AJAX请求及json对象封装小demo

js中的ajax请求方法
function query(){
var stuName = $("#stuName").val();
var requestUrl = "/s2sh/student/query.action";
var currentPageIndex = $("span[class='currentPageIndex']").val();
var pageSize =$("input[class='pageSize']").val();
$.ajax( {
url :requestUrl,
type : 'post',
dataType:'json',
data: "stuName="+escape(escape(stuName))+"&currentPageIndex="+currentPageIndex+"&pageSize="+pageSize,
success : function(result){
  var stus = result.students;
  $("#stuBody").html("");
          for(var i=0;i<stus.length;i++){
     $("#stuBody").append("<tr><td>"+stus[i].stuName+"</td><td>"+stus[i].stuSex+"</td><td>"+
     stus[i].stuBir+"</td><td>"+stus[i].stuAdd+"</td><td><a href='#' onclick='editItem("+stus[i].stuId+");'"+
     ">修改</a>&nbsp;&nbsp;<a href='#' onclick='deleteItems("+stus[i].stuId+");' >删除</a></td></tr>");
  }
  $("span[class='totalCount']").html(result.totalCount);
  $("span[class='currentPageIndex']").html(result.currentPage).val(result.currentPage);
  $("span[class='totalPage']").html(result.totalPage).val(result.totalPage);
     },error:function(err){
        alert( '系统内部错误'+err);
         }
});

}


Action的接受及封装
public class StudentAction {
public  StudentService studentService;

private String stuName;

        public String getStuName() {
return stuName;
}

public void setStuName(String stuName) {
this.stuName = stuName;
}


        public StudentService getStudentService() {
return studentService;
}

public void setStudentService(StudentService studentService) {
this.studentService = studentService;
}

        public void query() {

HttpServletRequest request = ServletActionContext.getRequest();
HttpServletResponse response = ServletActionContext.getResponse();

String tempName = unescape(request.getParameter("stuName"));

               
               try {
                         

students=studentService.queryStuByName(tempName,currentPageIndex,pageSize);
response.setContentType("text/html;charset=UTF-8");
response.getWriter().print(getStudentListJSON(students));


} catch (Exception e) {
e.printStackTrace();
}

        }

     public String getStudentListJSON(List<Student> students)
{
StringBuffer retVal=new StringBuffer("{'students':[");
int i=0;
for(Student t:students){
if(i!=0)
{
retVal.append(",");
}
retVal.append("{");
retVal.append("\"stuId\":\""+t.getStuId()+"\"");
retVal.append(",\"stuName\":\""+t.getStuName()+"\"");
retVal.append(",\"stuSex\":\""+t.getStuSex()+"\"");
retVal.append(",\"stuBir\":\""+t.getStuBir()+"\"");
retVal.append(",\"stuAdd\":\""+t.getStuAdd()+"\"");
retVal.append("}");
i=i+1;
}
retVal.append("],\"totalPage\":\""+10+ "\"}");
return retVal.toString();
}

      
        @SuppressWarnings("unused")
private String unescape(String src) {
  StringBuffer tmp = new StringBuffer();
  tmp.ensureCapacity(src.length());
  int lastPos = 0, pos = 0;
  char ch;
  while (lastPos < src.length()) {
   pos = src.indexOf("%", lastPos);
   if (pos == lastPos) {
    if (src.charAt(pos + 1) == 'u') {
     ch = (char) Integer.parseInt(src
       .substring(pos + 2, pos + 6), 16);
     tmp.append(ch);
     lastPos = pos + 6;
    } else {
     ch = (char) Integer.parseInt(src
       .substring(pos + 1, pos + 3), 16);
     tmp.append(ch);
     lastPos = pos + 3;
    }
   } else {
    if (pos == -1) {
     tmp.append(src.substring(lastPos));
     lastPos = src.length();
    } else {
     tmp.append(src.substring(lastPos, pos));
     lastPos = pos;
    }
   }
  }

  return tmp.toString();

}

}