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; } }