本教程基于Mybatis官方示例!通俗易懂、老少皆宜、不论男女!---叨、校长
废话不多说,直接上实例教程:
1、新建一个Web Project(这个大家会吧!)---我的项目名称:SSM
2、添加相应的JAR支持详情见附件(Spring包能精简,大家自己去精简,这里全部为了方便全部加入了);
3、编写实体bean,jdbc.properties文件
UserBean.java
package com.daodao.bean; public class UserBean { public String name; public String pass; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getPass() { return pass; } public void setPass(String pass) { this.pass = pass; } }
jdbc.properties文件:
jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=GBK jdbc.username=root jdbc.password=abc123
4、配置web.xml文件,让项目支持Spring;
<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> <!-- 配置spring的监听器 --> <!-- 指明spring配置文件的位置 --> <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> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
5、配置MyBatis配置文件--mybatis-config.xml;
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//ibatis.apache.org//DTD Config 3.0//EN" "http://ibatis.apache.org/dtd/ibatis-3-config.dtd"> <configuration> <!-- 给持久层对象配置个别名,能方便调用 --> <typeAliases> <typeAlias type="com.daodao.bean.UserBean" alias="User" /> </typeAliases> <!-- 接口映射文件的位置 --> <mappers> <mapper resource="com/daodao/dao/IUserDao.xml"/> </mappers> </configuration>
6、写一个数据库层的接口:com.daodao.dao.IUserDao这里只有一个数据库操作的方法:getUser()
package com.daodao.dao; import com.daodao.bean.UserBean; public interface IUserDao { UserBean getUser(String name); }
7、配置接口的映射文件IUserDao.xml;
注意:为了方便配置,务必请把此文件的名称与接口的名称一致,并且在同一路径下;
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN" "http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd"> <!-- 务必配置正确namespace 就是所映射的接口类--> <mapper namespace="com.daodao.dao.IUserDao"> <!-- resultType="User"这个使用的就是配置文件里面的别名 --> <select id="getUser" parameterType="string" resultType="User"> select * from test where name=#{name} </select> </mapper>
8、配置我们的Spring的配置文件:appliactionContext.xml
<?xml version="1.0" encoding="gbk"?> <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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"> <!-- 获取JDBC连接属性 --> <context:property-placeholder location="classpath:jdbc.properties"/> <!-- 配置数据源 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driverClassName}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean> <!-- sqlSessionFactory --> <!-- MyBatis在spring中Bean的配置,都是固定的 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="configLocation" value="classpath:mybatis-config.xml" /> <property name="dataSource" ref="dataSource" /> </bean> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg index="0" ref="sqlSessionFactory" /> </bean> <!-- 配置映射器 --> <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean"> <property name="mapperInterface" value="com.daodao.dao.IUserDao" /> <property name="sqlSessionFactory" ref="sqlSessionFactory" /> </bean> <!-- 为业务逻辑层注入数据的对象 --> <bean id="userService" class="com.daodao.service.impl.UserServiceImpl"> <property name="userDao" ref="userMapper"></property> </bean> </beans>
8、整个项目是配置完成了,下面我进行一下测试:不知道为什么我这个能用main程序来测试,我想大概是因为sqlSessionFactory需要启动服务器才能生成吧!所以我这里使用jsp测试!直接贴代码!
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%> <%@page import="org.springframework.web.context.support.*,org.springframework.context.*"%> <%@page import="com.daodao.service.impl.UserServiceImpl"%> <%@page import="org.springframework.web.context.WebApplicationContext"%> <% WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(this.getServletContext()); out.print(((UserServiceImpl)wac.getBean("userService")).getUser("admin").getName()); %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> </body> </html>
然后大家把项目部署到服务器,启动,运行!(数据库大家自己去建立!)
关于其他详情大家去附件查看吧!想要的源代码的童鞋请留下邮箱!