多对多存数据时，中间表没有数据

Question

//action里的add方法
public String add(){
    model.getRoles().addAll(roleService.getByIds(roleIds));
    System.out.println(roleIds[0]);//能正确输出值
    System.out.println(model.getRoles());//能正确得到对象

    userService.add((User) model);
    return "_list";
}

package oa0106.model;

import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.ManyToOne;
import javax.persistence.Table;

/**

• 用户

• */
  @Entity
  @Table(name="t_user")
  public class User {

  private long id;
  private String name;
  private String password;
  private String gender;
  private String loginName;
  private String email;
  private int phoneNumber;
  private String describe;
  private Set roles=new HashSet();
  private Department department;
  @Id
  @GeneratedValue
  public long getId() {
  return id;
  }
  public void setId(long id) {
  this.id = id;
  }
  public String getName() {
  return name;
  }
  public void setName(String name) {
  this.name = name;
  }
  public String getPassword() {
  return password;
  }
  public void setPassword(String password) {
  this.password = password;
  }
  public String getGender() {
  return gender;
  }
  public void setGender(String gender) {
  this.gender = gender;
  }
  public String getLoginName() {
  return loginName;
  }
  public void setLoginName(String loginName) {
  this.loginName = loginName;
  }
  public String getEmail() {
  return email;
  }
  public void setEmail(String email) {
  this.email = email;
  }
  public int getPhoneNumber() {
  return phoneNumber;
  }
  public void setPhoneNumber(int phoneNumber) {
  this.phoneNumber = phoneNumber;
  }
  @Column(name="_describe")
  public String getDescribe() {
  return describe;
  }
  public void setDescribe(String describe) {
  this.describe = describe;
  }
  @ManyToMany(cascade=CascadeType.ALL)
  @JoinTable(name="role_user",
  joinColumns={@JoinColumn(name="user_id")},
  inverseJoinColumns={@JoinColumn(name="role_id")})
  public Set getRoles() {
  return roles;
  }
  public void setRoles(Set roles) {
  this.roles = roles;
  }
  @ManyToOne()
  @JoinColumn(name="department_id")
  public Department getDepartment() {
  return department;
  }
  public void setDepartment(Department department) {
  this.department = department;
  }
  }

package oa0106.model;

import java.util.HashSet;
import java.util.Set;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.Table;

/**

• 职位
• */ @Entity @Table(name="t_role") public class Role { private long id; private String roleName; private String describe; private Set users=new HashSet(); @Id @GeneratedValue public long getId() { return id; } public void setId(long id) { this.id = id; } public String getRoleName() { return roleName; } public void setRoleName(String roleName) { this.roleName = roleName; } @Column(name="_describe") public String getDescribe() { return describe; } public void setDescribe(String describe) { this.describe = describe; } @ManyToMany(mappedBy="roles",cascade=CascadeType.ALL) public Set getUsers() { return users; } public void setUsers(Set users) { this.users = users; } }

//dao里的存储方法
public void save(T entity) {
hibernateTemplate.save(entity);
}

不知道是不是hibernateTemplate的问题，用户和职位关联不上，其他的数据都能存进数据库，就是用户和职位的中间表没有数据。

Answer 1

注解中的主控方和被控方设置不对