js 代码

function jsonResponse(originalRequest) {     alert(originalRequest.responseText);     var myobj = originalRequest.responseText.evalJSON(true);     alert(myobj.name);     }    

JSON还提供了java的jar包  API也很简单，下面举个例子

在javascript中填加请求参数

js 代码

function sendRequest() {     var carr = new Car("Dodge", "Coronet R/T", 1968, "yellow");     var pars = "car=" + carr.toJSONString();     var url = "/MyWebApp/JSONTest1";     var mailAjax = new Ajax.Request(     url,     {     method: 'get',     parameters: pars,     onComplete: jsonResponse     }     );     }    

使用JSON请求字符串就可以简单的生成JSONObject并进行解析,修改servlet添加JSON的处理(要使用json.jar)

java 代码

private void doService(HttpServletRequest request, HttpServletResponse response) throws IOException {     String s3 = request.getParameter("car");     try {     JSONObject jsonObj = new JSONObject(s3);     System.out.println(jsonObj.getString("model"));     System.out.println(jsonObj.getInt("year"));     } catch (JSONException e) {     e.printStackTrace();     }     response.getWriter().print("{ \"name\": \"Violet\", \"occupation\": \"character\" }");     }    

同样可以使用JSONObject生成JSON字符串，修改servlet

java 代码

private void doService(HttpServletRequest request, HttpServletResponse response) throws IOException {     String s3 = request.getParameter("car");     try {     JSONObject jsonObj = new JSONObject(s3);     System.out.println(jsonObj.getString("model"));     System.out.println(jsonObj.getInt("year"));     } catch (JSONException e) {     e.printStackTrace();     }     JSONObject resultJSON = new JSONObject();     try {     resultJSON.append("name", "Violet")     .append("occupation", "developer")     .append("age", new Integer(22));     System.out.println(resultJSON.toString());     } catch (JSONException e) {     e.printStackTrace();     }     response.getWriter().print(resultJSON.toString());     }     js 代码 function jsonResponse(originalRequest) {     alert(originalRequest.responseText);     var myobj = originalRequest.responseText.evalJSON(true);     alert(myobj.name);     alert(myobj.age);     }  

参考