mybatis简化的增删该查

1.程序框架

2.oracle数据库

create table t_user(
t_id number,
t_name varchar2(10),
t_password varchar2(20)
);

3.Tuser.java

package com.eduask.pojo;

public class Tuser {
private int t_id;
private String t_name;
private String t_password;
public int getT_id() {
return t_id;
}
public void setT_id(int t_id) {
this.t_id = t_id;
}
public String getT_name() {
return t_name;
}
public void setT_name(String t_name) {
this.t_name = t_name;
}
public String getT_password() {
return t_password;
}
public void setT_password(String t_password) {
this.t_password = t_password;
}
public Tuser(int t_id, String t_name, String t_password) {
super();
this.t_id = t_id;
this.t_name = t_name;
this.t_password = t_password;
}
public Tuser() {
super();
// TODO Auto-generated constructor stub
}
@Override
public String toString() {
return "Tuser [t_id=" + t_id + ", t_name=" + t_name + ", t_password="
+ t_password + "]";
}

}

4.UserTest.java

package com.eduask.test;
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.Before;
import org.junit.Test;
import com.eduask.pojo.Tuser;
public class UserTest {
//初始化;
private SqlSessionFactory sessionFactory;
@Before
public void up() throws IOException{
InputStream is=Resources.getResourceAsStream("configuration.xml");
sessionFactory=new SqlSessionFactoryBuilder().build(is);
}
//t_userAdd
@Test
public void insertUserById() throws IOException {
SqlSession session=sessionFactory.openSession();
Tuser t=new Tuser();
t.setT_id(1);
t.setT_name("link");
t.setT_password("123456");
int result=session.insert("insertOneUsers", t);
if(result==1){
System.out.println("add success");
session.commit();

}else{
System.out.println("excute failure");
}
session.close();
}

//t_userDelete
@Test
public void deleteUserById() throws IOException {
SqlSession session=sessionFactory.openSession();
int result=session.delete("deleteOneUsers", 1);
if(result==1){
System.out.println("delete success");
session.commit();

}else{
System.out.println("delete failure");
}
session.close();
}
//t_userSelect
@Test
public void selectUserById() throws IOException {
SqlSession session=sessionFactory.openSession();
Tuser tuser=session.selectOne("selectOneUsers", 1);
System.out.println(tuser);
session.close();
}


//t_userUpdate
@Test
public void updateUserById() throws IOException {
SqlSession session=sessionFactory.openSession();
Tuser tuser=new Tuser(1, "tom", "123456");
tuser.setT_id(1);
int result=session.update("updateOneUsers",tuser);
System.out.println(result);
if(result==1){
System.out.println("update success");
session.commit();

}else{
System.out.println("update failure");
}
session.close();


}
}

5.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="com.eduask.pojo.Tuser">
<!-- 查询一条记录 -->
<select id="selectOneUsers" resultType="com.eduask.pojo.Tuser" parameterType="int">
select * from t_user where t_id=#{t_id}
</select>
<!-- 增加一条语句 -->
<insert id="insertOneUsers" parameterType="com.eduask.pojo.Tuser">
insert into t_user values(#{t_id},#{t_name},#{t_password})
</insert>
<!--删除一条语句 -->
<delete id="deleteOneUsers" parameterType="int">
delete from t_user where t_id=#{t_id}
</delete>
<update id="updateOneUsers" parameterType="com.eduask.pojo.Tuser">
update t_user set t_name=#{t_name} where t_id=#{t_id}
</update>
</mapper>

6.configuration.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>
<!-- <typeAliases>
<typeAlias type="com.cb.Users"/>
</typeAliases> -->
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="oracle.jdbc.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:@localhost:1521:orcl" />
<property name="username" value="scott" />
<property name="password" value="tiger" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="mapper/Users.xml"/>
</mappers>
</configuration>

7.执行增加语句:

数据库查询一下：

执行查询语句：

执行修改语句：

修改之后数据库查询一下：

执行删除语句：

删除之后数据库查询一下：