java - 使用java解压文件

Question

public void unZipFile(String zipFileLocation, String outputFolder) {
    logger.info("ZipFileLocation: "+zipFileLocation);
    logger.info("OutputLocation: "+outputFolder);

    File dir = new File(outputFolder);
    // create output directory if it doesn't exist
    if(!dir.exists()) dir.mkdirs();
    FileInputStream fis;
    //buffer for read and write data to file
    byte[] buffer = new byte[1024];
    try {
        fis = new FileInputStream(zipFileLocation);
        ZipInputStream zis = new ZipInputStream(fis);
        ZipEntry ze = zis.getNextEntry();
        while(ze != null){
            String fileName = ze.getName();
            File newFile = new File(outputFolder + File.separator + fileName);
            System.out.println("Unzipping to "+newFile.getAbsolutePath());
            //create directories for sub directories in zip
            new File(newFile.getParent()).mkdirs();
            FileOutputStream fos = new FileOutputStream(newFile);
            int len;
            while ((len = zis.read(buffer)) > 0) {
                fos.write(buffer, 0, len);
            }
            fos.close();
            //close this ZipEntry
            zis.closeEntry();
            ze = zis.getNextEntry();
        }
        //close last ZipEntry
        zis.closeEntry();
        zis.close();
        fis.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

这是我用来将文件夹解压缩到特定位置的代码。一旦我执行此过程，我就会收到以下异常。请指教为什么会出现这个问题？

 java.util.zip.ZipException: invalid entry size (expected 3173388 but got 3173359 bytes)
 [java]     at java.util.zip.ZipInputStream.readEnd(ZipInputStream.java:403)
 [java]     at java.util.zip.ZipInputStream.read(ZipInputStream.java:195)
 [java]     at java.io.FilterInputStream.read(FilterInputStream.java:107)
 [java]     at com.shipxpress.irf.server.service.impl.IrfServiceImpl.unZipFile(IrfServiceImpl.java:1020)
 [java]     at com.shipxpress.irf.server.service.impl.IrfServiceImpl.executeFileTransferProcess(IrfServiceImpl.java:1310)
 [java]     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 [java]     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 [java]     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 [java]     at java.lang.reflect.Method.invoke(Method.java:606)

如果有人能帮助我解决这个问题，我真的很感激

谢谢

Answer 1

使用这个库www.lingala.net/zip4j/

将此 jar 文件添加到应用程序的 lib 文件夹中。

像这样检查您的导入

导入net.lingala.zip4j.core.ZipFile;

导入net.lingala.zip4j.exception.ZipException;

导入net.lingala.zip4j.model.FileHeader;

使用下面的方法

解压缩(“/sdcard/file.zip”，“/sdcard/unzipFolder”)

  public static void unzip(String Filepath, String DestinationFolderPath) {

        try {
            ZipFile zipFile = new ZipFile(Filepath);
            List fileHeaders = zipFile.getFileHeaders();
            for(int i=0;i<fileHeaders.size();i++) {
                FileHeader  fileHeader=(FileHeader) fileHeaders.get(i);
                String fileName = fileHeader.getFileName();
                Log.d(TAG,fileName);
                if (fileName.contains("\\")) {
                    fileName=fileName.replace("\\","\\\\");
                    String[] Folders=fileName.split("\\\\");
                    StringBuilder newFilepath=new StringBuilder();
                    newFilepath.append(DestinationFolderPath);
                    for (int j=0;j<Folders.length-1;j++){
                        newFilepath.append(File.separator);
                        newFilepath.append(Folders[j]);
                    }
                    zipFile.extractFile(fileHeader, newFilepath.toString(),null,Folders[Folders.length-1]);
                }else {
                    zipFile.extractFile(fileHeader,DestinationFolderPath);
                }
            }
        } catch (ZipException e) {
            e.printStackTrace();
        }
    }