>
		</dependency>
		<!-- druid 数据库连接池 -->
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>druid</artifactId>
			<version>1.0.14</version>
		</dependency>
		<!-- 4.Spring -->
		<!-- 1)Spring核心 -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</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-context</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<!-- Spring web -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>

		<!-- Spring dao -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${spring.version}</version>
		</dependency>
		<dependency>
			<groupId>commons-logging</groupId>
			<artifactId>commons-logging</artifactId>
			<version>1.2</version>
		</dependency>

		<dependency>
			<groupId>javax.servlet</groupId>
			<artifactId>jstl</artifactId>
			<version>1.2</version>
		</dependency>
	</dependencies>
	<build>
		<finalName>SSM</finalName>
	</build>
</project>

2.添加jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=....1234

3.添加 spring-service.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: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">
	<!-- 扫描service包下所有使用注解的类型 -->
	<context:component-scan base-package="com.ssm" />
	<!-- 配置事务管理器 -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<!-- 注入数据库连接池 -->
		<property name="dataSource" ref="dataSource" />
	</bean>

	<!-- 配置基于注解的声明式事务 -->
	<tx:annotation-driven transaction-manager="transactionManager" />
</beans>

4.添加spring-dao.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"
	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">
	<!-- 配置整合mybatis过程 -->
	<!-- 1.配置数据库相关参数properties的属性：${url} -->
	<context:property-placeholder location="classpath:jdbc.properties" />
	
	<!-- 2.数据库连接池 -->
	  <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> 
      <!-- 基本属性 url、user、password -->
      <property name="url" value="${jdbc.url}" />
      <property name="username" value="${jdbc.username}" />
      <property name="password" value="${jdbc.password}" />

      <!-- 配置初始化大小、最小、最大 -->
      <property name="initialSize" value="1" />
      <property name="minIdle" value="1" /> 
      <property name="maxActive" value="20" />

      <!-- 配置获取连接等待超时的时间 -->
      <property name="maxWait" value="60000" />

      <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
      <property name="timeBetweenEvictionRunsMillis" value="60000" />

      <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
      <property name="minEvictableIdleTimeMillis" value="300000" />

      <property name="validationQuery" value="SELECT 'x'" />
      <property name="testWhileIdle" value="true" />
      <property name="testOnBorrow" value="false" />
      <property name="testOnReturn" value="false" />

      <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
      <property name="poolPreparedStatements" value="false" />
      <property name="maxPoolPreparedStatementPerConnectionSize" value="20" />

      <!-- 配置监控统计拦截的filters -->
      <property name="filters" value="stat" /> 
  </bean>
  
  <!-- 3.配置SqlSessionFactory对象 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 注入数据库连接池 -->
		<property name="dataSource" ref="dataSource" />
		<!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
		<property name="configLocation" value="classpath:mybatis-config.xml" />
		<!-- 扫描entity包 使用别名 -->
		<property name="typeAliasesPackage" value="com.ssm.entity" />
		<!-- 扫描sql配置文件:mapper需要的xml文件 -->
		<property name="mapperLocations" value="classpath:mapper/*.xml" />
	</bean>
  
  <!-- 4.配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 注入sqlSessionFactory -->
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
		<!-- 给出需要扫描Dao接口包 -->
		<property name="basePackage" value="com.ssm.dao" />
	</bean>
</beans>

5.添加mmybatis-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>
	<!-- 配置全局属性 -->
	<settings>
		<!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->
		<setting name="useGeneratedKeys" value="true" />

		<!-- 使用列别名替换列名 默认:true -->
		<setting name="useColumnLabel" value="true" />

		<!-- 开启驼峰命名转换:Table{create_time} -> Entity{createTime} -->
		<setting name="mapUnderscoreToCamelCase" value="true" />
	</settings>
</configuration>

6.安装mybatis generator 插件 http://mybatis.googlecode.com/svn/sub-projects/generator/trunk/eclipse/UpdateSite/ 7.本地数据库 ssm.sql

