Mybatis简单注解使用

1：pom.xml文件配置

  
    mysql
    mysql-connector-java
    8.0.25
  
  
    org.mybatis
    mybatis
    3.3.0
  
  
    log4j
    log4j
    1.2.13
  
  
    junit
    junit
    4.10
  

2：jdbc.properties配置

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/jdbc1?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true
jdbc.username=root
jdbc.password=010429

3：log4j.properties配置

log4j.rootLogger=debug, stdout, R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

# Pattern to output the caller's file name and line number.
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n

log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=example.log

log4j.appender.R.MaxFileSize=100KB
# Keep one backup file
log4j.appender.R.MaxBackupIndex=5

log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n
4：sqlMapConfig.xml配置

<?xml version="1.0" encoding="UTF-8"?>




    

    
        
        
            
            
            
            
                
                
                
                
                
            
        
    




    


5Users实现

package com.xiaoze.domian;

public class Users {
    private int id;
    private String name;
    private String password;
    private String email;
    private String birthday;

    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 String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getBirthday() {
        return birthday;
    }

    public void setBirthday(String birthday) {
        this.birthday = birthday;
    }

    @Override
    public String toString() {
        return "Users{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", password='" + password + '\'' +
                ", email='" + email + '\'' +
                ", birthday='" + birthday + '\'' +
                '}';
    }
}
6：UsersMapper接口实现

package com.xiaoze.mapper;

import com.xiaoze.domian.Users;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

public interface UsersMapper {

    @Insert("insert into users values(#{id},#{name},#{password},#{email},#{birthday})")
    public void save(Users users);

    @Update("update users set password = #{password} where id = #{id}")
    public void update(Users users);

    @Delete("delete from users where id = #{id}")
    public void delete(int id);

    @Select("select * from users where id = #{id}")
    public Users findById(int id);

    @Select("select * from users")
    public List findAll();
}
7：测试类实现

package com.xiaoze.Test;

import com.xiaoze.domian.Users;
import com.xiaoze.mapper.UsersMapper;
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 java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * @author 小泽
 * @create 2021-12-04  9:15
 * 记得每天敲代码哦
 */
public class test {

    private  UsersMapper mapper ;

    @Before
    public void before() throws IOException {
        //获取核心配置文件
        InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
        //获取session工厂对象
        SqlSessionFactory build = new SqlSessionFactoryBuilder().build(resourceAsStream);
        //获取session会话对象
        SqlSession sqlSession = build.openSession(true);
         mapper = sqlSession.getMapper(UsersMapper.class);
    }


    @Test
    //注解添加
    public void testSave(){
        Users users = new Users();
        users.setName("ooosss");
        users.setPassword("huhaoze");
        users.setEmail("ajcak@qq.com");
        users.setBirthday("1952-10-3");
        mapper.save(users);
    }

    @Test
    //注解修改
    public void testUpdate(){
        Users users = new Users();
        users.setId(9);
        users.setPassword("HHZ");
        mapper.update(users);
    }

    @Test
    //注解删除
    public void testDelete(){
        mapper.delete(9);
    }

    @Test
    //注解根据id查询
    public void testFindById(){
        Users users = mapper.findById(2);
        System.out.println(users);
    }

    @Test
    //注解查询全部
    public void testFindAll(){
        List all = mapper.findAll();
        for (Users users : all) {
            System.out.println(users);
        }
    }
}