CRUD是指在做计算处理时的增加(Create)、读取(Retrieve)(重新得到数据)、更新(Update)和删除(Delete)几个单词的首字母简写. 下面列举实例来讲解这几个操作: 实体类: package com.oumyye.model; public class Student { private long id; private String name; private Class c; public long getId() { return id; } public void setId(long id) { this.id = id; }