Out.print() in a jsp function

Hi
I have a jsp page. I have defined a function in it which requests the farm parameters through request.getParameter() and then print it using out.print() but it displays errors on request and out objects.
How can I use these objects in functions declared in a jsp page.
Thanks in advance
Sajid

Try Like this
<%!
public String aFunction(HttpServletRequest request,JspWriter out){
String sName = request.getParameter("Name");
out.println("Hai "+sName+" i think you got it now!!!!!!!!!!");
%>

Similar Messages

Calling out.println in a jsp function

Hi, i want to call out.println in a jsp function. That is i am using function like this
<%!
void MyFunction()
out.println("this is good");
%>
This code fails with error message: "out cannot be resolved"
Also i don't want to return value from the function, since i will later call this function recursive and display value at each instant.
Please suggest any solution.

<%!
void MyFunction(JSPWriter out)
out.println("this is good");
%>and then execute it with:
<% MyFunction(out): %>

Print Dialog in JSP

Dear All,
This my problem. From JSP on clicking a Button , a Print Dialog Box has to appear. On Clicking Print it has to print a Dynamically Generated HTML Page. My Architecture Goes LIke this. Jsp --> Servlet --> In servlet a HTML is generated.
When Clicking the Button in JSP, The page should not refresh again. It has to straight away display the Print Dialog Button. I can do this for displaying open-dialog box. now the requirement is to display the print dialog box.
this is the snap shot code i used in servlet to open the html. But Now Requirement is to Open a Print Dialog Box Instead of Open Dialog Box.
Can any one help me out in this regard.
public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException,ServletException
PrintWriter pw = response.getWriter();
response.setContentType("text/html");
response.setHeader("Content-disposition","attachment;filename=report.html");
pw.print(generateHTMLContent());
pw.close();
Post reply here / mail me @ [email protected]

If you don't mind restricting yourself to the newer browsers you can use the LINK tag to designate the servlet as an alternate html page that will be printed when a JavaScript function does a document.print.
Here is a link that may help:
http://www.htmlhelp.com/reference/html40/head/link.html
I have used this for intranet applications where I knew that all users would be using IE 5+ but I don't have an example readily available.

How To Make Void That Prints Something In JSP

hi Everyone I'm Very New To Java & JSP I'm Expert In PHP , Anyway . .
I want A Code like The Following Print Something Out :
<%@ page import = "java.io.*"%>
<%!
public void str_repeat(String str2,int num){
     int i;String FINAL="";
     for(i=0;i<num;i++)FINAL=FINAL+str2;
     System.out.print(FINAL);
%>
<%
str_repeat("SOMETHING",2);
%>And Please I don't Want Anyone to Come UP with A Function That Makes The String Repeat (( I Wan To Learn How To Make A Void That Outputs Something )) And Not A Function . .
notice : The Above Code Gives Nothing At All And When I Use
out.print Instead Of System.out.print It Gives Error

My Code Now Is As Follows :
<%@ page import = "java.io.*"%>
<%!
public void str_repeat(String str2,int num, JspWriter out){
     int i;String FINAL="";
     for(i=0;i<num;i++)FINAL=FINAL+str2;
      out.print(FINAL);
%>
<%
str_repeat("SOMETHING",2, out);
%> and it gives the following error :
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 17 in the jsp file: /index.jsp
Unhandled exception type IOException
14: public void str_repeat(String str2,int num, JspWriter out){
15:      int i;String FINAL="";
16:      for(i=0;i<num;i++)FINAL=FINAL+str2;
17:       out.print(FINAL);
18: }

Please help this clueless beginner with out.print syntax....

Please help a clueless beginner out!!!! :-)
I'm trying to build a dynamic table that functions as a calendar...(see http://www.oreilly.com/catalog/javacook/chapter/ch18.html for the basic idea and code structure).
Here's the problem...I want to make each date inside of the table a hyperlink to a new page. I figured out how to create the hyperlinks, but I CAN'T figure out how to create hyperlinks that pass variables to a new page.
Here's the code that works:
// Fill in numbers for the day of month.
for (int i = 1; i <= daysInMonth; i++)
out.print("<td>");
out.print("<a href=newpage.jsp>");
out.print(i);
out.print("</a>");
out.print("</td>");
Here's the code that DOESN'T work....but can serve as pseudo-code for what I want to do:
// Fill in numbers for the day of month.
for (int i = 1; i <= daysInMonth; i++)
out.print("<td>");
out.print("<a href=newpage.jsp?year=<%= yy %>&month=<%= months[mm] %>&date=<%= i %>>");
out.print(i);
out.print("</a>");
out.print("</td>");
<%= yy %>, <%= months[mm] %> are defined elsewhere in the code, and I want to use the current value of "i" from the loop.
So, if everything works like I want, the table will get created, and if yy=2002 and mm=January, then the hyperlinks will look like:
for day 1:
"/newpage.jsp?year=2002&month=January&date=1"
for day 2:
"/newpage.jsp?year=2002&month=January&date=2"
...for day 31:
"/newpage.jsp?year=2002&month=January&date=31"
Can someone please point me in the right direction? Is it even possible to do what I want? (I assume it is...but maybe I can't use out.print???)
Thanks!

