Spring MVC Controller與jquery ajax請求處理json

在用 spring mvc 寫應用的時候發現jquery傳遞的【json數組對象】參數后臺接收不到，多訂單的處理，ajax請求：

var cmd =  {orders:[{"storeId":"0a1", "address":"西斗門路2號", "goods":[{"goodsId":"1"}, {"goodsId":"2"}, {"goodsId":"3"}]},{"storeId":"0a1", "address":"西斗門路2號", "goods":[{"goodsId":"4"}, {"goodsId":"4"}, {"goodsId":"5"}]}]}  $.ajax({  url : url,  type : "POST",  datatype:"json",  data : cmd,  success : function(data, stats) {  if (stats == "success") {  //   window.location.href="/yc"  
                    }  },  error : function(data) {  alert("請求失敗");  }  });  

開始如何傳后臺用 @RequestParam 去接收如何都接不到，分析下請求頭，原來是json格式沒轉換

Origin:http://localhost  
Referer:http://localhost/test/myorder  
User-Agent:Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.89 Safari/537.1  
X-Requested-With:XMLHttpRequest  
Form Dataview URL encoded  
orders[0][storeId]:0a1  
orders[0][address]:西斗門路2號  
orders[0][goods][0][goodsId]:1  
orders[0][goods][1][goodsId]:2  
orders[0][goods][2][goodsId]:3  
orders[1][storeId]:0a1  
orders[1][address]:西斗門路2號  
orders[1][goods][0][goodsId]:4  
orders[1][goods][1][goodsId]:4  
orders[1][goods][2][goodsId]:5  
Response Headersview source  
Content-Length:1051  
Content-Type:text/html;charset=utf-8  
Date:Mon, 26 Nov 2012 16:10:07 GMT  
Server:Apache-Coyote/1.1  

通過觀察，orders[0][storeId]:0a1?
orders[0][address]:西斗門路2號?
orders[0][goods][0][goodsId]:1 變成了多維數組的格式傳遞，沒有按json對象的方式傳遞（原以為 jquery會自動轉的，可惜我想多了，所以出現了烏龍）。?

下了個jquery的json插件，jquery.json-2.4.js 轉了下json；但是問題又來了，傳的格式正確但是后臺還是接不到，打印了下request.getParameterMap(),參數按json格式傳進來，但是接的方式又出現了問題，用string接肯定不行，String數組接也接不到，List也接不到，網上查查相關Controller的接收json對象的方式，需要用@RequestBody來進行接收，為了方便干脆把 orders去掉 直接用json數組

var cmd =  [{"storeId":"0a1", "address":"西斗門路2號", "goods":[{"goodsId":"1"}, {"goodsId":"2"}, {"goodsId":"3"}]},{"storeId":"0a1", "address":"西斗門路2號", "goods":[{"goodsId":"4"}, {"goodsId":"4"}, {"goodsId":"5"}]}]  

后臺用

(@RequestBody List orders)  

檢查下參數寫法，應該沒錯，測試之后還是有問題 報了這樣一個錯誤：?
POST http://localhost/test/order 415 (Unsupported Media Type)?這個問題應該是前臺請求過程中沒有指明contentType，ajax中加上contentType: "application/json; charset=utf-8"，再測試，果然可以了。完整代碼如下：
ajax：?

var cmd =  [{"storeId":"0a1", "address":"西斗門路2號", "goods":[{"goodsId":"1"}, {"goodsId":"2"}, {"goodsId":"3"}]},{"storeId":"0a1", "address":"西斗門路2號", "goods":[{"goodsId":"4"}, {"goodsId":"4"}, {"goodsId":"5"}]}]  $.ajax({  url : url,  type : "POST",  datatype:"json",  contentType: "application/json; charset=utf-8",  data : $toJSON(cmd),  success : function(data, stats) {  if (stats == "success") {  //   window.location.href="/yc"  
                    }  },  error : function(data) {  alert("請求失敗");  }  });  

Controller method:?

@RequestMapping(value = "/order", method = RequestMethod.POST)  public  ModelAndView order(@RequestBody List<Map<String,Object>> orders) {  System.out.println("orders size:" + orders.size());  
}  

以上希望能為遇到類似問題的朋友提供一些幫助。

Spring MVC Controller與jquery ajax請求處理json