jquery ajax 异步servlet

ajax的get方式

$.ajax({     
	        type: "Get",     
	        url: "/xiangmu/user/preparPayWeixin/result/"+out_trade_no+".action",     
	        contentType: "application/json; charset=utf-8",     
	        dataType: "json",     
	        success: function(data) {
	        	if(data.data == 'success'){
		        	
	        	}
	        },     
	        error: function(err) {     
	        	
	        }
	    });

 ajax的post方式

$.ajax({     
	        type: "Post",     
	        url: "/xxx/user/preparPayWeixin/result.action",     
	        contentType: "application/json; charset=utf-8",     
	        dataType: "json",
                async: true,//是否同步
                data:{Name:"sanmao",Password:"sanmaoword"},
	        success: function(data) {
	        	if(data.data == 'success'){
		        	
		           
	        	}
	        },     
	        error: function(err) {     
	        	
	        }
	    });

 servlet端，返回json

HttpServletResponse response= getResponse();
		try {
	        //设置页面不缓存
	        response.setContentType("application/json");
	        response.setHeader("Pragma", "No-cache");
	        response.setHeader("Cache-Control", "no-cache");
	        response.setCharacterEncoding("UTF-8");
	        PrintWriter out= null;
	        out = response.getWriter();
	        out.print("{\"data\":\"success\"}");
	        out.flush();
	        out.close();
	    } catch (IOException e) {
	        e.printStackTrace();
	    }

springmvc端：

get方式：路径参数为sn

@Controller
@RequestMapping("/user/preparPayWeixin")
public class PreparPayNotifyWeixinController extends BaseController{
	//路径参数为sn的get方式
	@ResponseBody//返回为json
	@RequestMapping(value="result/{sn}",produces = "text/html;charset=UTF-8",method = {RequestMethod.POST, RequestMethod.GET})
	public String getResult(@PathVariable("sn") String sn){
		String re = "{\"data\":\"success\"}";
		
		return re;
	}

 post方式：java接收

@RequestMapping("culFee")
	public @ResponseBody String culFee(Model model,@RequestBody String data){
		//@RequestBody，来接收参数
		return json形式字符串;
	}