我有2个jsp文件，其中第一个文件有一系列按钮。我的问题是使用我在第二个JSP文件中的第一个文件中单击的按钮值。
ApproveBusReq.jsp：
<%@ page language="java" %>
<%@ page session="true" %>
<%@ page import="java.sql.*,java.io.*,java.util.Random"%>
<% String bus = request.getParameter("busno");%>
<% String user = request.getParameter("user");%>
<HEAD>
<LINK href="styles.css" type="text/css" rel="stylesheet">
<script LANGUAGE="Javascript" SRC="Images/validate.js"></script>
<script LANGUAGE="Javascript">
<!--
function fnShowDetails()
{
var frm = document.forms(0);
var RouteCode = frm.RouteCode.value;
if (RouteCode=='')
{
alert("Please select RouteCode to Proceed");
}else{
var URL = "ShowRoutes01.jsp?RouteCode="+RouteCode;
fnEmpPopUp(URL,300,400);
}
}
function validate()
{
var frm = document.acc;
var RouteCode = frm.RouteCode.value;
if (RouteCode=='')
{
alert("Please select RouteCode to Proceed");
}
}
//-->
</script>
</HEAD>
<jsp:include page="MultiLevelmenu.htm"/><br><br><br>
<BODY class=Grad>
<%
Integer IAuth =(Integer)session.getAttribute("auth");
int auth= IAuth.intValue();
System.out.println("===Authentication=="+auth);
if(auth==2){
%><H3 align=center><IMG SRC="Images/error.gif" WIDTH="17" HEIGHT="13" BORDER=0 ALT="">You are not authorized to access this page</H3><%
}
else{
%>
<h2 align=center>Assign Seat Number</h2>
<%
Connection con;
ResultSet rs=null;
Statement stmt=null;
int[] ConValues = new int[100];
String[] ConValues2=new String[100];
int ConCount=0,i=0;
String Query1="";
try{
con=(Connection)session.getAttribute("connection");
stmt = con.createStatement();
String Query = "Select seatno from approve where studentid = "+user;
System.out.println(Query);
rs = stmt.executeQuery(Query);
int count=0;
while(rs.next())
{
System.out.println("Seat Already");
int x = rs.getInt(1);
count++;
}
if(count!=0)
{
%>
<center><h3 align=center>Seat Already Assigned</h3>
<br><A href="Home.html"> Back To Home </A></center>
<%
}
else
{
%>
<FORM Name='acc' METHOD=POST ACTION="ApproveBusReq1.jsp?bus=<%=bus%>&user=<%=user%>" onClick="return validate()">
<center> <%
Query1 = "Select seatno,studentid from approve where busno="+bus+" order by seatno";
System.out.println(Query1);
rs = stmt.executeQuery(Query1);
int seat=0;
String id;
i=0;
while(rs.next()){
seat=rs.getInt(1);
ConValues[i]=seat;
id=rs.getString(2);
ConValues2[i++]=id;
}
if(i==40||i==60){
%> <table bgcolor="gray" align="center" rules="none" hspace="50" border="1"><%
int k=0;
for(int j=0;j<i;j++){
if(k==0)
%><tr><%
if(k==4){
k=0;
%></tr><%
}
if(k==2){
for(int t=0;t<50;t++){
%><th> </th><%}}
if(ConValues2[j]!=null){
%><th><input type="submit" name="<%=ConValues[j]%>" value="<%=ConValues[j]%>" style="color:red"/></th><%}
else{
%><th><input type="submit" value="<%=ConValues[j]%>" name="<%=ConValues[j]%>" style="color:green"/></th><%}
k++;
}
%></table><% }
else if(i==80){
%> <table bgcolor="gray" align="center" rules="none" border="0"><%
int k=0;
for(int j=0;j<i;j++){
if(k==0)
%><tr><%
if(k==5){
k=0;
%></tr><%
}
%><th><input type="button" value="<%=ConValues[j]%>" style="color:red"/></th><%
k++;
}
%></table><% }
}}catch(Exception e){
%><%=e%><%
}
%>
</center>
</FORM>
</BODY>
<%
}
%>
approveBusReq1.jsp：
<%@ page language="java" %>
<%@ page session="true" %>
<%@ page import="java.sql.*,java.io.*,java.util.Random"%>
<% String bus = request.getParameter("bus");%>
<% String user = request.getParameter("user");%>
<% String seatno = request.getParameter("seatno");%>
<%
System.out.println("bus "+bus);
System.out.println("user "+user);
System.out.println("seatno "+seatno);
%>
<HEAD>
<LINK href="styles.css" type="text/css" rel="stylesheet">
<script LANGUAGE="Javascript" SRC="Images/validate.js"></script>
</HEAD>
<jsp:include page="MultiLevelmenu.htm"/><br><br>
<BODY class=Grad>
<h2 align=center>Cancel Route</h2>
<%
Connection con;
ResultSet rs=null;
Statement stmt=null,stmt1=null;
try{
con=(Connection)session.getAttribute("connection");
stmt = con.createStatement();
String rcode="null";
%><%=seatno%><%
String Query2="update approve SET approve.studentid='" + user + "' where busno="+bus+" AND seatno=" + seatno;
int result1 = stmt.executeUpdate(Query2);
System.out.println(Query2);
String Query3="update busrequest SET busrequest.status=1 where studentid='"+user+"'";
int result2 = stmt.executeUpdate(Query3);
System.out.println(Query3);
if(result1!=0)
{
System.out.println(result1);
%>
<center><h3 align=center> Bus Approved Successfully </h3>
<A href="Home.html"> Back To Home </A> </center>
<%
}
else
{
%>
<center><h3 align=center>Already Approved</h3>
<A href="Home.html"> Back To Home </A>
</center>
<%
}
}
catch(Exception e)
{%>
<h3 align=center>Error: Connection Error</h3>
<center>
<A href="DeleteRoute0.jsp"> Back </A>
</center><br>
<%=e%><%}
%>
</BODY>
答案 0 :(得分：0)
为提交按钮指定固定名称。所以，替换
<input type="submit" name="<%=ConValues[j]%>" value="<%=ConValues[j]%>">
通过
<input type="submit" name="conValue" value="<%=ConValues[j]%>">
其值将作为具有给定名称
的请求参数提供String conValue = request.getParameter("conValue");
// ...
无关，您的JSP诚实地说是关于“最佳实践”的完整灾难。模型，视图和控制器逻辑混合在一个难以理解且难以维护的JSP文件中。已使用 Scriptlets 代替taglibs / EL来控制页面流并访问数据。 JDBC代码正在泄漏资源。数据库连接保留在会话范围内，而不是由池管理。 HTML使用90年代风格的大写标签/属性，并使用自1998年以来弃用的<center>标签。 Etcetera，etcetera。请确保您正在阅读有关该主题的正确和最新的书籍/教程:) Start here。