Hibernate annotation 多对多单向关联
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package com.hibernate.entity;import java.io.Serializable;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.Id;@Entitypublic class Student implements Serializable {/** * */private static final long serialVersionUID = 3543286868313801941L;private int id;private String name;//private Set<Teacher> teachers = new HashSet<Teacher>();@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//public Set<Teacher> getTeachers() {//return teachers;//}////public void setTeachers(Set<Teacher> teachers) {//this.teachers = teachers;//}}?
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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和ORMappingTest与之前一样，拷过来就可以使用
当然，.xml中要加
<mapping /><mapping />