Hi. The expression "<%=some_Java_expression %>" is the JSP tag, that returns string value to HTML code. You should use it in HTML block like:
<%String myname="Ivan"; %>
<body>
<p>My name is: <%=myname %></p>
But You tried to use it inside the string expression and it generated some code like this:
<a href="newpage.jsp?year=<%=yy%">...
, didn't it?
It invokes method out.print(" ... "), that prints this string value (but in the HTML block). So You tried to print something inside the print method. You should rewrite Your code like this:
for (int i = 1; i <= daysInMonth; i++)
out.print("<td>");
out.print("<a href=newpage.jsp?year="+yy+"&month="+months[mm]+"&date="+i+">");
out.print(i);
out.print("</a>");
out.print("</td>");
I used the + operator to join Your code for link tag with the values (yy, months[mm], i.
I hope it helps You,
bye.</a>

Print statement in JSP page after redirection

Hi,
I have written a JSP page and in that i am redirecting it to another page. Now after redirection i am printing a statement on the console. It is getting printed whereas when i am printing the same on the browser i am not able to print that. Please can any one tell me the difference between printing the same on the console and browser.
My first JSP page(one.jsp)
<%
     response.sendRedirect("two.jsp");
     out.println("After redirect");
     System.out.println("After out");
%>
My second JSP(two.jsp)
<%
     out.println("In two.jsp");
%>
Thanks in advance
regards
Prashanth

The sendRedirect sets a code in the HTTP response being sent to the client (I believe it is a 302 code but I am not sure off hand) and then proceeds to process the rest of the JSP on the server which is why the print statement shows up in the console.
The out.println writes to the HTTP response output stream. The client gets the response and sees the HTTP Header code telling it to make a new request so it stops processing the response message and sends a new request message which is why the out.println message is not seen in the browser.

How to use session variable in JSP function & How to use both JSP Servlet

Hi,
I am new to JSP and servlets
Still I am devloping a website in JSP. I am not mixing JSP with servlets, but I do create Java files for bean, logic and database works.
I try to keep the hard coding part out of JSP.
I dont how to use both JSP and Servlets in combination.
Hence If needed I write some functions in JSP.
but it gives me error
+<%! public void abc()+
+{+
int intUserId = Integer.valueOf((Integer) session.getAttribute("MySession_UserID"));
+}+
+%>+
Saying cannot find symbol session
1) So can u please tell how can I access session variables within JSP function
2) And also give me some links/tutorials about useing both JSP and Servlets in combination.
Thanks
Venkat

The application architecture when you use Servlets and JSP in a standard MVC pattern is explained here (under the heading "Integrating Servlets and JSP Pages") and here ...

How to output HTML code in methods without out.print

Hi,
I am trying to create a larger web-site with jsp. At first I tried to structure the page using include files. Since there is a limit for the length of if/else blocks, I now switched to using methods instead.
The Problem I have is that there a larger HTML blocks I dont want to print with out.print because that would make the source unreadable.
Unfortunately the <%= tag doesnt work in methods.
Here a code sample:
<%!
public void processOrder()
for(int i=1; i<10; i++)
out.print("<table>");
out.print("<tr>");
out.print("<td>Your Order:<td>");
%>
Isnt there a way to use a tag like <%= ?
Or are there other constructs then methods which can handle <%= ?
With PHP it would be no problem. So I wonder why there should be no way to do it with jsp.

I generally put dynamic output in a separate class file; you can then either instantiate the class in a scriptlet and call the appropriate method (which can either return a string or do all of your out.prints) or use a jsp:useBean tag.
Given the following class:
public class myHTML {
   public myHTML(){}
   public String renderTable(){
      String s = "";
      s += "<TABLE>\n";
      s += "<TR><TD>some content</TD></TR>\n";
      s += "</TABLE>\n";
      return s;
}You can then do either of the following in your JSP page:
1.<%
   myHTML mh = new myHTML;
   out.print(mh.renderTable());
%>2.<jsp:useBean id="somename" class="somepkg.myHTML" scope="request">
<%=somename.renderTable()%>
</jsp:useBean>Either will work, and all of the redundant out.print or String concat lines are moved out of the JSP.

