如何使用“Zip文件系统提供程序”在Java中遍历ZIP文件？ [英] How to traverse a ZIP file in Java using "Zip File System Provider"?

问题描述

我有一个JSP应用程序，允许用户上传一个ZIP文件，然后应用程序将读取ZIP中的所有文件并将它们存储在MySQL中。

建议我决定使用Zip文件系统提供者来处理ZIP文件：

 路径zipPath = Paths.get zipFile.getSubmittedFileName（））; //返回ZIP文件的路径
 FileSystem fs = FileSystems.newFileSystem（zipPath，null）; //创建文件系统
  

我试着用下面的方法遍历它：

  for FileStore store：fs.getFileStores（））{
 System.err.println（Store：+ store.name（））; 
 
 
 
 
 
 $ b 
但是它只循环一次，返回 tmp。 zip 这是整个ZIP。我怎么提取物理图像文件一个接一个，所以我可以将它们存储在MySQL中。      Apache Commons Compress 模块可能可以帮助您遍历文件。
 
 
 
下面是一个可以遍历多个文件并提取字节内容的样本提取文件
 Sample  
 
 
  / * 
 *要更改此许可证标题，请在项目属性中选择许可证标题。 
 *要更改此模板文件，请选择工具|模板
 *并在编辑器中打开模板。 
 * / 
包测试; 
 import java.io.File; 
 import java.io.FileInputStream; 
 import java.io.FileNotFoundException; 
 import java.io.FileOutputStream; 
 import java.io.IOException; 
 import java.util.zip.ZipEntry; 
 import java.util.zip.ZipInputStream; 
 public class ZipTest {
 public static void main（String [] args）throws FileNotFoundException，IOException {
 String fileName =C：\\temp\\ECDS-File- Upload-Processed.zip; 
字符串destinationDir =C：\\temp\\\; 
 ZipInputStream zipInputStream = new ZipInputStream（new FileInputStream（fileName））; 
 ZipEntry zipEntry = zipInputStream.getNextEntry（）; 
 byte [] buffer = new byte [1024]; 
 while（zipEntry！= null）{
 String zipFileName = zipEntry.getName（）; 
文件extractFile =新文件（destinationDir + File.separator + zipFileName）; 
新文件（extractedFile.getParent（））。mkdirs（）; 
 FileOutputStream fos = new FileOutputStream（extractedFile）; 
 int len; （（len = zipInputStream.read（buffer））> 0）{
 fos.write（buffer，0，len）; 
} 
 fos.close（）; 
 zipEntry = zipInputStream.getNextEntry（）; 
} 
 zipInputStream.closeEntry（）; 
 zipInputStream.close（）; 
} 
} 
  
 
I have a JSP application that allows the user to upload a ZIP file and then the application will read all the files in the ZIP and store them in a MySQL.

Upon advice I decided to use "Zip File System Provider" to handle the ZIP file:
Path zipPath = Paths.get(zipFile.getSubmittedFileName());//returns the path to the ZIP file
FileSystem fs = FileSystems.newFileSystem(zipPath, null);//creates the file system
I tried to traverse it using:
for (FileStore store: fs.getFileStores()) {
         System.err.println("Store:  " + store.name());
}
However it loops only one time and returns tmp.zipwhich is the entire ZIP. How do I extract the physical image files one by one so I can store them in MySQL.
解决方案
The Apache Commons Compress  module probably can help you to iterate through the files.

Below is a sample extract that can iterate over multiple files and extract the byte contents
Sample
/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
public class ZipTest {
    public static void main(String[] args) throws FileNotFoundException, IOException {
        String fileName = "C:\\temp\\ECDS-File-Upload-Processed.zip";
        String destinationDir = "C:\\temp\\mango";
        ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(fileName));
        ZipEntry zipEntry = zipInputStream.getNextEntry();
        byte[] buffer = new byte[1024];
        while (zipEntry != null) {
            String zipFileName = zipEntry.getName();
            File extractedFile = new File(destinationDir + File.separator + zipFileName);
            new File(extractedFile.getParent()).mkdirs();
            FileOutputStream fos = new FileOutputStream(extractedFile);
            int len;
            while ((len = zipInputStream.read(buffer)) > 0) {
                fos.write(buffer, 0, len);
            }
            fos.close();
            zipEntry = zipInputStream.getNextEntry();
        }
        zipInputStream.closeEntry();
        zipInputStream.close();
    }
}


                        
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