I have this JSP code for my web app:
I am getting a syntax error at "Delete" in the success clause. Can anyone help me to pinpoint the problem? Thank you, appreciate it!
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>atozknowledge.com demo loginjsp</title>
</head>
<body>
<%# page import="java.sql.*"%>
<%# page import="javax.sql.*"%>
<%
String userid=request.getParameter("usr");
session.putValue("userid",userid);
String pwd=request.getParameter("pwd");
Class.forName("com.mysql.jdbc.Driver");
java.sql.Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/tomcat","root","root");
Statement st= con.createStatement();
ResultSet rs=st.executeQuery("select * from users where userid='"+userid+"'");
if(rs.next())
{
if(rs.getString(2).equals(pwd))
{
out.println("welcome"+userid);
Delete
}
else
{
out.println("Invalid password try again");
}
}
else
%>
Home
</body>
</html>
Delete isn't valid Java code. If you want to get out of the Java scriptlet, use %> to do so (then <% to go back into it):
%>Delete<%
Your tag is inserted inside a Java Part of code. Juste move your tag or close your scriptlet
if(rs.getString(2).equals(pwd))
{
out.println("welcome"+userid);
%>
Delete
<%
}
else
{
out.println("Invalid password try again");
}
Related
Disclaimer: I've spent today researching this simple problem inside and out all across stachoverflow and beyond so please bear with me.
I have the following code on JSP:
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%#page import="com.contrast.db.Manager"%>
<%#page import="java.sql.Connection"%>
<%#page import="java.util.Map"%>
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
Integer age = Integer.valueOf(request.getParameter("age"));
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Test</title>
</head>
<body>
<%
Manager db = new Manager();
Connection conn = db.getConnection();
if (null == conn) {
out.println("Connection to MySQL failed");
} else {
out.println("Connection to MySQL succeeded");
}
Map<String, Integer> namesAndAge = db.findByAge(age);
%>
<h1>List of users older then <% out.println(age); %></h1>
<% out.println(namesAndAge); %>
<c:forEach items="${namesAndAge}" var="entry">
Key = ${entry.key}, value = ${entry.value}<br>
</c:forEach>
</body>
</html>
This code for intents and purposes should print out the contents of the HashMap returned by db.findByAge(age) but it doesn't
Understandably one could assume that HashMap could be empty, but it's not (please see screen shot below)
As you can see the HashMap is not empty but is not working
Any ideas what am I missing?
On the scriplets you declare objects, while in EL expressions what are referenced are attributes in a context (pageContext, request, session or application).
change this line:
Map<String, Integer> namesAndAge = db.findByAge(age);
For this:
request.setAttribute("namesAndAge", db.findByAge(age));
This is my current JSP code:
<%# page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<jsp:useBean id="user" class= "uts.wsd.User" scope="session" ></jsp:useBean>
<%
String name = request.getParameter("name");
String email = request.getParameter("email");
String password = request.getParameter("password");
String gender = request.getParameter("gender");
String color = request.getParameter("favcol");
user.setName(name);
user.setEmail(email);
user.setPassword(password);
user.setGender(gender);
user.setFavouriteColour(color);
%>
<body style="background: <%= color %>;">
<% if (request.getParameter("tos") == null ) {%>
<p>
Sorry, you must agree to the Terms of Service.</p>
<p>Click <a href="register.jsp" > here </a> to go back.
</p>
<%} else { %>
<jsp:forward page="index.jsp" />
<% } %>
</html>
Here I use jsp:forward page="index.jsp" to redirect to index.jsp page. Then, if I want to use response.sendRedirect("index.jsp")? How can I proceed?
I tried this:
<% if (request.getParameter("tos") == null ) {%>
<p>
Sorry, you must agree to the Terms of Service.</p>
<p>Click <a href="register.jsp" > here </a> to go back.
</p>
<%} else { %>
<response.sendRedirect("index.jsp")>
<% } %>
</html>
But it failed. Please help! Thank you!!
response.sendRedirect() is Java code not a tag, so you should not close the scriptlet tags before typing it, and it is not to be preceded by < and closed with >...its just Java code:
<%
}
else
{
response.sendRedirect("index.jsp");
return; //this is to redirect immediately so it doesn't
//run any code below this point before redirecting
}
%>
I have been exporting jasper report to pdf but it opens in the same window which is a problem to me because if i want to go to previous page i cant be able to go to previous page so i thought of opening pdf page in a new window but i dont have any idea of how to open it in a new window.
