function showJSON() { 
var user = 
{ 
"username":"andy", 
"age":20, 
"info": { "tel": "123456", "cellphone": "98765"}, 
"address": 
[ 
{"city":"beijing","postcode":"222333"}, 
{"city":"newyork","postcode":"555666"} 
] 
} 
alert(user.username); 
alert(user.age); 
alert(user.info.cellphone); 
alert(user.address[0].city); 
alert(user.address[0].postcode); 
} 

function showJSON() { 
var user = 
{ 
"username":"andy", 
"age":20, 
"info": { "tel": "123456", "cellphone": "98765"}, 
"address": 
[ 
{"city":"beijing","postcode":"222333"}, 
{"city":"newyork","postcode":"555666"} 
] 
} 
alert(user.username); 
alert(user.age); 
alert(user.info.cellphone); 
alert(user.address[0].city); 
alert(user.address[0].postcode); 
user.username = "Tom"; 
alert(user.username); 
}

function showCar() { 
var carr = new Car("Dodge", "Coronet R/T", 1968, "yellow"); 
alert(carr.toJSONString()); 
} 
function Car(make, model, year, color) { 
this.make = make; 
this.model = model; 
this.year = year; 
this.color = color; 
}

function myEval() { 
var str = '{ "name": "Violet", "occupation": "character" }'; 
var obj = eval('(' + str + ')'); 
alert(obj.toJSONString()); 
} 

function myEval() { 
var str = '{ "name": "Violet", "occupation": "character" }'; 
var obj = str.parseJSON(); 
alert(obj.toJSONString()); 
}

response.getWriter().print("{ \"name\": \"Violet\", \"occupation\": \"character\" }");

function sendRequest() { 
var url = "/MyWebApp/JSONTest1"; 
var mailAjax = new Ajax.Request( 
url, 
{ 
method: 'get', 
onComplete: jsonResponse 
} 
); 
} 
function jsonResponse(originalRequest) { 
alert(originalRequest.responseText); 
var myobj = originalRequest.responseText.parseJSON(); 
alert(myobj.name); 
}

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

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 
} 
); 
} 

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\" }"); 
} 

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()); 
} 

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

obj = JSON.parse(json_str);
obj = jQuery.parseJSON(json_str);