Methun

事件触发: onblur 2.编写AJAX代码: 项Action中提交:传递username参数 function checkUsername(){ // 获得文件框值: var username = document.getElementById("username").value; // 1.创建异步交互对象 var xhr

两个主键：courseId和coursePeriod为一对联合主键@Embeddable public class CoursePlanPK implements Serializable{ private static final long serialVersionUID = 1L; @Column(name="course_id") private String cour