Making Java Act Like A Form

[dougjrs]

Good Evening!

I am trying to create a "wrapper" for a search page. The search page
that I have supports searching by zip codes, but not proximity. What
I would like to do is create a front end for the search and then pass
a list of zip codes to the search program.

The problem that I am having is moving the person doing the search to
the results that come back from the search. I just present the client
with a blank page not the results page. My "vision" is that my user
would provide me a zip code, I will create a list of zip codes withing
x mines of that zip code and then pass it to the search program.

When you have a form you go to the action="" page when you click on
submit. What happens to me is that when I send the POST to the server
I stay on the page. I need it to move to the page that I am doing the
post to.


I have created a very simple page to test what is going on. Here is
the code:
<%@ page language="java" import="org.apache.commons.httpclient.*,
org.apache.commons.httpclient.methods.*" %>


<%
String url = "http://localhost:8080/printer.jsp";
try {
HttpClient client = new HttpClient();
PostMethod method = new PostMethod( url );

// Configure the form parameters
method.addParameter( "p", "Java" );

// Execute the POST method
int statusCode = client.executeMethod( method );
if( statusCode != -1 ) {
String contents = method.getResponseBodyAsString();
method.releaseConnection();
System.out.println( contents );
}
}

catch( Exception e ) {
e.printStackTrace();
out.println(e.toString());
}

%>

When I run this I get a 100% blank page. I want to go to the page
that the post is being done to.

Any help is appericated and thanks in advance for help!
Doug

 

[Daniel Pitts]

Good Evening!

I am trying to create a "wrapper" for a search page. The search page
that I have supports searching by zip codes, but not proximity. What
I would like to do is create a front end for the search and then pass
a list of zip codes to the search program.

The problem that I am having is moving the person doing the search to
the results that come back from the search. I just present the client
with a blank page not the results page. My "vision" is that my user
would provide me a zip code, I will create a list of zip codes withing
x mines of that zip code and then pass it to the search program.

When you have a form you go to the action="" page when you click on
submit. What happens to me is that when I send the POST to the server
I stay on the page. I need it to move to the page that I am doing the
post to.

I have created a very simple page to test what is going on. Here is
the code:
<%@ page language="java" import="org.apache.commons.httpclient.*,
org.apache.commons.httpclient.methods.*" %>

<%
String url = "http://localhost:8080/printer.jsp";
try {
HttpClient client = new HttpClient();
PostMethod method = new PostMethod( url );

// Configure the form parameters
method.addParameter( "p", "Java" );

// Execute the POST method
int statusCode = client.executeMethod( method );
if( statusCode != -1 ) {
String contents = method.getResponseBodyAsString();
method.releaseConnection();
System.out.println( contents );
}
}

catch( Exception e ) {
e.printStackTrace();
out.println(e.toString());
}

%>

When I run this I get a 100% blank page. I want to go to the page
that the post is being done to.

Any help is appericated and thanks in advance for help!
Doug

System.out.println does NOT print to the jsp output., try
"out.println" instead of "System.out.println"


%@ page language="java" import="org.apache.commons.httpclient.*,
org.apache.commons.httpclient.methods.*" %>

<%
String url = "http://localhost:8080/printer.jsp";
try {
HttpClient client = new HttpClient();
PostMethod method = new PostMethod( url );

// Configure the form parameters
method.addParameter( "p", "Java" );

// Execute the POST method
int statusCode = client.executeMethod( method );
if( statusCode != -1 ) {
String contents = method.getResponseBodyAsString();
method.releaseConnection();
out.println( contents );
}
}

catch( Exception e ) {
e.printStackTrace();
out.println(e.toString());
}

 

[Lew]

System.out.println does NOT print to the jsp output., try
"out.println" instead of "System.out.println"


%@ page language="java" import="org.apache.commons.httpclient.*,
org.apache.commons.httpclient.methods.*" %>

<%
String url = "http://localhost:8080/printer.jsp";
try {
HttpClient client = new HttpClient();
PostMethod method = new PostMethod( url );

// Configure the form parameters
method.addParameter( "p", "Java" );

// Execute the POST method
int statusCode = client.executeMethod( method );
if( statusCode != -1 ) {
String contents = method.getResponseBodyAsString();
method.releaseConnection();
out.println( contents );
}
}

catch( Exception e ) {
e.printStackTrace();
out.println(e.toString());
}

Why write this as JSP at all? You use nothing but scriptlet. If you wrote this
as a standard servlet, you'd probably find that existing methods like doPost()
will obviate the need to handle certain things yourself.

Take a gander at the Model-View-Controller, or "Model 2" paradigm for web
apps, as supported by Struts or JSF.

<http://java.sun.com/blueprints/guid...prise_applications_2e/web-tier/web-tier5.html>

The JSF section of <http://java.sun.com/javaee/5/docs/tutorial/doc/>:
<http://java.sun.com/javaee/5/docs/tutorial/doc/JSFIntro.html#wp114889>

<http://struts.apache.org/>

- Lew