jsp通过js跳转到servlet后的传值问题

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jsp通过js跳转到servlet后的传值问题5

<form name="merchantForm" enctype="multipart/form-data" method="post" onsubmit="return HasChecked;">
<fieldset style="width: 600; height: 60;padding:2px;" >
<table>
<tr>
<td>
<font color="red">*</font>
商家名称:
<input type="text" name="merchantName" id="merchantName" width="280px" style="height:18px;width:300px" value="请您限制在10个字以内" />
</td>
</tr>
<tr>
<td>
<font color="red">*</font>
商家电话:
<input type="text" name="merchantCall" id="merchantCall" maxlength="11" />
</td>
</tr>
<tr>
<td>
<font color="red">*</font>
商家海报:
<input type="radio" name="radio1" checked onclick="SwitchUpType(true);">本地<input type="radio" name="radio1" onclick="SwitchUpType(false);">远程：
<input type="file" name="merchantPicture" onchange="CheckExt(this)" style="width:270px;">
<input type="submit" id="UploadButton" name="picture" value="开始上传" disabled><br/>
<tr><td width="500" id="PreviewImg"></td></tr>
<tr><td id="MsgList" valign="top"></td></tr>
<tr>
<td>
<font color="red">*</font>
商家地址:
<input type="text" id="merchantAdd" name="merchantAdd" style="height:18px;width:300px" />
</td>
</tr>
<tr>
<td>
<font color="red">*</font>
验证手机:
<input type="text" id="validatetCall" name="validatetCall" maxlength="11" />&nbsp &nbsp添加
</td>
</tr>
<tr>
<input type="submit" value="保存" name="save" onclick="checkEmpty()"   />
</td>
<td>&nbsp &nbsp
</td>
<td>
<input type="submit" value="取消" name="cancel" onclick="window.close();" />
</td>
</tr>
</table>
</fieldset>
</form>

<script>
//验证填入值不为空
function checkEmpty(){
var name = document.getElementById("merchantName").value;
var call = document.getElementById("merchantCall").value;
var picture = document.getElementById("UploadButton").value;
var adress = document.getElementById("merchantAdd").value;
var validate = document.getElementById("validatetCall").value;
if(name==""||call==""||picture==""||adress==""||validate==""){
      alert("请您填写所需要的信息");
   }
else{
// 跳转到AddMerchantServlet中
        document.merchantForm.action = "/discountCoupon/AddMerchant";
        document.merchantForm.submit();
}
}

</script>

@Override
protected void service(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {

//从addMerchant.jsp中取得数据
String merchantName =(String) request.getParameter("merchantName");
// String merchantCall = request.getParameter("merchantCall");
// String picture = request.getParameter("picture");
// String merchantAdd = request.getParameter("merchantAdd");
// String validateCall = request.getParameter("validateCall");
if(merchantName!=null)
System.out.println(merchantName);
else
System.out.println("数据没得到");}

得不到数据

2014年4月18日 12:01

forever1121
17
0 0 4

1个答案按时间排序按投票排序

0 0

采纳的答案

1 检查是否提交到servlet
2 若是进入则在service调试下，打个断点看下
最后想说的就是一般开发不在service里读取参数信息，一般都在doGet或者是doPost里，下面是官方的api说明
http://docs.oracle.com/javaee/1.3/api/javax/servlet/http/HttpServlet.html#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

2014年4月18日 13:29