/*
Navicat MySQL Data Transfer

Source Server         : host
Source Server Version : 50631
Source Host           : localhost:3306
Source Database       : ssm

Target Server Type    : MYSQL
Target Server Version : 50631
File Encoding         : 65001

Date: 2016-07-21 18:38:36
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for user
-- ----------------------------
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(11) NOT NULL,
  `name` varchar(255) DEFAULT NULL,
  `password` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', '小明', '1234');

一个user表

8.运行generator 产生 User 的entity UserMapper 和UserMapper.xml

    
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);
}

package com.ssm.entity;

public class User {

    private Integer id;


    private String name;


    private String password;


    public Integer getId() {
        return id;
    }


    public void setId(Integer id) {
        this.id = id;
    }


    public String getName() {
        return name;
    }


    public void setName(String name) {
        this.name = name == null ? null : name.trim();
    }


    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }
}

Mapper.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.ssm.dao.UserMapper" >
  <resultMap id="BaseResultMap" type="com.ssm.entity.User" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    <id column="id" property="id" jdbcType="INTEGER" />
    <result column="name" property="name" jdbcType="VARCHAR" />
    <result column="password" property="password" jdbcType="VARCHAR" />
  </resultMap>
  <sql id="Base_Column_List" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    id, name, password
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    select 
    <include refid="Base_Column_List" />
    from user
    where id = #{id,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    delete from user
    where id = #{id,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.ssm.entity.User" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    insert into user (id, name, password
      )
    values (#{id,jdbcType=INTEGER}, #{name,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}
      )
  </insert>
  <insert id="insertSelective" parameterType="com.ssm.entity.User" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    insert into user
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        id,
      </if>
      <if test="name != null" >
        name,
      </if>
      <if test="password != null" >
        password,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="id != null" >
        #{id,jdbcType=INTEGER},
      </if>
      <if test="name != null" >
        #{name,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        #{password,jdbcType=VARCHAR},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.ssm.entity.User" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    update user
    <set >
      <if test="name != null" >
        name = #{name,jdbcType=VARCHAR},
      </if>
      <if test="password != null" >
        password = #{password,jdbcType=VARCHAR},
      </if>
    </set>
    where id = #{id,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.ssm.entity.User" >
    <!--
      WARNING - @mbggenerated
      This element is automatically generated by MyBatis Generator, do not modify.
      This element was generated on Thu Jul 21 14:13:20 CST 2016.
    -->
    update user
    set name = #{name,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR}
    where id = #{id,jdbcType=INTEGER}
  </update>
</mapper>

9.添加UserService.java UserServiceImpl.java

package com.ssm.controller;
import javax.annotation.Resource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.ssm.entity.User;
import com.ssm.service.UserService;

@Controller
public class HomeController {

    @Autowired
    private UserService userService = null;  
    
	@RequestMapping(value = "/home")
	public String home(Model model){
	
		model.addAttribute("home", "home");
		User user = userService.findUser(1);
		System.out.println(user.getName());
		return "home";
	}
}

    package com.ssm.service.impl;

import java.util.List;

import javax.annotation.Resource;

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

import com.ssm.dao.UserMapper;
import com.ssm.entity.User;
import com.ssm.service.UserService;



@Service("userService")
public class UserServiceImpl implements UserService {

	@Autowired 
	private UserMapper dao;

	public User findUser(int id) {
		// TODO Auto-generated method stub
		User user = dao.selectByPrimaryKey(id);
		return user;
	}
}

10.最后在UserController 进行测试

package com.ssm.controller;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import com.ssm.entity.User;
import com.ssm.service.UserService;

@Controller
public class HomeController {

    @Autowired
    private UserService userService = null;  
    
	@RequestMapping(value = "/home")
	public String home(Model model){
	
		model.addAttribute("home", "home");
		User user = userService.findUser(1);
		System.out.println(user.getName());
		return "home";
	}
}

到此 MyBatis的整合就完成了

CRayFish07/SSM-1

#SSM 框架构建