Out.print performance problems?

Hi
I'm facing strange performance problems I would not expect generating long html pages on the fly.
I have a page that is approximately 30 to 40Kb long. Profiling code generation I obtain a 30 second time to process. I have excluded every server-side processing activity since I have also used a StringBuffer to accumulate all the html code to be flushed: generating the StringBuffer content require less than 1ms... flushing out the content with:
out.print(stb);
out.flush()
is taking 5 to 6 seconds. The same happens both on a development environment using CQ servlet engine, both in production where we are using CQ with JBoss as app server.
I tried the same operation on a simple tomcat installation with a JSP... less than 10 ms to generate the full page.
This problem is slowing down a lot performances.
The contents are generated inside a nested component included with a <cq:include> tag.
Anyone can give me suggestions on how to cut down a so big delay in html content generation?
thanks

I made further analysis and now I can give a clearer scenario.
The *very low* performances has been registered on CQ 5.2.1 when generating html code full of relative links. Every link *cost* big processing time. With 60-70 links the component ends up paying 3 to 4 seconds (too much!).
The same component on a CQ 5.4 instance takes approximately 500 milliseconds, still too much considering that without link the same html code is generated in less than 10 milliseconds.
The reason is clearly in the filters applied in the output pipeline --> link checker? remapping on links based on etc/map configurations?
How can I change configurations in order to avoid these performance problems?
thanks
Ignazio

Out.print() error

Hi am working on a jsp page which when ran gives an error:
"An error occurred at line: 58 in the jsp file: /BPMProcess.jsp
out cannot be resolved"
What could be the problem. I am s newbie. :)
thanks
<%@ page language="java" import="com.metastorm.ework.ecl.tp.*,com.metastorm.ework.ecl.*,com.metastorm.ework.ecl.forms.*,java.io.*"%>
<html>
<head>
<title>
Data submission
</title>
</head>
<body bgcolor="#ffffff">
<%
          String txtname;
          String txtpw;
          txtname= request.getParameter("txtname");
          txtpw= request.getParameter("txtpw");
          try
               ESession eWorkSession = new ESession();
               login(eWorkSession,txtname,txtpw);
          catch(ETPException e)
               ETPException nextException = e.getNextException();
               String      error = "";
               while (null != nextException)
                    error += nextException.toString();
                    nextException = nextException.getNextException();
%>
<%!
     void login(ESession eWorkSession, String username, String password) throws ETPException
          out.print("<h1>Welcome back "+username+"</h1>");
          try
               eWorkSession.login ( username, password);
          catch(ETPException e)
               ETPException nextException = e.getNextException();
               String      error = "";
               while (null != nextException)
                    error += nextException.toString();
                    nextException = nextException.getNextException();
%>
</body>
</html>

so something like this ?
<%@ page language="java" import="com.metastorm.ework.ecl.tp.*,com.metastorm.ework.ecl.*,com.metastorm.ework.ecl.forms.*,java.io.*"%>
<html>
<head>
<title>
Data submission
</title>
</head>
<body bgcolor="#ffffff">
<%
          String txtname;
          String txtpw;
          txtname= request.getParameter("txtname");
          txtpw= request.getParameter("txtpw");
          try
               ESession eWorkSession = new ESession();
               login(eWorkSession,txtname,txtpw);
               out.print("<h1>Welcome back "+txtname+"</h1>");
          catch(ETPException e)
               ETPException nextException = e.getNextException();
               String      error = "";
               while (null != nextException)
                    error += nextException.toString();
                    nextException = nextException.getNextException();
%>
<%!
     void login(ESession eWorkSession, String username, String password) throws ETPException
          try
               eWorkSession.login ( username, password);
          catch(ETPException e)
               ETPException nextException = e.getNextException();
               String      error = "";
               while (null != nextException)
                    error += nextException.toString();
                    nextException = nextException.getNextException();
%>
<%= username %>
</body>
</html>
that gives me an error:
An error occurred at line: 80 in the jsp file: /BPMProcess.jsp
username cannot be resolved
77:
78:
79: %>
80: <%= username %>
81:
82: </body>
83:

How can I show a System.out.println(""); into a JSP?

Is a simple doubt that would help me a lot to reach other thing that I wished reach with a JSP.
Thank you!!!

