MyBatis 一对一关联映射

示例【根据姓名查询身份证信息】

创建t_person表

创建t_card表

创建Person

package com.po;

public class Person {
	private Integer pId;
	private String pName;
	private String sex;
	private Card card;
	public Integer getpId() {
		return pId;
	}
	public void setpId(Integer pId) {
		this.pId = pId;
	}
	public String getpName() {
		return pName;
	}
	public void setpName(String pName) {
		this.pName = pName;
	}
	public String getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public Card getCard() {
		return card;
	}
	public void setCard(Card card) {
		this.card = card;
	}
	@Override
	public String toString() {
		return "Person [pId=" + pId + ", pName=" + pName + ", sex=" + sex + ", card=" + card + "]";
	}
}

创建Card

package com.po;

public class Card {
	private Integer cId;
	private String code;
	public Integer getcId() {
		return cId;
	}
	public void setcId(Integer cId) {
		this.cId = cId;
	}
	public String getCode() {
		return code;
	}
	public void setCode(String code) {
		this.code = code;
	}
	@Override
	public String toString() {
		return "Card [cId=" + cId + ", code=" + code + "]";
	}
}

创建PersonMapper.xml

  
  	
  		
  		
  		
  		
  		
  			
  			
  		
  	
  	
  		select * from t_person p,t_card c where p.cId=c.cId and p.pId=#{pId}
  	
  

配置mybatis-config.xml

创建PersonDao

package com.dao;

import org.apache.ibatis.session.SqlSession;
import org.junit.Test;

import com.factory.SessionFactory;
import com.po.Person;

public class PersonDao {
	private SqlSession session=SessionFactory.getSqlSession();
	@Test
	public void findPersonById() {
		Person person=session.selectOne("com.mapper.PersonMapper.findPersonByCid", 1);
		System.out.println(person);
	}
}

执行findPersonById()方法