mybatis入门案例1
2017-06-18 10:23
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1环境准备
jdk1.7+eclilpse nuna+mybatis3.2.7+mysql2工程搭建
导入jar包:
1mybatis的核心包和依赖包2mysql的驱动包
3junit(可选择)
选中所有jar包-右键-buildpath-add
3定义类User
package cn.itcast.po;import java.util.Date;
public class User {
private int id;
private String username;
private String sex;
private Date birthday;
private String address;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
@Override
public String toString() {
return "User [id=" + id + ", username=" + username + ", sex=" + sex
+ ", birthday=" + birthday + ", address=" + address + "]";
}
}
4在config下创建SqlMapConfig.xm全局配置l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mybatis的环境信息 -->
<environments default="development">
<environment id="development">
<!-- 配置JDBC事务控制,由mybatis进行管理 -->
<transactionManager type="JDBC"></transactionManager>
<!-- 配置数据源,采用连接池 -->
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/zn"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<!-- 加载映射文件 -->
<mappers>
<mapper resource="User.xml"/>
</mappers>
</configuration>
5在config下创建User.xml映射文件
<?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="test">
<select id="findUserById" parameterType="int" resultType="cn.itcast.po.User">
select * from user where id = #{id}
</select>
</mapper>
6在SqlMapConfig.xml中加载映射文件
<!-- 加载映射文件 --><mappers>
<mapper resource="User.xml"/>
</mappers>
7测试代码
package cn.itcast.first;import java.io.IOException;
import java.io.InputStream;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
import cn.itcast.po.User;
import com.sun.corba.se.spi.orbutil.fsm.Input;
public class MyBatisFirst {
@Test
public void findUserByIdTest() throws Exception{
//读取配置文件
String resource ="SqlMapConfig.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
//创建SqlSessionFactory
SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
//创建SqlSession
SqlSession sqlSession = sqlSessionFactory.openSession();
//调用SqlSession的增删改查
User user = sqlSession.selectOne("test.findUserById", 1);
ae7f
System.out.println(user);
//关闭资源
sqlSession.close();
}
}
8测试
点击类名-右键-Run As-Junit相关文章推荐
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