1.遍历List集合中的数据存入jsonobject中然后放入jsonArray:

public String SearchInfo(HttpServletRequest request,HttpServletResponse response){
		List<NewsVO> nvlist=new ArrayList<NewsVO>();
		NewsVO nv1=new NewsVO();
		nv1.setId(1);
		nv1.setTitle("标题一");
		nv1.setUrl("www.123.com");
		NewsVO nv2=new NewsVO();
		nv2.setId(2);
		nv2.setTitle("标题二");
		nv2.setUrl("www.1233.com");
		NewsVO nv3=new NewsVO();
		nv3.setId(3);
		nv3.setTitle("标题三");
		nv3.setUrl("www.1d3.com");
		nvlist.add(nv1);
		nvlist.add(nv2);
		nvlist.add(nv3);
		/*for(NewsVO nvo:nvlist){
			System.out.println(nvo.getId()+nvo.getTitle());
		}*/
		//JSON操作,存JSONArray
		JSONArray jsons=new JSONArray();
		JSONObject json=null;
		for(NewsVO nv:nvlist){
			json=new JSONObject();
			json.put("id",nv.getId());
			json.put("title",nv.getTitle());
			json.put("url",nv.getUrl());
			json.put("tag",nv.getTag());
			jsons.add(json);
		}
		System.out.println(jsons);
		System.out.println(jsons.toString());
		//Test
		request.setAttribute("name","佰佰");
		return "/index";
	}