JAVA核心知识点--Zip压缩工具类（二）（解决中文乱码）

青旅半醒 2023-03-06 10:37 8阅读 0赞

在Java项目中需要对文件夹的内容进行Zip压缩，参考了网上的代码并修复了里面的一些问题，例如：中文乱码、目录不存在异常。

所使用的Jar包：**ant-\*.\*.\*.jar**和**log4j-\*.\*.\*.jar**，示例工程的CSDN下载地址：

[http://download.csdn.net/download/pengjunlee/10043115][http_download.csdn.net_download_pengjunlee_10043115]。

## ZipUtil工具类源码 ##

import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.Enumeration;
    
    import org.apache.log4j.Logger;
    import org.apache.tools.zip.ZipEntry;
    import org.apache.tools.zip.ZipFile;
    import org.apache.tools.zip.ZipOutputStream;
    
    public class ZipUtil {
    
    	private static final Logger logger = Logger.getLogger(ZipUtil.class);
    
    	/**
    	 * 压缩文件或目录
    	 * 
    	 * @param src
    	 *            要压缩的源文件或目录
    	 * @param dest
    	 *            生成的压缩文件全名，这里是绝对路径
    	 * @param encoding
    	 *            压缩时采用的编码格式
    	 * @throws IOException
    	 */
    	public static void zip(String src, String dest, String encoding) {
    		ZipOutputStream out = null;
    		if (isEmptyStr(src) || isEmptyStr(dest)) {
    			logger.error("invalid compress parameters...");
    			return;
    		}
    		if (isEmptyStr(encoding)) {
    			encoding = "UTF-8";
    		}
    		try {
    			File outFile = new File(dest);
    
    			File parentFile = outFile.getParentFile();
    			if (!parentFile.exists()) {
    				parentFile.mkdirs();
    			}
    			out = new ZipOutputStream(outFile);
    			out.setEncoding(encoding);
    			File fileOrDirectory = new File(src);
    
    			if (fileOrDirectory.isFile()) {
    				zipFileOrDirectory(out, fileOrDirectory, "");
    			} else {
    				File[] entries = fileOrDirectory.listFiles();
    				for (int i = 0; i < entries.length; i++) {
    					// 递归压缩，更新curPaths
    					zipFileOrDirectory(out, entries[i], "");
    				}
    			}
    
    		} catch (IOException e) {
    			logger.error(e.getMessage());
    		} finally {
    			if (null != out) {
    				try {
    					out.close();
    				} catch (IOException e) {
    					logger.error(e.getMessage());
    				}
    			}
    		}
    	}
    
    	private static boolean isEmptyStr(String str) {
    		return str == null || str.length() == 0;
    	}
    
    	/**
    	 * 递归压缩文件或目录
    	 * 
    	 * @param out
    	 *            压缩输出流对象
    	 * @param file
    	 *            要压缩的文件或目录对象
    	 * @param curPath
    	 *            当前压缩条目的路径，用于指定条目名称的前缀
    	 * @throws IOException
    	 */
    	private static void zipFileOrDirectory(ZipOutputStream out, File file,
    			String curPath) {
    		FileInputStream in = null;
    		try {
    			if (!file.isDirectory()) {
    				// 压缩文件
    				byte[] buffer = new byte[1024 * 1024];
    				int len;
    				in = new FileInputStream(file);
    
    				ZipEntry entry = new ZipEntry(curPath + file.getName());
    				out.putNextEntry(entry);
    
    				while ((len = in.read(buffer)) != -1) {
    					out.write(buffer, 0, len);
    				}
    				out.closeEntry();
    			} else {
    				// 压缩目录
    				File[] entries = file.listFiles();
    				for (int i = 0; i < entries.length; i++) {
    					// 递归压缩，更新curPath
    					zipFileOrDirectory(out, entries[i],
    							curPath + file.getName() + "/");
    				}
    			}
    		} catch (IOException e) {
    			logger.error(e.getMessage());
    		} finally {
    			if (null != in) {
    				try {
    					in.close();
    				} catch (IOException e) {
    					logger.error(e.getMessage());
    				}
    			}
    		}
    	}
    
    	/**
    	 * 解压缩
    	 * 
    	 * @param zipFileName
    	 *            源文件
    	 * @param outputDirectory
    	 *            解压缩后文件存放的目录
    	 * @throws IOException
    	 */
    	@SuppressWarnings({ "rawtypes" })
    	public static void unzip(String zipFileName, String outputDirectory,
    			String encoding) {
    
    		ZipFile zipFile = null;
    		if (isEmptyStr(encoding)) {
    			encoding = "UTF-8";
    		}
    		try {
    			zipFile = new ZipFile(zipFileName, encoding);
    			Enumeration zipEntries = zipFile.getEntries();
    			ZipEntry zipEntry = null;
    
    			File dest = new File(outputDirectory);
    			if (!dest.exists()) {
    				dest.mkdirs();
    			}
    
    			while (zipEntries.hasMoreElements()) {
    				zipEntry = (ZipEntry) zipEntries.nextElement();
    
    				String entryName = new String(zipEntry.getName().getBytes(
    						encoding), encoding);
    
    				InputStream in = null;
    				FileOutputStream out = null;
    
    				try {
    					if (zipEntry.isDirectory()) {
    						String name = zipEntry.getName();
    						name = name.substring(0, name.length() - 1);
    
    						File f = new File(outputDirectory + File.separator
    								+ name);
    						f.mkdirs();
    					} else {
    						int index = entryName.lastIndexOf("\\");
    						if (index != -1) {
    							File df = new File(outputDirectory + File.separator
    									+ entryName.substring(0, index));
    							df.mkdirs();
    						}
    						index = entryName.lastIndexOf("/");
    						if (index != -1) {
    							File df = new File(outputDirectory + File.separator
    									+ entryName.substring(0, index));
    							df.mkdirs();
    						}
    
    						File f = new File(outputDirectory + File.separator
    								+ zipEntry.getName());
    						// f.createNewFile();
    						in = zipFile.getInputStream(zipEntry);
    						out = new FileOutputStream(f);
    
    						int len;
    						byte[] buffer = new byte[1024 * 1024];
    
    						while ((len = in.read(buffer)) != -1) {
    							out.write(buffer, 0, len);
    						}
    						out.flush();
    					}
    				} catch (IOException e) {
    					logger.error("解压失败...");
    					logger.error(e.getMessage());
    				} finally {
    					if (null != in) {
    						try {
    							in.close();
    						} catch (IOException e) {
    							logger.error(e.getMessage());
    						}
    					}
    					if (null != out) {
    						try {
    							out.close();
    						} catch (IOException e) {
    							logger.error(e.getMessage());
    						}
    					}
    				}
    			}
    
    		} catch (IOException e) {
    			logger.error("解压失败...");
    			logger.error(e.getMessage());
    		} finally {
    			if (null != zipFile) {
    				try {
    					zipFile.close();
    				} catch (IOException e) {
    					logger.error(e.getMessage());
    				}
    			}
    		}
    
    	}
    
    	public static void main(String[] args) {
    		ZipUtil.zip("D:\\sourceFolder", "D:\\targetFolder\\test.zip", "GBK");
    		ZipUtil.unzip("D:\\targetFolder\\test.zip", "D:\\test", "GBK");
    
    	}
    
    }

[http_download.csdn.net_download_pengjunlee_10043115]: http://download.csdn.net/download/pengjunlee/10043115