java FtpClient API

commons-net-1.0.0.jar download from
http://www.ibiblio.org/pub/packages/maven2/commons-net/commons-net/1.0.0/

API
http://jakarta.apache.org/commons/net/api/org/apache/commons/net/ftp/FTPClient.html

[java] Read properties

Enumeration e =System.getProperties().propertyNames();
Object obj;        
while( e.hasMoreElements()){
    obj = e.nextElement();            
    System.out.println(obj + " = " + System.getProperty(obj.toString()));
}

javascript simulated query string

function getRequest(requestName) 
{ 
     var url=location.search.toLowerCase(); 
     var Request = new Object(); 

     if(url.indexOf("?")!=-1){ 
          var str=url.substr(1);
          strs = str.split("&"); 
          for(var i=0;i＜strs.length;i++){    
               Request[strs[i].split("=")[0]]=unescape(strs[i].split("=")[1]);
          }    
     } 
     return(Request[requestName]); 

} 

javascript return value to opener

if (window.opener && !window.opener.closed)  
    window.opener.document.Form1.fileName.value ="aaa"; 

Export file from web page (JSP)

<%@page contentType="text/html;charset=MS950"%>
<%@page pageEncoding="MS950"%>
<%
    String m_filename = "hello.txt ";
    String m_content = "Hello\nWorld";
    response.addHeader("Content-Disposition", "attachment; filename=" + m_filename);
    response.setContentType("text/plain"); 
    response.getWriter().write(m_content);
%>

prevent right click(Javascript)

var message="Function Disabled!";

function clickIE4(){
　　if (event.button==2){
　 //alert(message);
　 return false;
}
}

function clickNS4(e){
　　if (document.layersdocument.getElementById&&!document.all){
　　　　 if (e.which==2e.which==3){
　　　　//alert(message); return false; } } }
if (document.layers){
　document.captureEvents(Event.MOUSEDOWN);
　document.onmousedown=clickNS4; }
　else if (document.all&&!document.getElementById){
　 document.onmousedown=clickIE4;
}
document.oncontextmenu=new Function("return false")

Some funcation about file operation in Java

http://javaalmanac.com/egs/java.io/CopyFile.html

How to add audio file in HTML img tag?

Add audio file in your img tag, such that your picture can sing.
It is funny.

Add some javascript in web control

How to check something before clicking web control button?

In client side:(javascript)

function Check_function(){
  if(checkIsOk)
    return true;
  else
  return false;
}

In Server side:
button1 is a ID of web control button.

button1Attributes.Add("onclick","if(Check_function()==false) return false;");

Java : Convert from type X to type Y

[refer from http://www.rgagnon.com/javadetails/java-0004.html]

Convert from type X to type Y

integer to String :

int i = 42; String str = Integer.toString(i); or String str = "" + i

double to String :

String str = Double.toString(i);

long to String :

String str = Long.toString(l);

float to String :

String str = Float.toString(f);

String to integer :

str = "25"; int i = Integer.valueOf(str).intValue(); or int i = Integer.parseInt(str);

String to double :

double d = Double.valueOf(str).doubleValue();

String to long :

long l = Long.valueOf(str).longValue(); or long l = Long.parseLong(str);

String to float :

float f = Float.valueOf(str).floatValue();

decimal to binary :

int i = 42; String binstr = Integer.toBinaryString(i);

decimal to hexadecimal :

int i = 42; String hexstr = Integer.toString(i, 16); or String hexstr = Integer.toHexString(i); or (with leading zeroes and uppercase) public class Hex { public static void main(String args[]){ int i = 42; System.out.print (Integer.toHexString( 0x10000 | i).substring(1).toUpperCase()); } }

hexadecimal (String) to integer :

int i = Integer.valueOf("B8DA3", 16).intValue(); or int i = Integer.parseInt("B8DA3", 16);

ASCII code to String

int i = 64; String aChar = new Character((char)i).toString();

integer to ASCII code (byte)

char c = 'A'; int i = (int) c; // i will have the value 65 decimal

To extract Ascii codes from a String

String test = "ABCD"; for ( int i = 0; i < test.length(); ++i ) { char c = test.charAt( i ); int j = (int) c; System.out.println(j); }

integer to boolean

b = (i != 0);

boolean to integer

i = (b)?1:0;

note :To catch illegal number conversion, try using the try/catch mechanism.

try{ i = Integer.parseInt(aString); } catch(NumberFormatException e) { }

How to clean the IE browser cache?

<script language="javascript">
document.execCommand("ClearAuthenticationCache","false");
</script>