JDK实现压缩、解压

冷不防 2024-03-22 18:26 32阅读 0赞

1.JDK实现压缩、解压

1.1 JDK实现压缩

/**
    	*压缩成zip包
    	* @author Benjamin
    	* @date 
    	* @version 1.0.0
    	* @description 压缩成zip包
    	* @param sourceFilePath 源文件路径
    	* @param targetZipFilePath 压缩包的路径,需要指定到压缩包的名字和压缩包后缀
    	* @return void
    	*/
    	public static void zipCompress(String sourceFilePath, String targetZipFilePath) throws IOException {
    		File sourceFile = new File(sourceFilePath);
    		List<File> compressFileList = new ArrayList<>();
    		if (sourceFile.isDirectory()) {
    			// 获取包里面的所有文件
    			compressFileList.addAll(getFiles(sourceFilePath));
    		} else {
    			// 文件直接添加
    			compressFileList.add(sourceFile);
    		}
    		try (ZipOutputStream zipOutputStream = new ZipOutputStream(new FileOutputStream(targetZipFilePath))){
    			ZipEntry zipEntry = null;
    			for (int i = 0; i < compressFileList.size(); i++) {
    				File file = compressFileList.get(i);
    				// 创建一个新的文件条目
    				//zipEntry = new ZipEntry(file.getName()); // 文件名字
    				//zipEntry = new ZipEntry(file.getAbsolutePath()); // 绝对路径
    
    				/*if (sourceFile.isDirectory()) {
    					String prefix = StringUtils.substringBeforeLast(sourceFile.getAbsolutePath(), "\\");
    					prefix = prefix + "\\";
    					// 相对路径
    					String compressPath = StringUtils.substringAfterLast(file.getAbsolutePath(), prefix);
    					// 创建一个新的文件条目
    					zipEntry = new ZipEntry(compressPath);
    				} else {
    					zipEntry = new ZipEntry(file.getAbsolutePath());
    				}*/
    
                    String prefix = StringUtils.substringBeforeLast(sourceFile.getAbsolutePath(), "\\");
    				prefix = prefix + "\\";
    					// 相对路径
    				String compressPath = StringUtils.substringAfterLast(file.getAbsolutePath(), prefix);
    					// 创建一个新的文件条目
    				zipEntry = new ZipEntry(compressPath);
    
    				zipOutputStream.putNextEntry(zipEntry);
    				// 将文件写入压缩包
    				BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));
    				int length = 0;
    				byte[] bytes = new byte[1024];
    				while ((length = bis.read(bytes)) != -1) {
    					zipOutputStream.write(bytes, 0, bytes.length);
    				}
    				bis.close();
    				// 关闭当前zipEntry
    				zipOutputStream.closeEntry();
    			}
    		} catch (IOException e) {
    			throw new IOException(e);
    		}
    	}
    
    	/**
    	*获取文件的路径
    	* @author Benjamin
    	* @date 
    	* @version 1.0.0
    	* @description 获取文件的路径
    	* @param filePath 文件路径
    	* @return java.util.List<java.io.File>
    	*/
    	public static List<File> getFiles(String filePath) {
    		List<File> fileList = new ArrayList<>();
    		File file = new File(filePath);
    		if (file.exists()) {
    			File[] files = file.listFiles();
    			for (File f : files) {
    				if (f.isDirectory()) {
    					fileList.addAll(getFiles(f.getAbsolutePath()));
    				} else {
    					// 添加文件的路径
    					fileList.add(f);
    				}
    			}
    		}
    		return fileList;
    	}

1.2 JDK实现解压

/**
    	*解压zip包
    	* @author Benjamin
    	* @date 
    	* @version 1.0.0
    	* @description 解压zip格式压缩包
    	* @param zipPath 需要解压的包路径,指定到包的名字和后缀
    	* @param unZipPath  解压后的包路径
    	* @return void
    	*/
    	public static void zipDecompress(String zipPath, String unZipPath) throws Exception {
    		try (ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(zipPath))){
    			ZipEntry zipEntry = null;
    			while ((zipEntry = zipInputStream.getNextEntry()) != null) {
    				// zipEntry.getName() 是相对路径
    				File zipFile = new File(unZipPath, zipEntry.getName());
    				if (zipEntry.isDirectory() && !zipFile.exists()) {
    					zipFile.mkdirs();
    				} else {
    					if (!zipFile.getParentFile().exists()) {
    						zipFile.getParentFile().mkdirs();
    					}
    					FileOutputStream fileOutputStream = new FileOutputStream(zipFile);
    					int len = 0;
    					byte[] bytes = new byte[1024];
    					while ((len = zipInputStream.read(bytes)) != -1) {
    						fileOutputStream.write(bytes, 0, len);
    					}
    					fileOutputStream.close();
    				}
    				zipInputStream.closeEntry();
    			}
    		} catch (Exception e) {
    			throw new Exception("解压zip包失败！");
    		}
    	}