Java operation ZIP file

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When multiple files are transmitted over the network, it will take a lot of time and consume more computer system resources. If we package multiple files and transfer them again, it will save a lot of computer resources. Here, I will show you how to read, decompress, and create ZIP files. Of course, here is a brief introduction. You need to implement the ZIP file in many details. For Java operations on zips, the main function is to use classes in the java.util.zip package.

1. Read ZIP files

The zipfile class is used to read entries from a zip file. Therefore, you must first create a zipfile object, and then use the entries () method of the zipfile object to obtain all entries in the ZIP file. The Code is as follows:

 
 

  
  
Public static void readzipfile (File file ){
  
  
Try {
  
  
Zipfile = new zipfile (File); // create a zipfile object
  
  
System. Out. println (zipfile. getname (); // print the ZIP file path.
  
  
System. Out. println ("Zip entries:" + zipfile. Size (); // print the number of zip entries
  
  

  
  
Enumeration <? Extends zipentry> en = zipfile. Entries ();
  
  
Zipentry entry;
  
  
While (EN. hasmoreelements ()){
  
  
Entry = en. nextelement ();
  
  
System. Out. println (entry. getname ());
  
  
}
  
  
Zipfile. Close ();
  
  
} Catch (zipexception e ){
  
  
System. Out. println (file. getname () + "compressed file error ");
  
  
} Catch (ioexception e ){
  
  
System. Out. println (file. getname () + "An error occurred while reading the file ");
  
  
}
  
  
}