通过javascript函数传递给servlet的参数
我们可以通过javascript函数将参数传递给servlet吗 这是我的代码，我试图在单击按钮“获取作者姓名”时将值从addUpdate.jsp的javascript函数传递到BookServlet。当我单击按钮时，它将成功地传递到servlet，但它不接受我通过函数传递的参数 addUpdate.jsp：通过javascript函数传递给servlet的参数,java,javascript,jsp,servlets,Java,Javascript,Jsp,Servlets,我们可以通过javascript函数将参数传递给servlet吗 这是我的代码，我试图在单击按钮“获取作者姓名”时将值从addUpdate.jsp的javascript函数传递到BookServlet。当我单击按钮时，它将成功地传递到servlet，但它不接受我通过函数传递的参数 addUpdate.jsp： <%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@page import="com.fulcrum.obl.model.Author"%>
<%@page import="java.util.ArrayList"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@page isELIgnored="false" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript">
function submitAddForm(button) {
alert("hiee");
if(button.value=="Get Authors names") {
alert("in iff");
//alert(document.getElementById("bookDetails"));
document.getElementById("bookDetails").action="BookServlet?authorNames=authorNames";
}
}
function setAuthorsNames() {
var x =document.getElementById("select");
var myList = document.getElementById("selected");
var myOption = document.createElement("Option");
for(var i=0;i < x.options.length;i++) {
if(x.options[i].selected ==true){
alert("in if");
myOption.text = x.options[i].value;
myOption.value = x.options[i].value;
myList.add(myOption);
x.remove(x.options.selectedIndex);
}
}
}
</script>
</head>
<body>
<h4>Book Form</h4>
<form id="bookDetails">
Long Title : <input type="text" name="longT">
<br>
<br>
Short Title : <input type="text" name="shortT" />
<br>
<br>
Isbn : <input type="text" name="shortT" />
<br>
<br>
Date of Publication : <input type="text" name="dop" />
<br>
<br>
No of pages : <input type="text" name="nop" />
<br>
<br>
bound type :
<select id="boundType">
<option value="0">HardBound</option>
<option value="1">SoftBound</option>
</select>
<br>
<br>
DVD Availability :
<select id="dvd">
<option value="y">Yes</option>
<option value="n">No</option>
</select>
<br>
<br>
No of copies available : <input type="text" name="noca" />
<br>
<br>
<%
if(request.getAttribute("authorNamesList") != null) {
ArrayList<Author> booksList = (ArrayList<Author>)request.getAttribute("authorNamesList");
%>
<select id="select" size="6">
<c:forEach items="${authorNamesList}" var="authorNames">
<option value="${authorNames.firstName}">${authorNames.firstName}</option>
</c:forEach>
</select>
<%
}
%>
<select size="6" id="selected">
</select>
<input type="submit" value="Get Authors names" name="Go" onClick="submitAddForm(this)">
<input type="button" value="Add" name="Add" onClick="setAuthorsNames()">
<br>
<br>
<input type="submit" value="Save Book" name="submitBook" onClick="submitAddForm()">
</form>
</body>
</html>
您可以使用隐藏的输入元素，并在提交表单之前设置隐藏输入元素的值 假设您的隐藏元素具有id“hidden_input”，然后在submitAddForm函数中添加以下行
document.getElementById("hidden_input").value = "desired_value";
现在当表格提交时。。。隐藏的输入值将被设置并传递到服务器您可以通过以下方式更改代码并将参数从javascript传递到servlet：-
function submitAddForm(button) {
var longT = document.getElementById("bookDetails").value;
var shortT = document.getElementById("shortT").value;
...........
...........
then pass the variables and do
document.forms[0].action = "BookServlet?longT="+longT+"shortT="+shortT....and all the other variables to pass;
document.forms[0].submit();
}
function submitAddForm(button) {
var longT = document.getElementById("bookDetails").value;
var shortT = document.getElementById("shortT").value;
...........
...........
then pass the variables and do
document.forms[0].action = "BookServlet?longT="+longT+"shortT="+shortT....and all the other variables to pass;
document.forms[0].submit();
}