how to install squid-2.5.STABLE13 on linux

March 9th, 2010

To build and install the Squid Cache, type:

% ./configure –prefix=/usr/local/squid
% make all
% make install
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validation problems when deploy an application in weblogic 10

March 3rd, 2010

Error message is:

Unable to access the selected application.
 
Exception in AppMerge flows' progression
 
Exception in AppMerge flows' progression
 
VALIDATION PROBLEMS WERE FOUND problem: cvc-complex-type.2.3: Element 'filter@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.: problem: cvc-complex-type.2.3: Element 'init-param@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.: problem: cvc-complex-type.2.3: Element 'init-param@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.: problem: cvc-complex-type.2.3: Element 'filter-mapping@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.:
 
VALIDATION PROBLEMS WERE FOUND problem: cvc-complex-type.2.3: Element 'filter@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.: problem: cvc-complex-type.2.3: Element 'init-param@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.: problem: cvc-complex-type.2.3: Element 'init-param@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.: problem: cvc-complex-type.2.3: Element 'filter-mapping@http://java.sun.com/xml/ns/javaee' with element-only content type cannot have text content.:

If you meet this error message, please check your web.xml and make sure it does not contain any unusual characters.

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open a port on linux server

January 13th, 2010

=========================================
iptables -A RH-Firewall-1-INPUT -p tcp -m state –state NEW -m tcp –dport 3690 -j ACCEPT
=========================================
RH-Firewall-1-INPUT is the name of the chain, and change 3690 to the port number you expect.

You must restart the service to make it effective:
[root@localhost ~]# service iptables restart

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make div align center

December 31st, 2009

use style as:
.style{margin-left:auto;margin-right:auto;}

or
.style{margin:0 auto;}
for short

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ORACLE UTL_RAW.BIT_AND

December 1st, 2009

eg.
select to_number(UTL_RAW.bit_and(to_char(1), ‘3′)) from dual;

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href and onclick method in ‘A’ tag

October 16th, 2009

How to invoke onclick method but not go to the page head.

1

<a href="#" onclick="javascript:jsMethod();return false;">a link</a>

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create a swing application

September 11th, 2009 
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import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
 
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.WindowConstants;
 
public class Test3 extends JApplet {
 
	public void init() {
		Container contentPane = getContentPane();
 
		Icon icon = new ImageIcon(ClassLoader.getSystemResource("swing.gif")); 
		JLabel label = new JLabel(icon);
//		java.net.URL codebase = getClass().getResource("../swing.gif");
//		JLabel label = new JLabel(new ImageIcon(codebase));
 
		contentPane.setLayout(new FlowLayout());
		contentPane.add(label);
	}
 
	public static void main(String args[]) {
		final JFrame f = new JFrame();
		JApplet applet = new Test3();
 
		applet.init();
 
		f.setContentPane(applet.getContentPane());
		f.setBounds(100, 100, 308, 199);
		f.setTitle("An Application");
		f.setVisible(true);
 
		f.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
 
		f.addWindowListener(new WindowAdapter() {
			public void windowClosed(WindowEvent e) {
				System.exit(0);
			}
		});
	}
}

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how to read a url

September 1st, 2009 
String s = request.getRequestURL().toString();
URL url = new URL(s);
BufferedReader bf = new BufferedReader(new InputStreamReader(url.openStream()));

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use kill with awk

August 27th, 2009

kill `ps -ef | awk ‘{if($11~/WorkOrderProcessor/) print$2}’`

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VI command – D & x

August 10th, 2009

D

The D command deletes from the cursor position to the end of the line. (D is a shortcut for d$.)

x

Often you want to delete only one or two characters. Just as r is a special change command to replace a single character, x is a special delete command to delete a single character. x deletes only the character the cursor is on.

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