Jquery/ajax/json/java

[size=x-large]

//json数组
var b="";
var a="";
var data=[{'name':'6200','value':'0'}, {'name':'6101','value':'xa'}, {'name':'6102','value':'beijing'}, {'name':'6103','value':'haerbin'}];
//for循环
for(var x in data){
	a += data[x].name+data[x].value+"\n";
	}
for(var i=0;i<data.length;i++){
	b += data[i].name+data[i].value+"\n";
	}
alert(a+b);
//json字符串转化为json对象；方法一
var str3="{ name: 'John' }";
var obj3 = eval('(' + str3 + ')'); 
alert( obj3.name);

//由标准JSON字符串转换为JSON对象；方法二
 var str='{ "name": "John" }';
 var obj = jQuery.parseJSON(str);
 alert("1"+ obj.name);

//-------ajax实例片段-----------------
$.ajax({  
		
	       async:true,  
	       cache:false,  
	       data:{
				"id" : va,
				"name":val
			     }, 
	       type:"POST",  
	       dataType : 'json',  
	       url:"abc",  
	       error:function(json){alert(json+----error----");},  
	       timeout:60000,  
	       success:function(json){  
	             
	                 $(".p1").html(json.name);  
	                 $(".p2").html(json.id);  
	       }  
	 });  

		String id = request.getParameter("id");
		String name = request.getParameter("name");
		JSONObject js = new JSONObject();
		js.put("id", id);
		js.put("name", name);
		System.out.println(js);
		response.setContentType("text/html;charset=utf-8");
		PrintWriter out = response.getWriter();
		out.write(js.toString());

[/size]

//List对象转化json实例片段
List list = new LinkedList();  
        for(int i=0;i<3;i++){  
            Person p = new Person();  
            p.setAge(i);  
            p.setName("name"+i);  
            list.add(p);  
        }  
        JSONArray jsonarray = JSONArray.fromObject(list);