【发布时间】：2018-03-21 17:12:05
【问题描述】：
我有一个可以正常工作的 JQuery / DataTables 应用程序。我想向 index.jsp 的加载（实际上是在加载之前）添加一个例程，以检查当前用户是否有权使用该应用程序。
我的问题是我没有任何运气让 Authenticate 类运行。这是我的代码：
index.jsp：
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@page import="member.Authenticate" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="css/datatables.min.css"/>
<link rel ="stylesheet" type="txt/css" href="css/dataTables.jqueryui.min.css"/>
<script type="text/javascript" src="js/jquery-3.2.1.min.js"></script>
<script type="text/javascript" src="js/datatables.min.js"></script>
<script type="text/javascript" src="js/datatables.jqueryui.min.js">
</script>
<script type="text/javascript">
$.get ( {
url: "${pageContext.request.contextPath}/Authenticate",
async: "false"
}); <!-- Authenticate does not get called -->
var ok = '<%= session.getAttribute("OK") %>';
$(document).ready(function () {
var memberTable = $('#memberList').DataTable({
"jqueryui": true,
"scrollY": "150px",
"paging": false,
"select": "single"
});
var txnTable = $('#txnList').DataTable({
"jqueryui": true,
"scrollY": "520px",
"paging": false,
"select": "single"
});
$("#btnFind").click(function () {
getSubsFromDB();
});
$("#txtSearchCriteria").keypress(function (event) {
if (event.which === 13) {
event.preventDefault();
getSubsFromDB();
}
});
function getSubsFromDB() {
searchCriteria = $("#txtSearchCriteria").val().trim();
subsOnly = "N";
currentOnly = "N";
if ($('#chkSubsOnly').is(":checked")) {
subsOnly = "Y";
}
if ($('#chkCurrentOnly').is(":checked"))
{
currentOnly = "Y";
}
memberTable.search( ' ' );
memberTable.ajax.url("${pageContext.request.contextPath}/SubSearch"
.concat("?SearchCriteria=", searchCriteria)
.concat("&SubscribersOnly=", subsOnly)
.concat("&CurrentOnly=", currentOnly)).load();
<!-- SubSearch Does get called -->
txnTable.ajax.url("${pageContext.request.contextPath}/TXNList"
.concat("?subscriber=9999999999999")).load();
}
memberTable.on('select', function (e, dt, type, indexes) {
var subscriber = memberTable.rows(indexes[0]).data()[0][0];
var npsGroup = memberTable.rows(indexes[0]).data()[0][6];
//alert (subscriber);
txnTable.ajax.url("${pageContext.request.contextPath}/TXNList"
.concat("?subscriber=",subscriber)).load();
});
document.getElementById("chkCurrentOnly").checked = false;
});
</script>
<title>MEMBER TXN</title>
</head>
<body>
<h1>Member TXN Display</h1>
<div>
<form>
(Enter: last name or last name,first name)
<input type="text" id="txtSearchCriteria" style="width:222px"/>
<input id="btnFind" type="button" value="Find" />
<input id="chkSubsOnly" type="checkbox" checked="true" />
<label for="chkSubsOnly">Subscribers Only</label>
<input id="chkCurrentOnly" type ="checkbox" checked="false"/>
<label for="chdCurrentOnly">Current Contracts Only </label>
</form>
<table id="memberList" class="display" cellspacing="0" width="70%" >
<thead>
<tr>
<th style="text-align: left">Subscriber</th>
<th style="text-align: left">Last Name</th>
<th style="text-align: left">First Name</th>
</tr>
</thead>
<tbody></tbody>
</table>
</div>
<div>
<table id="txnList" class="display" cellspacing="0">
<thead>
<tr>
<th style="text-align: left">Transaction</th>
<th style="text-align: left">Transaction Description</th>
<th style="text-align: left">Effective Date</th>
</tr>
</thead>
</table>
</div>
</body>
</html>
我的问题似乎是 Authenticate 没有被调用。
这里是 Authenticate Routine (IDE: NetBeans) --- 似乎可以独立工作 包成员；
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.http.HttpSession;
import oracle.jdbc.pool.OracleDataSource;
/**
*
* @author Ainsworth
*/
@WebServlet(name = "Authenticate", urlPatterns = {"/Authenticate"})
public class Authenticate extends HttpServlet {
/**
* Processes requests for both HTTP <code>GET</code> and <code>POST</code>
* methods.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
* @throws java.sql.SQLException
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, SQLException {
HttpSession session = request.getSession(true);
try {
String userName =
System.getProperty("user.name").trim().toUpperCase();
String userName2 = new
com.sun.security.auth.module.NTSystem().getName().trim().toUpperCase();
String oracleConnectionString
= "jdbc:oracle:thin:@(description=(address=(host=oraclehost)(port=1521)(protocol=tcp))(connect_data=(sid=testsid)))";
OracleDataSource ods = new OracleDataSource();
ods.setURL(oracleConnectionString);
ods.setUser("oracleUser");
ods.setPassword("oraclePassword");
Connection ora = ods.getConnection();
String strGetAuthRecordCount
= "SELECT COUNT(*) "
+ "FROM APP_USERS "
+ "WHERE UPPER(USER_ID) = ? AND APP_NAME = 'MEMBER_TXN' ";
PreparedStatement stmtAuthRecordCount;
stmtAuthRecordCount = ora.prepareStatement(strGetAuthRecordCount);
stmtAuthRecordCount.setString(1,userName);
ResultSet rsAuth = stmtAuthRecordCount.executeQuery();
rsAuth.next();
if (rsAuth.getInt(1) > 0) {
session.setAttribute("OK","true");
} else {
session.setAttribute("OK","false");
}
} catch (Exception ex) {
session.setAttribute("OK","error");
}
}
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
/**
* Handles the HTTP <code>GET</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
processRequest(request, response);
} catch (SQLException ex) {
}
}
/**
* Handles the HTTP <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
processRequest(request, response);
} catch (SQLException ex) {
}
}
/**
* Returns a short description of the servlet.
*
* @return a String containing servlet description
*/
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
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