mybatis之级联关系（一对一、一对多）

package com.blueStarWei.entity;

public class TPersonInfo {
    
    private Integer id;
    private String name;
    private Integer age;
    private Address address;
    
    //setter & getter
    
    @Override
    public String toString() {
        return "TPersonInfo [id=" + id + ", name=" + name + ", age=" + age + ", address=" + address + "]";
    }
    
}

package com.blueStarWei.entity;

public class Address {
    
    private int id;
    private String country;
    private String city;
    
    //setter & getter
    
    @Override
    public String toString() {
        return "Address [country=" + country + ", city=" + city + "]";
    }
    
}

package com.blueStarWei.mappers;

import java.util.List;

import com.blueStarWei.entity.TPersonInfo;

public interface PersonAddressMapper {
    
    List<TPersonInfo> findAllWithAddress();
}

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.blueStarWei.mappers.PersonAddressMapper">
    
    <select id="findAllWithAddress" resultMap="personResult">
        SELECT t1.*,t2.* FROM t_person_info t1 JOIN t_address t2 ON t2.id = t1.addressid 
    </select>
    
    <resultMap type="TPersonInfo" id="personResult">
        <id property="id" column="id"/>
        <result property="name" column="name"/>
        <result property="age" column="age"/>
        <association property="address" resultMap="addressResult"/>
    </resultMap>
    
    <resultMap type="Address" id="addressResult">
        <id property="id" column="id"/>
        <result property="country" column="country"/>
        <result property="city" column="city"/>
    </resultMap>

</mapper>