Displaying Current Date using Javascript

We can get the current date using the javascript build-in functions. To get the current date we have to use

 var dt new Date()  

in javascript.This creates one date type variable which holds all the date related informations like date,moth,year,time etc,.
Displaying this in any component or in alert will give information like

 Wed Aug 25 2010 13:42:41 GMT+0530 (India Standard Time)  

There are various methods are available in javascript to get the details only what we needed from this .We can use these methods like

 dt.getMonth();  
 dt.getDate();  

First one(getMonth()) gives only current month(0-11),getDate() gives the current date.Here is the sample to get MM/DD/YYYY for the current date in javascript

   var curr_date=new Date();   
   var month=curr_date.getMonth()+1;  
   var day=curr_date.getDate();  
   var year=curr_date.getYear();  
   // Y2K compliant  
   if (year < 1000) year +=1900;  
   document.getElementById(component).value = month + "/" + day + "/" + year;  

In this the getYear() method will return non Y2K compliant year(110 for 2010 ! ) to make this Y2K complian ,we need to add 1900 with that.

Creating a ZIP file in JAVA

Using ZipOutputStream and  Class in java.util.zip package we can craete an zip entry for the list of files.
The following gives the sample to create an zip file "outfile.zip" .This zip whill be created using the contents those given in the 'filenames' array.

1:  // These are the files to include in the ZIP file  
2:  String[] filenames = new String[]{"filename1", "filename2"};  
3:  // Create a buffer for reading the files  
4:  byte[] buf = new byte[1024];  
5:  try {  
6:    // Create the ZIP file  
7:    String outFilename = "outfile.zip";  
8:    ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outFilename));  
9:    // Compress the files  
10:    for (int i=0; i<filenames.length; i++) {  
11:      FileInputStream in = new FileInputStream(filenames[i]);  
12:      // Add ZIP entry to output stream.  
13:      out.putNextEntry(new ZipEntry(filenames[i]));  
14:      // Transfer bytes from the file to the ZIP file  
15:      int len;  
16:      while ((len = in.read(buf)) > 0) {  
17:        out.write(buf, 0, len);  
18:      }  
19:      // Complete the entry  
20:      out.closeEntry();  
21:      in.close();  
22:    }  
23:    // Complete the ZIP file  
24:    out.close();  
25:  } catch (IOException e) {  
26:  }  

Source : http://www.exampledepot.com

Replace All in Javascript

By Using regular expression with javascript replace function we can implement replace all functionality.here is the sample code block for javascript replace all functionlity.

 <Script Language="javascript">   
     var str = "Javascript replace test.";   
     var rs = str.replace(/is/g,"");   
     document.write(st);    
  </Script>   

here /is key for case insensitive search and /g recursive search

Printing Web page

Using javascript methods you can print the webpage contents or portion of webpage for your likes

 calling window.print() method invoke the browser's print dialog.

By setting appropriate styles in css classes you can hide/show particular parts of the display from printing.

To enable it include print.css only on printing time, for this you have to set media to "print"
so the particular css  stylesheet invoked only while printing

 <link rel="stylesheet" type="text/css" href="print.css" media="print" />  

setting media as screen sets the display for browser


sample print.css content

 div { display: none; }  
 #yourdiv { display: block; }  

update :

 @media print {  
   div.header {  
     display: none;  
   }  
   div.printable {  
     page-break-inside: avoid;  
     page-break-after: always;  
   }  
  }  

This will hide the div content those are not need to be printed.
page-break-inside: avoid; page-break-after: always; are the two properties allign print content in a manner.

Getting multiple out parameters from oracle procedures

By using "DataReadQuery " when calling oracle stored procedure you can get values for multiple out parameters


here is the code snippet one i found in net when searching for this concept

 JpaEntityManager jpaEntityManager = JpaHelper.getEntityManager(em);  
 Session session = jpaEntityManager.getActiveSession();  
 StoredProcedureCall spc = new StoredProcedureCall();  
 spc.setProcedureName(“two_args_out”);  
 spc.addNamedArgument(“x”);  
 spc.addNamedOutputArgument(“y”);  
 spc.addNamedOutputArgument(“z”);  
 DataReadQuery query = new DataReadQuery();  
 query.setCall(spc);  
 query.addArgument(“x”);  
 List args = new ArrayList();  
 args.add(“Wouter”);  
 List results = (List) session.executeQuery(query, args);  
 DatabaseRecord record = (DatabaseRecord)results.get(0);  
 String y = (String) record.get(“y”);  
 String z = (String) record.get(“z”);  

Before this i have used ValueReadQuery to get result set from the procedure.but it doesn't help with multiple out parameters ,it returns only one.

Access Java Static Methods in Struts2 Using OGNL

Access Java Static Methods in Struts2 Using OGNL is moved to www.tecrocks.com