java 压缩文件解压

以下是使用Java进行文件压缩和解压缩的示例代码：

1. 压缩文件：

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class FileCompressor {
    public static void compressFile(String sourceFilePath, String zipFilePath) throws IOException {
        File sourceFile = new File(sourceFilePath);
        try (FileOutputStream fos = new FileOutputStream(zipFilePath);
             ZipOutputStream zos = new ZipOutputStream(fos)) {
            compress(sourceFile, sourceFile.getName(), zos);
        }
    }

    private static void compress(File file, String fileName, ZipOutputStream zos) throws IOException {
        if (file.isDirectory()) {
            File[] files = file.listFiles();
            if (files != null && files.length > 0) {
                for (File f : files) {
                    compress(f, fileName + "/" + f.getName(), zos);
                }
            }
        } else {
            try (FileInputStream fis = new FileInputStream(file)) {
                ZipEntry zipEntry = new ZipEntry(fileName);
                zos.putNextEntry(zipEntry);
                byte[] buffer = new byte[1024];
                int length;
                while ((length = fis.read(buffer)) > 0) {
                    zos.write(buffer, 0, length);
                }
                zos.closeEntry();
            }
        }
    }
}

2. 解压文件：

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class FileDecompressor {
    public static void decompressFile(String zipFilePath, String destDirectory) throws IOException {
        File destDir = new File(destDirectory);
        if (!destDir.exists()) {
            destDir.mkdir();
        }
        try (ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFilePath))) {
            ZipEntry zipEntry = zis.getNextEntry();
            while (zipEntry != null) {
                String fileName = zipEntry.getName();
                File newFile = new File(destDirectory + File.separator + fileName);
                if (zipEntry.isDirectory()) {
                    newFile.mkdirs();
                } else {
                    new File(newFile.getParent()).mkdirs();
                    extractFile(zis, newFile);
                }
                zipEntry = zis.getNextEntry();
            }
        }
    }

    private static void extractFile(ZipInputStream zis, File newFile) throws IOException {
        try (FileOutputStream fos = new FileOutputStream(newFile)) {
            byte[] buffer = new byte[1024];
            int length;
            while ((length = zis.read(buffer)) > 0) {
                fos.write(buffer, 0, length);
            }
        }
    }
}

使用以上代码，你可以压缩和解压缩文件。你只需要调用相应的方法并传入文件路径即可。