sample1.jsp
<%# page import="java.io.*"%>
<%# page import="java.sql.Connection"%>
<%# page import="java.sql.DriverManager"%>
<%# page import="java.util.HashMap"%>
<%# page import="java.util.Map"%>
<%# page import="net.sf.jasperreports.engine.*"%>
<%# page import="net.sf.jasperreports.engine.*" %>
<%# page import="java.text.SimpleDateFormat" %>
<%# page import="java.text.ParseException" %>
<%# page import="java.io.File" %>
<%# page import="java.io.FileInputStream" %>
<%# page import="java.io.FileNotFoundException" %>
<%# page import="java.io.InputStream" %>
<%# page import="java.sql.Connection" %>
<%# page import="java.sql.DriverManager" %>
<%# page import="java.sql.SQLException" %>
<%# page import="java.io.FileOutputStream" %>
<%# page import="java.io.ByteArrayOutputStream" %>
<%# page import="java.io.OutputStream" %>
<%# page import="java.util.HashMap" %>
<%# page import="java.util.Map" %>
<%# page import="net.sf.jasperreports.engine.util.*" %>
<%# page import="net.sf.jasperreports.engine.export.*" %>
<%#page import = "net.sf.jasperreports.engine.design.JRDesignQuery"%>
<%#page import = "net.sf.jasperreports.engine.xml.JRXmlLoader"%>
<%#page import = "net.sf.jasperreports.engine.design.JasperDesign"%>
<%#page import = "net.sf.jasperreports.view.JasperViewer"%>
<%#page import = "net.sf.jasperreports.engine.JRException"%>
<%#page import = "net.sf.jasperreports.engine.JRResultSetDataSource"%>
<%#page import = "net.sf.jasperreports.engine.JasperCompileManager"%>
<%#page import = "net.sf.jasperreports.engine.JasperExportManager"%>
<%#page import = "net.sf.jasperreports.engine.JasperFillManager"%>
<%#page import = "net.sf.jasperreports.engine.JasperPrint"%>
<%#page import = "net.sf.jasperreports.engine.JasperReport"%>
<%#page import = "net.sf.jasperreports.engine.data.JRCsvDataSource"%>
<%#page import = "net.sf.jasperreports.engine.export.ooxml.JRDocxExporter"%>
<%#page import = "net.sf.jasperreports.engine.export.JRPdfExporter"%>
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
Connection conn = null;
String cate=(String)session.getAttribute("cat");
String stat=(String)session.getAttribute("sta");
String dayy=(String)session.getAttribute("da");
String monthh=(String)session.getAttribute("mon");
String yearr=(String)session.getAttribute("yea");
String dayy1=(String)session.getAttribute("da1");
String monthh1=(String)session.getAttribute("mon1");
String yearr1=(String)session.getAttribute("yea1");
System.out.println("2 is:"+cate);
System.out.println("4 is:"+stat);
System.out.println("5 is:"+dayy);
System.out.println("6 is:"+monthh);
System.out.println("7 is:"+yearr);
System.out.println("8 is:"+dayy1);
System.out.println("9 is:"+monthh1);
System.out.println("10 is:"+yearr1);
try
{
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/marketing_database","root","root");
String sql="select * from lead where Status='" + stat.replaceAll("\\'","''") + "'";
sql+=" AND Category='" + cate.replaceAll("\\'","''") + "'";
sql+=" AND DATE(Lead_Date)>='" + yearr + "-" + monthh + "-" + dayy + "'";
sql+=" AND DATE(Lead_Date)<='" + yearr1 + "-" + monthh1 + "-" + dayy1 + "'";
String jrxmlFile ="D:/dev/tools/jasper files/report3.jrxml";
InputStream input = new FileInputStream(new File(jrxmlFile));
JasperDesign jasperDesign = JRXmlLoader.load(input);
System.out.println("Compiling Report Designs");
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
System.out.println("Creating JasperPrint Object");
HashMap<String,Object> map = new HashMap<String,Object>();
map.put("sql",sql);
byte[] bytes = JasperRunManager.runReportToPdf(jasperReport, map, conn);
response.setContentType("application/pdf");
response.setContentLength(bytes.length);
ServletOutputStream outStream = response.getOutputStream();
outStream.write(bytes, 0, bytes.length);
outStream.flush();
outStream.close();
}
catch(Exception e)
{e.printStackTrace();}
%>
</body>
</html>
view.jsp
<script type="text/javascript">
function setAction(nPage){
document.forms[0].action = nPage;
}
</script>
</head>
<body>
<form>
<%
String category=request.getParameter("category");
session.setAttribute("cat",category);
String status=request.getParameter("status");
session.setAttribute("sta",status);
System.out.println("status is:"+status);
String day=request.getParameter("day");
session.setAttribute("da",day);
String month=request.getParameter("month");
session.setAttribute("mon",month);
String year=request.getParameter("year");
session.setAttribute("yea",year);
String day1=request.getParameter("day1");
session.setAttribute("da1",day1);
String month1=request.getParameter("month1");
session.setAttribute("mon1",month1);
String year1=request.getParameter("year1");
session.setAttribute("yea1",year1);
%>
<select onchange="setAction(this.value)">
<option value=''> Make a selection </option>
<option value='sample1.jsp'> PDF</option>
<option value='XLS_LEAD.jsp'> XLS </option>
<option value='DOC_LEAD.jsp'> DOC </option>
<option value='XLSX_LEAD.jsp'> XLSX </option>
</select>
<br/>
<input type="submit" value="Submit">
</form>
</body>
Considering your view.jsp
I can see that you already have put all variables into the session you are only using the form to select to which page you need to go.
