MyBatis框架基于Annotation注解的数据库增删改查操作

 代码：

User.java

package com.bean;

import java.io.Serializable;

public class User implements Serializable {
	private Integer id;
	private String name;
	private String sex;
	private Integer age;
	public User() {
		super();
		// TODO Auto-generated constructor stub
	}
	public User(String name, String sex, Integer age) {
		super();
		this.name = name;
		this.sex = sex;
		this.age = age;
	}
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public Integer getAge() {
		return age;
	}
	public void setAge(Integer age) {
		this.age = age;
	}
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "User [id=" + id + ", name=" + name + ", sex=" + sex + ", age=" + age + "]";
	}
	
}

FKSqlSessionFactory.java

package com.factory;

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;

public class FKSqlSessionFactory {
	
	private static SqlSessionFactory sqlSessionFactory = null;
	
	// 初始化创建SqlSessionFactory对象
	static{
		try {
			// 读取mybatis-config.xml文件
			InputStream inputStream = Resources.getResourceAsStream("mybatis-config.xml");
			sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	// 获取SqlSession对象的静态方法
	public static SqlSession getSqlSession(){
		return sqlSessionFactory.openSession();
	}

	// 获取SqlSessionFactory的静态方法
	public static SqlSessionFactory getSqlSessionFactory() {
		return sqlSessionFactory;
	}
}

UserMapper.java

package com.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Options;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import com.bean.User;

public interface UserMapper {
     @Insert("insert into tb_user3(name,sex,age) values(#{name},#{sex},#{age})")
     @Options(useGeneratedKeys=true,keyProperty="id")
     int saveUser(User user);
     @Delete("delete from tb_user3 where id=#{id}")
     int removeUser(@Param("id") Integer id);
     @Update("update tb_user3 set name=#{name},sex=#{sex},age=#{age} where id=#{id}")
     void modifyUser(User user);
     @Select("select * from tb_user3 where id=#{id}")
     @Results({
 		@Result(id=true,column="id",property="id"),
 		@Result(column="name",property="name"),
 		@Result(column="sex",property="sex"),
 		@Result(column="age",property="age")
 	})
     User selectUserById(@Param("id") Integer id);
     @Select("select * from tb_user3")
     List selectAllUser();
}

InsertTest.java

package com.test;

import org.apache.ibatis.session.SqlSession;

import com.bean.User;
import com.factory.FKSqlSessionFactory;
import com.mapper.UserMapper;

public class InsertTest {
	public static void main(String[] args) throws Exception {
		// 获得Session实例
		SqlSession session=FKSqlSessionFactory.getSqlSession();
		// 创建UserMapper实例
		UserMapper um = session.getMapper(UserMapper.class);
		// 创建User对象并设置属性
		User user=new User();
		user.setName("haiges");
		user.setSex("男");
		user.setAge(18);
		// 插入数据
		um.saveUser(user);
		// 查看插入数据生成的主键
		System.out.println("插入数据生成的主键id为：" + user.getId());
		session.commit();
		session.close();
	}
}

DeleteTest.java

package com.test;

import org.apache.ibatis.session.SqlSession;

import com.factory.FKSqlSessionFactory;
import com.mapper.UserMapper;

public class DeleteTest {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// 获得Session实例
		SqlSession session = FKSqlSessionFactory.getSqlSession();
		UserMapper um = session.getMapper(UserMapper.class);
		// 删除User对象
		um.removeUser(5);
		session.commit();
		session.close();
	}

}

UpdateTest.java

package com.test;

import org.apache.ibatis.session.SqlSession;

import com.bean.User;
import com.factory.FKSqlSessionFactory;
import com.mapper.UserMapper;

public class UpdateTest {

	public static void main(String[] args) throws Exception  {
		// TODO Auto-generated method stub
		// 获得Session实例
		SqlSession session = FKSqlSessionFactory.getSqlSession();
		// 创建UserMapper实例
		UserMapper um = session.getMapper(UserMapper.class);
		// 查询id=5的User对象
		User user = um.selectUserById(6);
		//System.out.println("插入数据生成的主键id为：" + user.getId());
		// 修改查询到的User对象
		user.setName("update");
		user.setSex("女");
		user.setAge(19);
		// 修改User对象
		um.modifyUser(user);
		session.commit();
		session.close();
	}

}

SelectTest.java

package com.test;

import org.apache.ibatis.session.SqlSession;

import com.bean.User;
import com.factory.FKSqlSessionFactory;
import com.mapper.UserMapper;

public class SelectTest {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// 获得Session实例
		SqlSession session = FKSqlSessionFactory.getSqlSession();
		// 创建UserMapper实例
		UserMapper um = session.getMapper(UserMapper.class);
		User user = um.selectUserById(1);
		System.out.println(user);
		session.commit();
		session.close();
	}

}

SelectAllTest.java

package com.test;

import java.util.List;
import org.apache.ibatis.session.SqlSession;
import com.bean.User;
import com.factory.FKSqlSessionFactory;
import com.mapper.UserMapper;

public class SelectAllTest {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// 获得Session实例
		SqlSession session = FKSqlSessionFactory.getSqlSession();
		// 创建UserMapper实例
		UserMapper um = session.getMapper(UserMapper.class);
		// 根据id查询User对象
		List list = um.selectAllUser();
		// 查看查询到的User对象
		list.forEach(user->System.out.println(user));
		session.commit();
		session.close();
	}

}

截图(改操作):