JSON.parse()和JSON.stringify()

parse用于从一个字符串中解析出json对象

stringify()用于从一个对象解析出字符串

先上代码：

function addInToRoom(){
var userID = $('#userID').val();
var passWord = $('#passWord').val();

var IpAddr = $('#IpAddr').val();
var IpPort = $('#IpPort').val();
var host = "ws://"+IpAddr+":"+IpPort+"/ws";

var jsonData = {};
jsonData.MainCmdID = 1;
jsonData.SubCmdID = 2;
jsonData.userID = 1;
jsonData.passWord = hex_md5(passWord);
toStr = JSON.stringify(jsonData);
OutPutLog(toStr);
//alert(toStr);

try{
socket = new WebSocket(host);
OutPutLog('Socket Status: '+socket.readyState);
socket.onopen = function(){
var myData = new Date();
OutPutLog(myData.toLocaleString()+'Socket Status: '+socket.readyState+'(open)');
socket.send(toStr);
}
socket.onmessage = function(msg){
var myData = new Date();
OutPutLog("msg:"+msg);
OutPutLog("msg.data:"+msg.data);
var jsonData = JSON.parse(msg.data);
var jsonObj = JSON.stringify(msg.data);
OutPutLog("JSON.parse(msg.data):"+jsonData.MainCmdID);
OutPutLog("JSON.parse(msg.data):"+jsonData["MainCmdID"]);//推荐用此
//OutPutLog("JSON.stringify(msg.data):"+jsonObj);
OutPutLog(myData.toLocaleString()+":JSON.stringify(msg.data):"+jsonObj);
var parseJsonObj = JSON.parse(jsonObj);
OutPutLog("Json.parse(Json.stringify(msg.data)):"+parseJsonObj);


}
socket.onclose = function(){
var myData = new Date();
OutPutLog(myData.toLocaleString()+'Socket Status: '+socket.readyState+' (Close)');
}
}catch(exception){
OutPutLog('Error' + exception);
}
}

结果：

结果：

{"MainCmdID":1,"SubCmdID":2,"userID":1,"passWord":"96e79218965eb72c92a549dd5a330112"}

Socket Status: 0

2015/7/23 下午8:49:31Socket Status: 1(open)

msg:[object MessageEvent]

msg.data:{ "ErrorCode" : 1,"MainCmdID" : 1,"SubCmdID" : 101,"location" : "LogonServer" }

JSON.parse(msg.data):1

JSON.parse(msg.data):1

2015/7/23 下午8:49:31:JSON.stringify(msg.data):"{n "ErrorCode" : 1,n "MainCmdID" : 1,n "SubCmdID" : 101,n "location" : "LogonServer"n}n"

Json.parse(Json.stringify(msg.data)):{ "ErrorCode" : 1,"location" : "LogonServer" }

（编辑：李大同）

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