無法從JSP頁面獲取的參數值

Question

假設

回到Home.jsp代碼包含類似

<input name="R" onclick="del(<%=rs.getString("VDB")%>)" type="radio" value="<%=rs.getString("VDB")%>" /> 

// 注按鈕：我傳遞VDB的價值德爾（）

它調用javascript爲：

<script type="text/javascript"> 
function del(delno) 
{ 
var ff = document.vendorform; 

var url = "delete.jsp?+vendor="+delno; 
window.navigate("delete_vendor.jsp?+vendor="+delno); 

//window.location.href="delete_vendor.jsp?+vendor="+delno; 
//ff.method = "POST"; 
//ff.action ="delete_vendor.jsp?+vendor="+delno; 
//ff.submit(); 
}//i have used 3 methods to redirect to delete.jsp 

delete.jsp：
此頁我要檢索廠商的價值我用：

String D1=request.getParameter("vendor"); 

但是，讓空值。
任何幫助

Answer 1

var url = "delete.jsp?+vendor="+delno; 

你插錯串+vendor。它應該只在url中有vendor。

var url = "delete.jsp?vendor="+delno; 

Answer 2

去掉 「+」 字之前的供應商。更改

var url = "delete.jsp?+vendor="+delno; 

要

var url = "delete.jsp?vendor="+delno;