package com.wxh.hibernate.model;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class Teacher {
  private int id;
  private String name;
  private String title;
  @Id
  public int getId() {
    return id;
  }
  @Id
  public void setId(int id) {
    this.id = id;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getTitle() {
    return title;
  }
  public void setTitle(String title) {
    this.title = title;
  } 
}

在setId和getId方法的前面加上@ID 问题解决。