Hibernate annotation 多对多双向关联(很少用)
双向关联 在认为的 主表 上用到 package com.hibernate.entity;import java.io.Serializable;import java.util.HashSet;import java.util.Set;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;import javax.persistence.JoinColumn;import javax.persistence.JoinTable;import javax.persistence.ManyToMany;@Entitypublic class Teacher implements Serializable {/** * */private static final long serialVersionUID = 3543286868313801941L;private int id;private String name;private Set<Student> students = new HashSet<Student>();@Id@GeneratedValuepublic int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}@ManyToMany@JoinTable( name="s_t", joinColumns= @JoinColumn(name="teacherid", referencedColumnName="id"),//当前表里的id inverseJoinColumns= @JoinColumn(name="studentid", referencedColumnName="id")//与此相对应的表里的id )public Set<Student> getStudents() {return students;}public void setStudents(Set<Student> students) {this.students = students;}}
?
hibernate.cfg.xml ，ORMappingTest? 和之前的一样
