Jquery 生成 Json 字符串

var jsonMsg = new Object(); 
jsonMsg.msg = msg; 
jsonMsg.info = info; 	
var json = JSON.stringify(jsonMsg);
生成 json : {"msg":"-100","info":"xxxxxxx"}

Ajax:
$.ajax({
	type: 'POST',
	url: getRootPath()+"/log/gis/testExc.do",
	data: {"jsonStr":json},
	dataType: 'json',
	success: function(data) {
		alert("succes");
	},
	error: function(XMLHttpRequest, textStatus, errorThrown) {
	}
});

Java:
JSONObject json = JSONObject.fromObject(request.getParameter("jsonStr"));
String msg = StringUtils.trimToNull(json.getString("msg"));
String info = StringUtils.trimToNull(json.getString("info"));
System.out.println("进入Action"+msg+"\t"+info);


jQuery.parseJSON:
var objs = jQuery.parseJSON('{"msg":' + '"'+msg+'"' + ',"info":' + '"'+info +'"'+ '}');