数据库表结构如下 
框架集成--Spring与mybatis框架的集成 /*
* user表映射的实体类
* 表中字段对应着实体类中的属性
* 并生成他们的get set方法 和tostring方法
*
* */
public class User {
private Integer id;
private String name;
private Integer age;
private String password;
private String email;
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;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", age=" + age +
", password='" + password + '\'' +
", email='" + email + '\'' +
'}';
}
}
- 然后再是mybatis框架中user表需要的映射文件:UserMapper.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">
<!-- 注意这里的nampspace的路径要对应你的mapper层 的接口上-->
<mapper namespace="com.wdhcr.mapper.UserMaper">
<!-- 进行查询所有的操作-->
<select id="selectAll" resultType="com.wdhcr.entity.User">
select * from user03
</select>
</mapper>
mport com.wdhcr.entity.User;
import java.util.List;
public interface UserMaper {
//因为只有一个查询所有的语句，所以对应一个方法，注意这里的方法名要和映射文件中的id相同
//查询所有用户以一个list集合返回
public List<User> selectAll();
}
<?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>
<mappers>
<!-- 配置你的实体类具体操作的映射文件-->
<mapper resource="UserMapper.xml"></mapper>
</mappers>
</configuration>
- 接下来就是Spring和mybatis整合的核心配置文件了，这里要注意的是
- 1，数据源使用加载外部配置文件的方法实现的，我们使用c3p0数据库连接池作为数据源，
- 2，配置sqlsessionfactory的时候，要注意映射文件的路径。
- 3，配置UserMapper对象。要加载我们的mapp层的映射接口
<?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:p="http://www.springframework.org/schema/p"
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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 加载外部的所有配置文件，数据库的配置文件-->
<context:property-placeholder location="db.properties"></context:property-placeholder>
<!-- 配置c3p0数据库连接池-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driver}"></property>
<property name="jdbcUrl" value="${url}"></property>
<property name="user" value="${user}"></property>
<property name="password" value="${password}"></property>
</bean>
<!-- 配置sqlsessionfactory的生成-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 映射数据源 -->
<property name="dataSource" ref="dataSource"/>
<!-- 映射mapper文件 -->
<property name="mapperLocations" value="UserMapper.xml">
</property>
</bean>
<!-- 配置usermapper对象-->
<bean id="userMaper" class="org.mybatis.spring.mapper.MapperFactoryBean">
<property name="mapperInterface" value="com.wdhcr.mapper.UserMaper"></property>
<property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
</bean>
<!-- 配置事务管理-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
</beans>
driver = com.mysql.jdbc.Driver
url = jdbc:mysql://localhost:3306/库
user = 用户名
password = 密码
import com.wdhcr.entity.User;
import com.wdhcr.mapper.UserMaper;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import java.util.List;
public class Test {
public static void main(String[] args) {
//加载配置文件
ClassPathXmlApplicationContext classPathXmlApplicationContext =
new ClassPathXmlApplicationContext("spring_mybatis.xml");
//getbean，使用spring获取到指定的usermapper对应
UserMaper userMaper = classPathXmlApplicationContext.getBean(UserMaper.class);
//对象调用方法
List<User> users = userMaper.selectAll();
for (User user : users) {
System.out.println(user);
}
}
}
