jquery ajax

通过jquery的ajax实现与servlet的交互
js：

$(document).ready(function(){
		$("#test").click(function()
		{
		$.ajax({
			type:"POST",
			url:"servlet/GetData",
			data:"name="+this.value,
			async:true,
			success:function(data){
			var json=eval(data);
			for(i=0;i<json.length;i++){
     			var value=json[i].value;
     			var key=json[i].key;
     			$("#content").append("<input type='checkbox' value='"+value+"'/>"+value);
     			$("#content").append("<br/>");
			}
		}
	});
});
});

注意：传回的Json格式为

引用

[{"value":"第一","key":1},{"value":"第二","key":2},{"value":"第三","key":3}]

经过eval函数处理后变为

引用

[object Object],[object Object],[object Object]

Servlet:

public void doPost(HttpServletRequest request, HttpServletResponse response)
	throws ServletException, IOException {

		array=new JSONArray();
		
		response.setContentType("text/html");
		response.setCharacterEncoding("utf-8");
		String name = request.getParameter("name");

		PrintWriter out = response.getWriter();
		List value = new ArrayList();
		value.add("第一");
		value.add("第二");
		value.add("第三");

		for (int i = 0; i < value.size(); i++) {
			JSONObject option = new JSONObject();
			try {
			option.put("key", i+1);
			option.put("value", value.get(i));
			} catch (JSONException e) {
			e.printStackTrace();
			}
			array.put(option);
		}

		out.print(array);
		System.out.println(array);
		out.flush();
		out.close();
	}

json.jar