Hi!!!
Thank you to answer me......my question�is because�my problem is a little more complicated��let me tell you�.
My problem is that I wish to do some queries to a table of a Municipalities DB, I have read about that....and according with the exemples....my JSP...should be running and executing very well....but I haven�t had success with that...:(
My JSP file is:
<!doctype html public "-//w3c//dtd html 3.2//en">
<html>

<head>
<title>Query of Municipalities</title>
</head>
<body bgcolor=#FFFFFF>
<font face="Helvetica">
<h1>
<font color=#DB1260>
Municipalities List
</font>
</h1>
<%@ page import="
weblogic.db.jdbc.*,
weblogic.html.*,
java.sql.*
" %>
<p>
<%
Connection conn = null;
try {
Class.forName("weblogic.jdbc.pool.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:weblogic:pool:DESAPool");
catch (Exception e) {
e.printStackTrace();
Statement stmt = conn.createStatement();
stmt.execute("select * from cat_municipio");
ResultSet rs = stmt.getResultSet();
while (rs.next()) {
System.out.println(rs.getInt("cve_municipio") + " - " + rs.getInt("cve_sepomex") + " - " + rs.getString("desc_municipio"));
stmt.close();
conn.close();
%>
<p>Please call Mary with any updates ASAP!
<p>
<font size=-1>Copyright (c) 1999-2000 by BEA Systems, Inc. All Rights Reserved.
</font>
</font>
</body>
</html>
My result obtained is the following:
Municipalities List
Please call Mary with any updates ASAP!
Copyright (c) 1999-2000 by BEA Systems, Inc. All Rights Reserved.
I don�t obtain nothing.....is like DB table were without information......but in reality the DB table has information.....and I can obtain it with the following JSP:
<!doctype html public "-//w3c//dtd html 3.2//en">
<html>

<head>
<title>Query of Municipalities</title>
</head>
<body bgcolor=#FFFFFF>
<font face="Helvetica">
<h1>
<font color=#DB1260>
Municipalities List
</font>
</h1>
<%@ page import="
weblogic.db.jdbc.*,
weblogic.html.*,
java.sql.*
" %>
<p>
<%
Connection conn = null;
try {
Class.forName("weblogic.jdbc.pool.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:weblogic:pool:DESAPool");
// Fetch all records from the database in a TableDataSet
DataSet dSet = new TableDataSet(conn, "cat_municipio").fetchRecords();
TableElement tE = new TableElement(dSet);
tE.setBorder(1);
out.print(tE);
} catch (SQLException sqle) {
out.print("Sorry, the database is not available.");
out.print("Exception: " + sqle);
} catch (Exception e) {
out.print("Exception occured: " + e);
} finally {
if(conn != null)
try {
conn.close();
} catch(SQLException sqle) {}
%>
<p>Please call Mary with any updates ASAP!
<p>
<font size=-1>Copyright (c) 1999-2000 by BEA Systems, Inc. All Rights Reserved.
</font>
</font>
</body>
</html>
and with this JSP I obtain all the following information:
Municipalities List
CVE_MUNICIPIO CVE_SEPOMEX DESC_MUNICIPIO
1 1 ACAJETE
2 2 ACATENO
3 3 ACATLAN
4 4 ACATZINGO
5 5 ACTEOPAN
Now...I need that the first JSP work very well, because...with that way...I can do queries and obtain the needed results for showing them in the Browser......
So, I already find out�.that�any string that I send to the browser with System.out.println(); isn�t showed�.so it is the reason of my question�..how I can see my results of a query using a loop (like a for, while) resolving it....I think my problem would be resolved.
So...I hope you understand me, and you could help me please...thanks.....
Mary
P.D. I also attempted with the following JSP...but the result is the same....I don�t obtain none result...
<!doctype html public "-//w3c//dtd html 3.2//en">
<html>

<head>
<title>Query of Municipalities</title>
</head>
<body bgcolor=#FFFFFF>
<font face="Helvetica">
<h1>
<font color=#DB1260>
Municipalities List
</font>
</h1>
<%@ page import="
weblogic.db.jdbc.*,
weblogic.html.*,
java.sql.*
" %>
<p>
<%
Connection conn = null;
try {
Class.forName("weblogic.jdbc.pool.Driver").newInstance();
conn = DriverManager.getConnection("jdbc:weblogic:pool:DESAPool");
catch (Exception e) {
e.printStackTrace();
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("select CVE_MUNICIPIO, CVE_SEPOMEX, DESC_MUNICIPIO from cat_municipio");
while (rs.next()) {
System.out.println(rs.getInt(1) + " - " + rs.getInt(2) + " - " + rs.getString(3));
rs.close();
stmt.close();
conn.close();
%>
<p>Please call Mary with any updates ASAP!
<p>
<font size=-1>Copyright (c) 1999-2000 by BEA Systems, Inc. All Rights Reserved.
</font>
</font>
</body>
</html>

