spring+mybatis简单框架搭建

这个知识使用了部分的maven,因此jar能够去个人github中下载 sql

use test;
DROP TABLE IF EXISTS t_user;
create table t_user
(
 userId  int primary key auto_increment,
 userName VARCHAR(50) not null,
 userAge int not null
)ENGINE=InnoDB DEFAULT CHARSET=utf8;

insert into t_user values(1,'小王',10);
insert into t_user values(2,'红红',11);
insert into t_user values(3,'明明',12);
insert into t_user values(4,'每天',13);

1.spring配置

1.1web.xml中配置Spring 容器加载器

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
	<!-- 配置初始打开的页面 -->
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	
	<!-- Spring 容器加载 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/SpringConf.xml</param-value>
	</context-param>

</web-app>

1.1配置spring文件SpringConf.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:aop="http://www.springframework.org/schema/aop"
	xsi:schemaLocation="  
           http://www.springframework.org/schema/beans  
           http://www.springframework.org/schema/beans/spring-beans-3.0.xsd  
           http://www.springframework.org/schema/aop  
           http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
           http://www.springframework.org/schema/context  
           http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<!-- 配置数据源 -->
	<bean id="dataSource"
		class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName" value="com.mysql.jdbc.Driver" />
		<property name="url" value="jdbc:mysql://192.168.236.131:3306/test" />
		<property name="username" value="root" />
		<property name="password" value="1994713" />
	</bean>

	<!-- 配置mybatis的会话工厂,没有spring时,须要手建,spring容器能够自动注入 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="configLocation" value="classpath:conf/MyBatisConf.xml" />
		<!-- <property name="typeAliasesPackage" value="com.tiantian.ckeditor.model" 
			/> -->
	</bean>
	<!-- 配置userMapper -->
	  <bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">  
       <property name="mapperInterface"  
           value="com.mucfc.mapper.UserMapper" />  
       <property name="sqlSessionFactory" ref="sqlSessionFactory" />  
    </bean> 
	<!-- 自动扫描注解的bean -->
	<context:component-scan base-package="com.mucfc.dao" />
</beans>

2.mybatispe配置

2.1配置总的配置文件

<?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>
   <!-- 配置映射类的别名 -->
 	<typeAliases>
      <typeAlias alias="User" type="com.mucfc.model.User"/> 
   </typeAliases>  
   <!-- 配置Mapper文件的路径 -->
   <mappers>
       <mapper resource="conf/mapper/UserMapper.xml"/>
   </mappers>
</configuration>

2.2配置userMapper文件

<?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.mucfc.mapper.UserMapper">	
	<!--  查询单条记录  -->  
    <select id="selectUserById" parameterType="int" resultType="User">  
       select * from t_user where userId = #{userId}  
    </select>  
</mapper>

3.编写实体类

public class User {
	private Integer userId;
	private String userName;
	private int userAge;
    ...

4.service部分编写

4.1Mapper接口文件

public interface UserMapper {
	public User selectUserById(int userId);
}

4.2User接口文件

public interface UserDao {
	public User findUserById(int id);
}

4.2User实现类文件

@Component
public class UserDaoImpl implements UserDao{
    @Autowired
	private UserMapper userMapper;
    
	public User findUserById(int id) {
		User user = userMapper.selectUserById(id);
		 return user; 
	}
	
}

5.页面部分编写

<body>
	<center>
		欢迎<br/>
		<%
			WebApplicationContext wac = WebApplicationContextUtils
					.getWebApplicationContext(this.getServletContext());
			UserDao userDao = (UserDao) wac.getBean("userDaoImpl");
		%>
		<%=userDao.findUserById(1)%><br />
		<%=userDao.findUserById(2)%><br />
		<%=userDao.findUserById(3)%><br />
		<%=userDao.findUserById(4)%><br />
	</center>