Java中如何进行文件的压缩与解压缩

在Java中，可以使用java.util.zip包中的类进行文件的压缩和解压缩。以下是一个简单的示例，演示了如何使用这些类来压缩和解压缩文件：

压缩文件

import java.io.*; import java.util.zip.*;  public class ZipFileExample {     public static void main(String[] args) {         String inputDir = "path/to/input/directory";         String zipFilePath = "path/to/output.zip";          try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFilePath))) {             File dir = new File(inputDir);             zipDirectory(dir, zos);         } catch (IOException e) {             e.printStackTrace();         }     }      private static void zipDirectory(File dir, ZipOutputStream zos) throws IOException {         if (!dir.isDirectory()) {             throw new IllegalArgumentException("Input must be a directory");         }          for (File file : dir.listFiles()) {             if (file.isDirectory()) {                 zipDirectory(file, zos);             } else {                 try (FileInputStream fis = new FileInputStream(file);                      ZipEntry ze = new ZipEntry(file.getName())) {                     zos.putNextEntry(ze);                      byte[] buffer = new byte[1024];                     int length;                     while ((length = fis.read(buffer)) > 0) {                         zos.write(buffer, 0, length);                     }                      zos.closeEntry();                 }             }         }     } } 

解压缩文件

import java.io.*; import java.util.zip.*;  public class UnzipFileExample {     public static void main(String[] args) {         String zipFilePath = "path/to/input.zip";         String outputDir = "path/to/output/directory";          try (ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFilePath))) {             ZipEntry ze = zis.getNextEntry();             while (ze != null) {                 String fileName = ze.getName();                 File newFile = new File(outputDir + File.separator + fileName);                  if (!ze.isDirectory()) {                     try (FileOutputStream fos = new FileOutputStream(newFile);                          BufferedOutputStream bos = new BufferedOutputStream(fos)) {                         byte[] buffer = new byte[1024];                         int length;                         while ((length = zis.read(buffer)) > 0) {                             bos.write(buffer, 0, length);                         }                     }                 } else {                     new File(outputDir + File.separator + fileName).mkdirs();                 }                  ze = zis.getNextEntry();             }         } catch (IOException e) {             e.printStackTrace();         }     } } 

请注意，这些示例仅用于演示目的，并且假设输入和输出路径是正确的。在实际应用中，您可能需要添加额外的错误处理和验证。