Mybatis

create database mybatis;
use mybatis;
CREATE TABLE users(
    id INT PRIMARY KEY AUTO_INCREMENT,
    NAME VARCHAR(20),
    age INT
);

INSERT INTO users(NAME, age) VALUES(‘Tom‘, 12);
INSERT INTO users(NAME, age) VALUES(‘Jack‘, 11);

<?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>
　　<environments default="development">
　　　　<environment id="development">
　　　　　　<transactionManager type="JDBC" />
　　　　　　<dataSource type="POOLED">
　　　　　　　　<property name="driver" value="com.mysql.jdbc.Driver" />
　　　　　　　　<property name="url" value="jdbc:mysql://localhost:3306/mybatis" />
　　　　　　　　<property name="username" value="root" />
　　　　　　　　<property name="password" value="root" />
　　　　　　</dataSource>
　　　　</environment>
　　</environments>
</configuration>

public class Users {

        private int id;
        private String name;
        private int age;
        //get,set 方法
        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;
        }
        public Users(int id, String name, int age) {
            this.id = id;
            this.name = name;
            this.age = age;
        }
        public Users() {
            
        }
        public Users(String name, int age) {
            this.name = name;
            this.age = age;
        }
        @Override
        public String toString() {
            return "Users [id=" + id + ", name=" + name + ", age=" + age + "]";
        }
}

<?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.zhiyou100.hhz.mapper.UsersMapper">
　　<select id="getUser" parameterType="int" resultType="com.zhiyou100.hhz.bean.Users">
　　　　select * from users where id=#{id}
　　</select>
　　<insert id="addUser" parameterType="com.zhiyou100.hhz.bean.Users">
　　　　insert into users(name,age) value(#{name},#{age})
　　</insert>
　　<update id="updateUser" parameterType="com.zhiyou100.hhz.bean.Users">
　　　　update Users set name=#{name},age=#{age} where id=#{id}
　　</update>
　　<delete id="deleteUser" parameterType="int">
　　　　delete from Users where id=#{id}
　　</delete>
　　<select id="getUserAll" resultType="com.zhiyou100.hhz.bean.Users">
　　　　select * from users
　　</select>
　　<select id="selectUserByAge" parameterType="java.util.Map" resultType="com.zhiyou100.hhz.bean.Users">
　　　　<![CDATA[select * from users where age>=10 and age<=30]]>
　　</select>
</mapper>

<mappers>
    <mapper resource="com/zhiyou100/hhz/mapper/UsersMapper.xml" />
</mappers>

class UsersTest {

    final String str="com.zhiyou100.hhz.mapper.UsersMapper.";
    static SqlSession session = null;
    
    @BeforeAll
    static void setUpBeforeClass() throws Exception {
        Reader reader = Resources.getResourceAsReader("conf.xml");
        SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);
        session = sessionFactory.openSession();
    }

    @Test
    void test1() {
        Users users = session.selectOne(str+"getUser",1);
        System.out.println(users);
    }
    @Test
    void test2() {
        session.insert(str+"addUser",new Users("朱华龙",1));
    }
    @Test
    void test3() {
        session.update(str+"updateUser",new Users(1,"王玉芳",25));
    }
    @Test
    void test4() {
        session.delete(str+"deleteUser",6);
    }
    @Test
    void testselectAll() {
        List<Users> list = session.selectList(str+"getUserAll");
        for(Users users:list) {
            System.out.println(users);
        }
    }
    @Test
    void testselectByAge() {
        Map<String, Integer> map=new HashMap<String,Integer>();
        map.put("min", 10);
        map.put("max", 30);
        List<Users> list = session.selectList(str+"selectUserByAge",map);
        for(Users users:list) {
            System.out.println(users);
        }
        
    }
    @AfterAll
    static void tearDownAfterClass() throws Exception {
        session.commit();
    }