springmvc 中ajax傳輸數據（對象）

<pre class="html" name="code">form表單

<form:form id="inputForm" modelAttribute="user" action="/user/save" method="post" class="form-horizontal">
		<form:hidden path="id"/>
		<label style="height: 30px;margin-top: -20px;" type="hidden" id="msgs" name="msgs" class="error"> </label>
		
		<div class="control-group">
			<label class="control-label" >用戶名</label>
			<div class="controls">
				<form:select path="name">
					<form:options items="${name}" class="required"/>
				</form:select>
			</div>
		</div>
		
		<div class="control-group">
			<label class="control-label" >密碼</label>
			<div class="controls">
				<form:select path="pwd">
					<form:options items="${pwd}" class="required"/>
				</form:select>
			</div>
		</div>
		<div class="form-actions">
			<input id="btnSubmit" class="btn btn-primary" type="button" onclick="save()" value="保 存"/>
		</div>
	</form:form>

前臺js

<script type="text/javascript">
			//查看用戶名在數據庫中是否唯一
			function save(){
				 $.ajax({
					 url:"/user/checkSave",
					 type: "get",  //數據發送方式   
                     dataType: "json", //接受數據格式
                     cache:false,
     				 async:false,
					 //獲取form表單，往後臺傳
     				 data:$('#inputForm').serialize(),
     				 success:function(mssg){
     					 //false爲有，true爲沒有
     					if(mssg==true){
     						//如果返回true則提交from表單
     						document.getElementById("inputForm").submit();
     					}else{
							//如果返回false，則在界面提示用戶
     						document.getElementById("msgs").style.display = "block";
     						document.getElementById("msgs").innerHTML=mssg.msg;
     						return false;
     					}
     				 }
				 });
			}
	</script>

<pre class="java" name="code">後臺controller

@ResponseBody
@RequestMapping("checkSave")public String checkSave(User user, HttpServletResponse response, HttpServletRequest request) {//。。。獲得用戶名，在數據庫中進行一系列判斷，省略此代碼//如果數據庫中已有該登錄名，則提示用戶String msg="";if(!msg.equals("")){ String result = "{\"msg\":\"該"+msg+"已存在，請重新輸入！\"}"; try { //用json格式在前臺顯示出來 PrintWriter out = null; response.setContentType("application/json"); out = response.getWriter(); out.write(result); response.reset();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} return result;}return "true";}