mybatis表关联查询_MySQL

cfm_requirement_vendor_date为cfm_requirement_vendor的子表

cfm_requirement_vendor为cfm_requirement的子表

一、mybatis映射文件定义

 				  								 		SELECT	r.id,	r.requirement_id,	v.id as requirement_vendor_id,	v.vendor_id,	d.id as requirement_vendor_date_id,	FROM	cfm_requirement r	JOIN cfm_requirement_vendor v ON r.id = v.cfm_requirement_id	AND v.del_flag = 0 	join cfm_requirement_vendor_date d on v.id = d.cfm_requirement_vendor_id and d.del_flag=0 	WHERE	r.requirement_id = #{requirementId} and r.del_flag=0	

1、mapper.java

List selectNestedByRequirementId(int requirementId);

2、持久化对象

public class NestedRequirement extends Requirement { private List requirementVendorList;	public List getRequirementVendorList() {	return requirementVendorList;	}	public void setRequirementVendorList(	List requirementVendorList) {	this.requirementVendorList = requirementVendorList;	} }