Mybaties实现持久化增删查改

User表 ：
Id username password roleId

代码：

com.pojo包

1.User.java

package com.hp.pojo;

public class User {
	private int id;
	private String username;
	private String password;
	private int roleId;
	
	public User() {
		
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public int getRoleId() {
		return roleId;
	}
	public void setRoleId(int roleId) {
		this.roleId = roleId;
	}
	@Override
	public String toString() {
		return "User [id=" + id + ", username=" + username + ", password="
				+ password + ", roleId=" + roleId + "]";
	}


}

com.mapper包

1.UserMapper.java

package com.hp.mapper;

import java.awt.List;

import com.hp.pojo.User;

public interface UserMapper {
	public User query(int id);
	public List queryByName(String username);// 模糊查询
	public void update(int id,String password);//根据id改密码
	public void insert(int id ,String username,String password);
	public void delete(int id);
}

2.UserMapper.xml

  
    select * from User where id = #{id}
  
  
  
     select * from User
     where username like concat('%',#{username},'%')
  
  
  
        update User SET password = #{password},
        where id = #{id}
  
  
  
        INSERT INTO User(id,username,password ) VALUES (#{id},#{username}, #{password})

  
  
  
        DELETE FROM User WHERE id = #{id}
  
  
  
    
  

mybatis-config.xml