json转对象数组与对象数组转json --Java

String obj = "[{MName:\"aaa\",MValue:\"bbb\"}]";      
System.out.println(obj);
JSONArray array=JSONArray.fromObject(obj);
JsonConfig jsonconfig=new JsonConfig();
jsonconfig.setArrayMode( JsonConfig.MODE_OBJECT_ARRAY );
jsonconfig.setRootClass(PropertyT.class);
PropertyT[] mProperties=(PropertyT[])JSONSerializer.toJava(array,jsonconfig);


for(int i=0;i<mProperties.length;i++){
System.out.println(mProperties[i].getMName());
System.out.println(mProperties[i].getMValue());
}


=======================
var objects;
function loadSearch()
{
var searchId=document.getElementById("searchId").value;
var ur="search.ao?method=postEditSearch&searchId="+searchId;
$.post(ur,null,loadSearchListener,"json");

}
function loadSearchListener(obj)
{
$("#txt_caption").attr("value",obj['MCaption']);
objects=obj;
$.post("search.ao?method=postInsertSearch",null,loadListener,"json");
}