通過ajax從jsp頁面傳輸數據到web層，並從web層返回數據給jsp頁面

 

 

jsp中ajax代碼：
 1            $.ajax({
              var id = $("#studentid").val();//獲取標簽中的學生id
              url:'${pageContext.request.contextPath}/student/stu_delStudent.action?studentid='+id,
              data:'',
              type:'POST',
              dataType:'json',
              async:false,
              success:function(data){
                  alert(data.message);
              }
              
          }); 

 

action中的代碼：
1 public class StudentAction extends ActionSupport{
    private Student student;
    public Student getStudent() {
        return student;
    }
    public void setStudent(Student student) {
        this.student = student;
    }

    @Resource
    private StudentService studentService;
    
    public String delStudent() throws Exception{
        //接收請求數據
        int studentid = ServletActionContext.getRequest().getParameter("studentid");
        studentSerivce.delByStudentId(studentid);
        //創建一個JSON對象
        JSONObject json = new JSONObject();
        json.put(“message",刪除成功");//將返回信息保存在JSON對象中
        HttpServletResponse response = ServletActionContext.getResponse();
        //設置響應編碼格式，防止亂碼
        response.setContentType("text/html;charset=UTF-8");
        //將數據以json格式響應給ajax
        response.getWriter().write(json.toString());
        
        return null;
    }
}