详解Spring MVC事务配置

package com.lei.demo.entity;import javax.persistence.*;@Entity(name="users")public class Users {    public Users(){    super();  }    @Id  @GeneratedValue(strategy=GenerationType.AUTO)  @Column(name="id")  private Integer id;    @Column(name="user_name",length=32)  private String user_name;    @Column(name="age")  private Integer age;    @Column(name="nice_name",length=32)  private String nice_name;    //属性实现......}