MyBatis中的注解及配套注解使用详解

MyBatis中的@Mapper注解及配套注解使用详解

 2、导入相应的依赖

<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>5.1.40</version>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
  <groupId>log4j</groupId>
  <artifactId>log4j</artifactId>
  <version>1.2.17</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis</artifactId>
  <version>3.4.6</version>
</dependency>

<dependency>
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.11</version>
  <scope>test</scope>
</dependency>
3、代码

package cn.kgc.ldy.mapper;

import cn.kgc.ldy.entity.Person;
import org.apache.ibatis.annotations.*;

import java.util.List;

/**
 * @author ldy
 * @create 2020-07-18 15:42
 */
public interface PersonMapperZhuJie {
    @Insert("insert into tbl_person(name,age,birth,registerTime,salary) "
            + "values(#{name},#{age},#{birth},#{registerTime},#{salary})")
   /* 增加*/
    public void savePerson(Person person);
    @Delete("DELETE FROM tbl_person WHERE id=#{id}")
    /*删除*/
    public void delPerson(int id);
    @Update("update tbl_person set name=#{name},age=#{age},birth=#{birth},registerTime=#{registerTime},salary=#{salary}where id=#{id}")
    /*修改*/
    public void updatePerson(Person person);
    @Select("select * from tbl_person where id=#{id}")
    List<Person> getPersonById(@Param("id") Integer id);
    @Select(" select * from tbl_person")
    /* 查询所有*/
    public List<Person> getAllPerson();

}

4.测试类代码：

package cn.kgc.ldy.test;

import cn.kgc.ldy.entity.Person;
import cn.kgc.ldy.mapper.PersonMapper;
import cn.kgc.ldy.mapper.PersonMapperZhuJie;
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 java.io.InputStream;
import java.util.Date;
import java.util.List;

public class TestPersonMapperZhuJie {
    private static SqlSessionFactory sqlSessionFactory =null;
    static {
        try {
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }


    public static void main(String[] args) {
        //加载外部文件、
        try{
            SqlSession sqlSession = sqlSessionFactory.openSession();

            PersonMapperZhuJie mapper = sqlSession.getMapper(PersonMapperZhuJie.class);
            /*注解删除*/
            /*mapper.delPerson(10);*/
            /*注解查询所有*/
            /*List<Person> allPerson = mapper.getAllPerson();
            System.out.println(allPerson);*/
            /*注解查询单个*/
            /*List<Person> personById = mapper.getPersonById(5);
            System.out.println(personById);
            sqlSession.commit();*/
            /*注解增加*/
           /* Person person = new Person(null,"zhangsan",56,new Date(),new Date(),8888);
            mapper.savePerson(person);*/
            /*注解修改*/
           /*Person person = new Person(13,"zhangsan111",56,new Date(),new Date(),8888);
            mapper.updatePerson(person);
           sqlSession.commit();*/
        }catch (Exception e){
            e.printStackTrace();
        }
    }
}
5.运行结果(查询数控库单条数据)