spring + mybatis +mysql入门实例

0 - prepare

    安装 : STS 2.9.1.RELEASE， mysql等
    在STS中新建一个spring template project - spring MVC project即可

1 - create db

create table user 
(
id int NOT NULL primary key auto_increment, 
name varchar(20) NOT NULL, 
age int NOT NULL
);

insert into user (name, age) values ("name1", 11)

2 - POJO

package com.xx.test.dao;

import java.io.Serializable;

public class User implements Serializable {

	private static final long serialVersionUID = -433577178466098132L;
	private int id;
	private String name;
	private int age;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
}

3 - mapper（使用注解，不用xml配置文件）

package com.xx.test.dao;

import java.util.List;

import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;

public interface UserMapper {
	
	@Insert("INSERT into user (name, age) VALUES (#{name}, #{age})")
	public void insertUser(User user);
	
	@Select("SELECT * from user  WHERE id = #{id}")
	public User getUser(@Param("id") int id);
	
	@Select("SELECT * from user")
	public List<User> getAllUser();
}

4 - mybatis-context.xml

	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">  
	    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
		<property name="url" value="jdbc:mysql://localhost:3306/mytest" />
		<property name="username" value="root" />
		<property name="password" value="admin" />
	</bean>  
	
	<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
	    <property name="dataSource" ref="dataSource" />  
	</bean>  
	  
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
	    <property name="dataSource" ref="dataSource" />  
	</bean>  
	  
	<!-- mapper bean -->  
	<bean id="userMapper" class="org.mybatis.spring.mapper.MapperFactoryBean">  
	    <property name="mapperInterface" value="com.xx.test.dao.UserMapper" />  
	    <property name="sqlSessionFactory" ref="sqlSessionFactory" />  
	</bean>

5 - 修改web.xml，加上mybatis-context

	<servlet>
		<servlet-name>appServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>
				/WEB-INF/spring/appServlet/servlet-context.xml,
				/WEB-INF/classes/mybatis-context.xml,
			</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>

6 - 修改pom.xml （修改完后用maven下载依赖的jar包）

		<!-- mybatis --> 
		<dependency>
			<groupId>org.mybatis</groupId>
		  	<artifactId>mybatis-spring</artifactId>
		  	<version>1.1.1</version>
		</dependency> 
	  
	  	<!-- mysql -->
	    <dependency>  
	        <groupId>mysql</groupId>  
	        <artifactId>mysql-connector-java</artifactId>  
	        <version>5.1.21</version>  
	    </dependency>

7 - test

		List<User> users = userMapper.getAllUser();
		for(User u : users) {
			System.out.println(u.getName()+", id >> "+u.getId());
		}
		System.out.println("----------insert before-------");
		User u = new User();
		u.setName("insertUser");
		u.setAge(22);
		userMapper.insertUser(u);
		System.out.println("----------insert end-------");