Shulou(Shulou.com)06/02 Report--

Java how to create a Zip package and write to a file, this article describes in detail the corresponding analysis and solutions, hoping to help more partners who want to solve this problem to find a more simple and easy way.

What is Java? Java is an object-oriented programming language that can write desktop applications, Web applications, distributed systems, and embedded system applications.

Preface

In your work, you need to put some data into a compressed package of zip, and you can use ZipOutputStream. ZipOutputStream can write content directly to the zip package. Generally, ZipOutputStream is created by encapsulating a FileOutputStream, and then before each file is written, putNextEntry needs to be called once, then write is used to write data of type byte [], and colseEntry is used to end the packaging of this file when the writing is finished. Of course, you can also write the data directly into the compressed package through ZipOutputStream, and build the data in the compressed package.

Use public static void filetest () throws IOException {String txtPath = "D:\\ fileTest\\ image\\ 2.txt"; String zipPath = "D:\\ fileTest\\ image\\ 2.zip"; / / compressed package path String str = "Test test123abc"; / / data to be written / / create a compressed package ZipOutputStream zipOutputStream = new ZipOutputStream (new FileOutputStream (zipPath)) / / package a file FileWriter fileWriter = null; try {fileWriter = new FileWriter (txtPath); fileWriter.write (str); fileWriter.flush (); fileWriter.close ();} catch (IOException e) {log.error ("fileWriter", e) } / / build a FileInputStream FileInputStream fis = new FileInputStream (txtPath) for the files encapsulated above; / / create an empty file zipOutputStream.putNextEntry (new ZipEntry ("Request.json")) in the compressed package; / / write to the compressed file int len; byte [] buffer = new byte [1024] / / Byte array size adjustable / / read fis byte stream and transfer to buffer byte array. After reading, fis is empty while ((len = fis.read (buffer)) > 0) {zipOutputStream.write (buffer, 0, len);} byte [] b = new byte [1024]; int a = fis.read (b) / / close compressed package zipOutputStream.closeEntry (); fis.close (); zipOutputStream.flush (); zipOutputStream.close ();}

After running, the following files will be created:

A file called Request.json will be generated in the compressed package, as shown in the figure:

The content is consistent with the content in 2.txt, which is "Test test123abc".

The above method is: first create the 2.txt, then read the contents of the 2.txt, import it into the compressed package to form a file. With the same logic, we can read any other files and put them in a compressed package.

Import the content directly into the compressed package

Of course, we can also import the data directly into the compressed package. The implementation is as follows:

Public static void filetest () throws IOException {String zipPath = "D:\\ fileTest\\ image\\ 3.zip"; / / compressed package path String str1 = "Test test123abc"; / / data to be written String str2 = "Test 2"; String Name1 = StringUtils.join ("File .json") / / files in the package String Name2 = StringUtils.join ("file/ file 1.json"); / / create files in the file directory in the package / / create files in the package ZipOutputStream zipOutputStream = new ZipOutputStream (new FileOutputStream (zipPath)); / / create files in the package zipOutputStream.putNextEntry (new ZipEntry (Name1)); byte [] bytes1 = str1.getBytes (StandardCharsets.UTF_8) ZipOutputStream.write (bytes1, 0, bytes1.length); / / write data to the file in the compressed package zipOutputStream.closeEntry (); zipOutputStream.putNextEntry (new ZipEntry (Name2)); byte [] bytes2 = str2.getBytes (StandardCharsets.UTF_8); zipOutputStream.write (bytes2, 0, bytes2.length); zipOutputStream.closeEntry (); zipOutputStream.flush (); zipOutputStream.close ();}

The above is to directly convert the String type data into an byte array, import it into the compressed package, and form two files:

In the file folder is the file 1.json, the content is "Test 2", and the content of the file .json is "Test test123abc".

This is the answer to the question about how to create a Zip package for Java and write it to a file. I hope the above content can be of some help to you. If you still have a lot of doubts to solve, you can follow the industry information channel to learn more about it.

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