mybatis之一對一關聯關係

我現在有兩張表,一張丈夫表，一張妻子表，每個丈夫和妻子是一一對應的關係

SQL如下，我要找出id爲1的丈夫及其妻子的信息

SELECT * from husband hus, wife wife WHERE hus.wife_id = wife.wife_id 
		and hus.wife_id=1

因爲丈夫和妻子之間存在一一對應的關係，所以我丈夫的Javabean設計如下：

public class Husband {
	
	private Long husId;
	private String husName;
	private Integer husAge;
	private Long wifeId;
	
	private Wife wife;

	public Long getHusId() {
		return husId;
	}

	public void setHusId(Long husId) {
		this.husId = husId;
	}

	public String getHusName() {
		return husName;
	}

	public void setHusName(String husName) {
		this.husName = husName;
	}

	public Integer getHusAge() {
		return husAge;
	}

	public void setHusAge(Integer husAge) {
		this.husAge = husAge;
	}

	public Long getWifeId() {
		return wifeId;
	}

	public void setWifeId(Long wifeId) {
		this.wifeId = wifeId;
	}

	public Wife getWife() {
		return wife;
	}

	public void setWife(Wife wife) {
		this.wife = wife;
	}

	@Override
	public String toString() {
		return "Husband [husId=" + husId + ", husName=" + husName + ", husAge=" + husAge + ", wifeId=" + wifeId
				+ ", wife=" + wife + "]";
	}
	
	
}

可以 看到，丈夫的實體類中包含着妻子信息Wife這個實體類，那麼這時候使用,你想通過mybatis查詢出包含妻子信息的完整實體類，就需要藉助resultMap了，具體的看下面的xml

<?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="dao.HusDaoImpl">

	<resultMap type="bean.Husband" id="hus">
		<result property="husId" javaType="java.lang.Long" column="hus_id"/>
		<result property="husName" javaType="java.lang.String" column="hus_name"/>
		<result property="husAge" javaType="java.lang.Integer" column="hus_age"/>
		<result property="wifeId" javaType="java.lang.Long" column="wife_id"/>
		
		<association property="wife">
			<result property="wifeId" javaType="java.lang.Long" column="wife_id"/>
			<result property="wifeName" javaType="java.lang.String" column="wife_name"/>
			<result property="wifeAge" javaType="java.lang.Integer" column="wife_age"/>
		</association>
		
	</resultMap>

	<select id="select" parameterType="java.lang.Long" resultMap="hus">
		SELECT * from husband hus, wife wife WHERE hus.wife_id = wife.wife_id 
		and hus.wife_id=#{0}
	</select>
	
</mapper>

可以看到，husband這個類中的wife信息就是藉助 association標籤來說明清楚哪些字段對應哪些值