初始的mybatis項目結構
——————————代碼部分————————–
MybatisFirst.java
package com.zxy.mybatis.first;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.List;
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 com.zxy.mybatis.po.User;
public class MybatisFirst {
@Test
public void findByIdTest() throws IOException{
//mybatis配置文件
String resource="SqlMapConfig.xml";
InputStream inputStream=Resources.getResourceAsStream(resource);
//1.創建會化工廠,傳入
SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
//通過工廠創建sqlSession
SqlSession sqlSession=sessionFactory.openSession();
//通過sqlSession操作數據庫
User user=sqlSession.selectOne("test.findUserById", 1);
System.out.println(user);
//釋放資源
sqlSession.close();
}
//根據用戶名模糊查詢用戶
@Test
public void findByNameTest() throws IOException{
//mybatis配置文件
String resource="SqlMapConfig.xml";
InputStream inputStream=Resources.getResourceAsStream(resource);
//1.創建會化工廠,傳入
SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
//通過工廠創建sqlSession
SqlSession sqlSession=sessionFactory.openSession();
//通過sqlSession操作數據庫
List<User> list=sqlSession.selectList("test.findUserByName", "小明");
for(User e:list){
System.out.println(e);
}
//釋放資源
sqlSession.close();
}
//插入用戶
@Test
public void insertUserTest() throws IOException{
//mybatis配置文件
String resource="SqlMapConfig.xml";
InputStream inputStream=Resources.getResourceAsStream(resource);
//1.創建會化工廠,傳入
SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
//通過工廠創建sqlSession
SqlSession sqlSession=sessionFactory.openSession();
User user=new User();
user.setUsername("張曉軍");
user.setSex("男");
user.setBirthday(new Date());
user.setAddress("北京交通大學");
sqlSession.insert("test.insertUser", user);
sqlSession.commit();
// 獲取用戶信息主鍵
System.out.println(user.getId());
sqlSession.close();
}
//刪除用戶
@Test
public void delelteUserTest() throws IOException{
//mybatis配置文件
String resource="SqlMapConfig.xml";
InputStream inputStream=Resources.getResourceAsStream(resource);
//1.創建會化工廠,傳入
SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
//通過工廠創建sqlSession
SqlSession sqlSession=sessionFactory.openSession();
sqlSession.insert("test.deleteUser", 27);
sqlSession.commit();
sqlSession.close();
}
//更新用戶
@Test
public void updateUserTest() throws IOException{
//mybatis配置文件
String resource="SqlMapConfig.xml";
InputStream inputStream=Resources.getResourceAsStream(resource);
//1.創建會化工廠,傳入
SqlSessionFactory sessionFactory=new SqlSessionFactoryBuilder().build(inputStream);
//通過工廠創建sqlSession
SqlSession sqlSession=sessionFactory.openSession();
User user=new User();
user.setId(28);
user.setUsername("張開先");
user.setSex("男");
user.setBirthday(new Date());
user.setAddress("北京大學");
sqlSession.insert("test.updateUser", user);
sqlSession.commit();
sqlSession.close();
}
}
-------------------------------------------------------
User.java
package com.zxy.mybatis.po;
import java.util.Date;
public class User {
private int id;
private String username;// 用戶姓名
private String sex;// 性別
private Date birthday;// 生日
private String address;// 地址
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 + "]";
}
}
User.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">
<mapper namespace="test">
<!-- 根據id獲取用戶信息 -->
<select id="findUserById" parameterType="int" resultType="com.zxy.mybatis.po.User">
select * from user where id=#{id}
</select>
<!-- 根據用戶名模糊查詢用戶信息 -->
<select id="findUserByName" parameterType="java.lang.String" resultType="com.zxy.mybatis.po.User">
SELECT * FROM USER WHERE username LIKE '%${value}%'
</select>
<!-- 插入用戶 -->
<insert id="insertUser" parameterType="com.zxy.mybatis.po.User">
<selectKey keyProperty="id" order="AFTER" resultType="java.lang.Integer">
SELECT LAST_INSERT_ID()
</selectKey>
insert into user(username,sex,birthday,address) values(#{username},#{sex},#{birthday},#{address})
</insert>
<!-- 刪除用戶 -->
<delete id="deleteUser" parameterType="java.lang.Integer">
delete from user where id=#{id}
</delete>
<!-- 更新用戶 -->
<update id="updateUser" parameterType="com.zxy.mybatis.po.User">
update user set username=#{username},sex=#{sex},birthday=#{birthday},address=#{address} where id=#{id}
</update>
</mapper>
log4j.properties
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
SqlMapConfig.xml
<?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>
<!-- 和spring整合後 environments配置將廢除-->
<environments default="development">
<environment id="development">
<!-- 使用jdbc事務管理-->
<transactionManager type="JDBC" />
<!-- 數據庫連接池-->
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/mybatis?characterEncoding=utf-8" />
<property name="username" value="root" />
<property name="password" value="123" />
</dataSource>
</environment>
</environments>
<!-- 加載配置文件 -->
<mappers>
<mapper resource="sqlmap/User.xml"/>
</mappers>
</configuration>