Out.print written to portlet within portal w/out redirect

I am trying to write output to only just the portlet portion of the portal
without having to do a redirect. What am I missing? The following is my
portlet JSP:

<%@ page extends="com.beasys.commerce.portal.admin.PortalJspBase"%>
<%@page import ="java.lang.String" %>
<%@page import ="java.util.*" %>
<%@page import ="java.net.*" %>
<%@page import ="java.io.*" %>
<%
try {
StringBuffer sb = new
StringBuffer("http://localhost:8080/servlet/com.clickaction.erm.events.Event
Servlet?test=test");
for(Enumeration e = request.getParameterNames(); e.hasMoreElements(); ){
String parameterName = (String)e.nextElement();
sb.append("&" + java.net.URLEncoder.encode(parameterName) + "=" +
java.net.URLEncoder.encode(request.getParameter(parameterName)));
String
host="http://localhost:8080/servlet/com.clickaction.erm.events.EventServlet?
com.clickaction.erm.events.EventHandler.EVENT.0=com.clickaction.erm.events.T
ransformerEvent&com.clickaction.erm.events.TransformerEvent.FILE=xml/surveys
/surveyresponsetransforms.xml&clientID=llbean&userID=abcd";
URL servletURL = new URL(sb.toString());
URLConnection con = servletURL.openConnection();
con.setDoInput(true);
con.setUseCaches(false);
con.setRequestProperty("Content-Type", "text/html");
InputStream in = con.getInputStream();
BufferedReader serverStream = new BufferedReader(new InputStreamReader(in));
String receiveString;
while((receiveString = serverStream.readLine()) != null){
out.print(receiveString);
in.close();
} catch (Exception e){
System.out.println("The connection is dead");
response.sendRedirect("http://localhost:7601/mybuybeans");
%>

Why can't you do
class Destination
private static Destination d = new Destination();
public static Destination getDestination()
return d;
private Destination()
public void otherMethods()
Now your go between just calls.
Destination.getDestination().otherMethods();

Out.print problem!!

hi
i'm new to the magic world of jsp, but this problem is very stupid!
this is my page code:
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" import="javax.*" errorPage="" %>
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<%!
public void connect()
    for(int i=0; i<10; i++)
        out.print("ciao");
}%>
%>
<%
connect();
%>
<body>
</body>
</html>and i get the following exception: "cannot resolve simbol: variable out"
i followed all the examples, but i don't know where i'm wrong
thanx all
sandro

Hi!
If you want to print on your web server's console you should write:
System.out.print("ciao");
But if you want to write it on the generated html page you should do something like this:
<%@ page contentType="text/html; charset=iso-8859-1" language="java" import="java.sql.*" import="javax.*" errorPage="" %>
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<%
for(int i=0; i<10; i++){
%>ciao<%}%>
<body></body></html>
just a question: how do yo do to write here in the forum with colours?
bye!
:)

What is the different between System.out.println and out.print

we move a project , jsp form to servlet to mysql db
suddenly we get Chinese input problem
on meantime only Thing I know is
if( chineseName!=null) {
                       chineseName= new String( chineseName.getBytes("ISO-8859-1"),"UTF-8");
                     out.print(chineseName); //display Chinese
                      System.out.println("Hello1"+chineseName ); // display unread symbol
             }I don't know why when we insert the value into db by StudentInsert(university_ID, surName, english_Name, chineseName, Address)
the db get the value from System.out.println
what setting decide my out put through System.out.println

Thank you for the reply!
after two days of search and guess.... I found out
for Web application , which under glassfish , you need to put your jsp page under WEB-INF,
other wise the server jsp turn your Chinese character that come from jsp request form to UTF8 symbol.
not ideal how to change the configuration in glassfish yet!

NullPointerException on out.print (String)

I am using weblogic 4.5.1 and jsp 1.1
          Within a jsp page:
          <% out.print (someString); %>
          When someString is null, the server is throwing a NullPointerException.
          The stack trace reveals that the server is trying to do a
          someString.length() call (Whatever for?). Must you check every string that
          you print our for null before you print it?
          Thanks for the help.
          Tim


The 'New to Java' forum is some doors further. Please make use of it for basic questions about the Java SE API which are in fact already answered in the javadocs. This has completely nothing to do with JSP/Servlet.

Out.print() in a jsp function

Similar Messages

Maybe you are looking for