jquery异步请求返回JSON

第一步：前台的Js Demo:

function submitForm(){

var hostname  = $("#hostname").val();

var  port= $("#port").val();

var  validName= $("#validName").val();

var  vp= $("#vp").val();

$.getJSON("req?hostname="+hostname+"&port="+port+"&validName="+validName+"&vp="+vp, function(json){

var iss = json.issuccess   //前端解析

if(iss=="S") {

$("#etable").append("<tr><td>"+hostname+"</td><td>"+port+"</td><td>"+validName+"</td><td>"+vp+"</td><td>"+json.validcode+"</td></tr>");

}

});

}

第二步：后端Demo:

@RequestMapping("/main/req")

public String save(){

Date date = new Date();

String hostname   = this.request.getParameter("hostname");

String port = this.request.getParameter("port");

String validName = this.request.getParameter("validName");

String   vp = this.request.getParameter("vp");

String validcode ="";

validcode = DateFormatUtil.StringFromDate(date);

validcode = Base64.encode(validcode.getBytes());

String savetime = DateFormatUtil.StringFromStanderDate(date);

String id = GUID.getGUID();

Mailconfig mailconfig = new Mailconfig();

mailconfig.setId(id);

mailconfig.setHostname(hostname);

mailconfig.setPort(port);

mailconfig.setSavetime(savetime);

mailconfig.setValidCode(validcode);

mailconfig.setValidName(validName);

mailconfig.setVp(vp);

boolean res = mailService.save(mailconfig);

Map<String,Object> returnMsg = new HashMap<String,Object>();

try {

if(res == true){

returnMsg.put("issuccess", "S");

returnMsg.put("validcode", validcode);

this.response.getWriter().print(JSONObject.fromObject(returnMsg));

}else {

returnMsg.put("issuccess", "E");

this.response.getWriter().print(JSONObject.fromObject(returnMsg));

}

} catch (IOException e) {

e.printStackTrace();

}

return null;

}