创建web工程
用eclipse或idea创建一个web工程,在这里演示使用idea,项目命名为ssm
建立工程目录框架
根据习惯,简历包目录,分别为
- config
在其中创建两个子包mybatis和spring,分别用来放置spring、mybatis配置文件
- mapper
用来放置mybatis的mapper接口和mapper.xml
- service
service层的javabean
- controller
controller的javabean
- pojo
简单的POJO类
在WEB-INF下建立两个目录
- lib
jar包目录
- views
jsp视图目录
导入jar包
一共需要如下jar包
- spring所有包
- mybatis
- spring-mybatis整合包
- aspectj
- jstl
- log4j
- c3p0
- mysql
百度云下载 链接:http://pan.baidu.com/s/1dDB8cxV 密码:3cqp
添加mybatis配置文件
在config.mybatis下创建mybatis.xml配置文件,SSM整合和mybatis在不需要二级缓存等配置时,mybatis配置文件只需要一个框架,不需要书写具体内容,框架如下
<?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>
</configuration>
添加spring和springmvc配置文件
- springmvc
在config.spring下创建springmvc.xml文件,用来配置springmvc
<?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">
<!--自动扫描controller 加入IOC容器-->
<context:component-scan base-package="com.elin4it.ssm.controller"/>
<!--配置映射器和适配器-->
<mvc:annotation-driven></mvc:annotation-driven>
<!--配置视图渲染类-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--配置物理解析路径-->
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
- applicationContext-dao.xml
在config.spring下创建applicationContext-dao.xml文件,用来配置DAO层的内容,在这里连接数据库的数据源使用C3P0,所以在这之前先在config中添加db.properties来指定数据库连接信息
jdbc.driver = com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://127.0.0.1:3306/mybatis?characterEncoding=UTF-8
jdbc.username = root
jdbc.password = root
applicationContext-dao.xml内容:
<?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">
<!--添加数据库配置文件-->
<context:property-placeholder location="classpath:com/elin4it/ssm/config/db.properties"/>
<!--设置数据源c3p0-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="maxPoolSize" value="50"/>
<property name="minPoolSize" value="5"/>
<property name="maxIdleTime" value="60"/>
</bean>
<!--配置sqlsessionFactory-->
<bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
<!--配置mybatis配置文件-->
<property name="configLocation" value="classpath:com/elin4it/ssm/config/mybaits/SqlMapConfig.xml"/>
<!--配置数据源-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!--配置自动扫描mapper,将mapper接口加入到IOC容器-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com/elin4it/ssm/mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSession"/>
</bean>
</beans>
- applicationContext-service.xml
在config.spring中添加applicationContext-service.xml,用来把service层的javabean注入到IOC容器中
<?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">
<!--将service加入到IOC容器-->
<context:component-scan base-package="com.elin4it.ssm.service"/>
</beans>
- applicationContext-transtion.xml
在config.spring中添加applicationContext-transtion.xml,用来配置AOP事务
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="find*" propagation="REQUIRED"/>
<tx:method name="add*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
</tx:attributes>
</tx:advice>
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.elin4it.ssm.service.*.*(..))"/>
</aop:config>
</beans>
添加log4j配置文件
为了方便mybatis的调试,使用log4j作为日志输出,在src根目录中添加log4j.properties
log4j.rootLogger=DEBUG,Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.org.apache=INFO
修改web.xml文件
web.xml需要实现三个功能
- 配置spring文件
<!--设置spring 配置文件的位置-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:cn/elinzhou/OrderSpringMVC/config/spring/applicationContext-*.xml</param-value>
</context-param>
<!--配置spring listener-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
- 配置springmvc中的前端控制器
<!--配置springmvc-->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<!--springmvc配置文件位置-->
<param-value>classpath:cn/elinzhou/OrderSpringMVC/config/spring/springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
- 解决post乱码问题
<!--解决POST乱码问题-->
<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>
创建pojo类
这里使用一张用户表做示例,表结构如下
DROP TABLE IF EXISTS `user`;
/*!40101 SET @saved_cs_client = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `user` (
`id` int(11) NOT NULL auto_increment,
`username` varchar(32) NOT NULL COMMENT ‘用户名称‘,
`sex` char(1) default NULL COMMENT ‘性别‘,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=31 DEFAULT CHARSET=utf8;
根据表结构建立POJO类
package cn.elinzhou.OrderSpringMVC.pojo;
import java.util.Date;
public class User {
private Integer id;
private String username;
private String sex;
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 getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex == null ? null : sex.trim();
}
}
创建mapper接口和mapper.xml
mapper.java
package com.elin4it.ssm.mapper;
import com.elin4it.ssm.pojo.User;
import java.util.List;
public interface UserMapper {
//查询用户列表
List<User> findUser() throws Exception;
}
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.elin4it.ssm.mapper.UserMapper" >
<select id="findUser" resultMap="com.elin4it.ssm.pojo.User">
select
id, username, birthday, sex, address
from user
</select>
</mapper>
创建service接口和实现
创建一个service接口,添加一个方法,用来查询所用用户
UserService.java
package com.elin4it.ssm.service;
import com.elin4it.ssm.pojo.User;
import java.util.List;
/**
* Created by elin on 15-7-1.
*/
public interface UserService {
List<User> findUser()throws Exception;
}
添加UserService的实现类UserServiceImpl.java
package com.elin4it.ssm.service;
import com.elin4it.ssm.mapper.UserMapper;
import com.elin4it.ssm.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* Description: UserServiceImpl
* Author: Elin Zhou
* Create: 2015-07-01 20:59
*/
@Service
public class UserServiceImpl implements UserService {
//自动注入mapper接口
@Autowired
private UserMapper userMapper;
@Override
public List<User> findUser() throws Exception {
//调用mapper接口中的方法,获取用户列表
List<User> users = userMapper.findUser();
return users;
}
}
创建controller
创建后端控制器,前端控制器根据用户请求映射到后端控制器中的方法,并且返回视图和数据来渲染视图
package com.elin4it.ssm.controller;
import com.elin4it.ssm.pojo.User;
import com.elin4it.ssm.service.UserService;
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 java.util.List;
import java.util.Map;
/**
* Description: UserController
* Author: Elin Zhou
* Create: 2015-07-01 19:30
*/
@Controller
@RequestMapping("/user")
public class UserController {
//自动注入service
@Autowired
private UserService userService;
@RequestMapping("/findUser")
public String findUser(Map<String,Object> map) throws Exception{
//调用service中的查询用户列表方法来获取用户列表
List<User> users = userService.findUser();
//把用户列表放到形参传入的map中,相当于执行request.addAttribute()方法
map.put("users",users);
return "user/userList";
}
}
创建对应的jsp页面
在WEB-INF的views文件夹中添加user文件加,用来存放用户相关的视图,在添加一个userList.jsp文件
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
Created by IntelliJ IDEA.
User: elin
Date: 15-7-1
Time: 下午8:53
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title></title>
</head>
<body>
<h1>userList</h1>
<table>
<tr><td>id</td><td>username</td><td>sex</td></tr>
<c:forEach items="${users}" var="i">
<tr>
<td>${i.id}</td>
<td>${i.username}</td>
<td>${i.sex}</td>
</tr>
</c:forEach>
</table>
</body>
</html>
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