You can do something like this...
<script type="text/javascript">
function generateReport() {
var e = document.getElementById("idOfYourSelectYouNeedToAddedIt");
var strPage = e.options[e.selectedIndex].value;
window.open(strPage);
return false; //This make you stay on this page;
//return true; //Set the action tag in the form to the page you like to go to!
}
</script>
<form name="myForm" onsubmit="return generateReport()">
<select id = "idOfYourSelectYouNeedToAddedIt">
<option value=''> Make a selection </option>
..... the other option values
</form>
Note if you like to go to another page you can simple add action tag to your form tag and return true in the generateReport() function
example
<form name="myForm" action="thisIsWhereILikeToGo.jsp" onsubmit="return generateReport()">
Note: You should remove the onchange="setAction(this.value) code, it has no use anymore and consider checking that strPage is not empty, no selection...
I have a JSP that includes other JSPs using code like this:
<jsp:include page="include.jsp" />
I simply want to be able catch the exception and show the end user an error message if include.jsp is missing. How can I detect or catch the missing resource condition?
I think JSP has implicits objetcs, one of them is Exception.
Example of tutorialspoint:
<%# page errorPage="ShowError.jsp" %>
<html>
<head>
<title>Error Handling Example</title>
</head>
<body>
<%
// Throw an exception to invoke the error page
int x = 1;
if (x == 1) {
throw new FileNotFoundException("Error, one file is missing!!!");
}
%>
</body>
And only you have handle the exception in the error page:
<%# page isErrorPage="true" %>
<html>
<head>
<title>Show Error Page</title>
</head>
<body>
<h1>Opps...</h1>
<p>Sorry, an error occurred.</p>
<p>Here is the exception stack trace: </p>
<pre>
<% exception.printStackTrace(response.getWriter()); %>
</pre>
</body>
</html>
In your original JSP
<%# page errorPage="errorPage.jsp" %>
<html>
<head>
<title>JSP exception handling</title>
</head>
<body>
<jsp:include page="include.jsp" />
</body>
</html>
Then, in your errorPage.jsp
<%# page isErrorPage="true" %>
<html>
<head>
<title>Display the Exception Message</title>
</head>
<body>
<h2>errorPage.jsp</h2>
<i>An exception has occurred. Please fix the errors. Below is the error message:</i>
<b><%= exception %></b>
</body>
</html>
Credits: Examples extracted from this tutorial: http://beginnersbook.com/2013/11/jsp-exception-handling/
You should use java.io.File to check whether the file is missing.
<%# page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%#page import="java.io.*"%>
<%#page import="java.io.File.*"%>
<%
String filename = "kpisrc/getNowTime2.jsp";
File f = new File(filename);
if(f.exists()){
%>
<jsp:include page="<%=filename%>" ></jsp:include>
<%
}else{
out.print(filename + " not found.");
}
%>
Or another way to check file exists
if(null == application.getResource(filename))
by using try/catch?
<%
try {
%>
<jsp:include page="<%=filename%>" ></jsp:include>
<%
} catch(Exception e) {
%>
the file, <%=filename%>, is missing.
<%
}
%>
I am trying to get data from mysql and set the all data in xml format but I am unable to do this task. My code is:
abc.jsp
<%# page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<%
try
{
Connection connection=DBCreation.getConnection();
Stirng query="select latitude,longitude,time from jam_info";
Statement stmt=connection.createStatement();
ResultSet rs=stmt.executeQuery(query);
%></body>
</html>
<%# page contentType="text/xml" %>
<markers>
<marker>
<latitude></latitude>
<longitude></longitude>
<time>100</time>
</marker>
</markers>
I think this is wrong. Please guide me.
You can do something like this getXXX method will depend upon the type of the column holding the value.
<%# page language="java" contentType="text/xml; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%
Connection connection=DBCreation.getConnection();
Stirng query="select latitude,longitude,time from jam_info";
Statement stmt=connection.createStatement();
ResultSet rs=stmt.executeQuery(query);
response.setContentType("text/xml");
out.println("<markers>");
while(rs.next()) {
out.println("<marker>");
out.println("<latitude>" + rs.getXXX("latitude") + "</latitude>");
out.println("<longitude>" + rs.getXXX("longitude") + "</longitude>");
out.println("<time>" + rs.getXXX("time") + "</time>");
out.println("</marker>");
}
out.println("</markers>");
%>
Hope this helps.