java 解压缩zip

一时失言乱红尘 2022-04-06 11:10 269阅读 0赞

package com.activiti.test;
    
    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.tools.zip.ZipEntry;
    import org.apache.tools.zip.ZipFile;
    import org.apache.tools.zip.ZipOutputStream;
    
    public class ZipUtil {
    
    	/**
    	 * 压缩
    	 *
    	 * @param src
    	 *            源文件或者目录
    	 * @param dest
    	 *            压缩文件路径
    	 * @throws IOException
    	 */
    	public static void zip(String src, String dest) throws IOException {
    		ZipOutputStream out = null;
    		try {
    			File outFile = new File(dest);
    			out = new ZipOutputStream(outFile);
    			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 ex) {
    			ex.printStackTrace();
    		} finally {
    			if (out != null) {
    				try {
    					out.close();
    				} catch (IOException ex) {
    				}
    			}
    		}
    	}
    
    	/**
    	 * 递归压缩文件或目录
    	 *
    	 * @param out
    	 *            压缩输出流对象
    	 * @param fileOrDirectory
    	 *            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 fileOrDirectory, String curPath)
    			throws IOException {
    		FileInputStream in = null;
    		try {
    			if (!fileOrDirectory.isDirectory()) {
    				// 压缩文件
    				byte[] buffer = new byte[4096];
    				int bytes_read;
    				in = new FileInputStream(fileOrDirectory);
    
    				ZipEntry entry = new ZipEntry(curPath + fileOrDirectory.getName());
    				out.putNextEntry(entry);
    
    				while ((bytes_read = in.read(buffer)) != -1) {
    					out.write(buffer, 0, bytes_read);
    				}
    				out.closeEntry();
    			} else {
    				// 压缩目录
    				File[] entries = fileOrDirectory.listFiles();
    				for (int i = 0; i < entries.length; i++) {
    					// 递归压缩，更新curPaths
    					zipFileOrDirectory(out, entries[i], curPath + fileOrDirectory.getName() + "/");
    				}
    			}
    		} catch (IOException ex) {
    			ex.printStackTrace();
    			throw ex;
    		} finally {
    			if (in != null) {
    				try {
    					in.close();
    				} catch (IOException ex) {
    				}
    			}
    		}
    	}
    
    	/**
    	 * 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) throws IOException {
    
    		ZipFile zipFile = null;
    
    		try {
    			zipFile = new ZipFile(zipFileName);
    			Enumeration e = zipFile.getEntries();
    
    			ZipEntry zipEntry = null;
    
    			File dest = new File(outputDirectory);
    			dest.mkdirs();
    
    			while (e.hasMoreElements()) {
    				zipEntry = (ZipEntry) e.nextElement();
    
    				String entryName = zipEntry.getName();
    
    				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 c;
    						byte[] by = new byte[1024];
    
    						while ((c = in.read(by)) != -1) {
    							out.write(by, 0, c);
    						}
    						out.flush();
    					}
    				} catch (IOException ex) {
    					ex.printStackTrace();
    					throw new IOException("解压失败：" + ex.toString());
    				} finally {
    					if (in != null) {
    						try {
    							in.close();
    						} catch (IOException ex) {
    						}
    					}
    					if (out != null) {
    						try {
    							out.close();
    						} catch (IOException ex) {
    						}
    					}
    				}
    			}
    
    		} catch (IOException ex) {
    			ex.printStackTrace();
    			throw new IOException("解压失败：" + ex.toString());
    		} finally {
    			if (zipFile != null) {
    				try {
    					zipFile.close();
    				} catch (IOException ex) {
    				}
    			}
    		}
    
    	}
    
    	public static void main(String[] args) {
    		try {
    			// ZipUtil.zip("C:\\Users\\pactera\\Downloads", "F:\\test.zip");
    			ZipUtil.unzip("F:\\test.zip", "F:\\test");
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    
    	}
    
    }

maven 工程需引入jar  的坐标

<dependency>
    			<groupId>org.apache.ant</groupId>
    			<artifactId>ant</artifactId>
    			<version>1.9.6</version>
    		</dependency>

转载：[http://www.codeweblog.com/apache-ant%E8%BF%9B%E8%A1%8Czip%E8%A7%A3%E5%8E%8B%E7%BC%A9%E6%93%8D%E4%BD%9C%E7%A4%BA%E4%BE%8B%E5%88%86%E4%BA%AB/][http_www.codeweblog.com_apache-ant_E8_BF_9B_E8_A1_8Czip_E8_A7_A3_E5_8E_8B_E7_BC_A9_E6_93_8D_E4_BD_9C_E7_A4_BA_E4_BE_8B_E5_88_86_E4_BA_AB]

[http_www.codeweblog.com_apache-ant_E8_BF_9B_E8_A1_8Czip_E8_A7_A3_E5_8E_8B_E7_BC_A9_E6_93_8D_E4_BD_9C_E7_A4_BA_E4_BE_8B_E5_88_86_E4_BA_AB]: http://www.codeweblog.com/apache-ant%E8%BF%9B%E8%A1%8Czip%E8%A7%A3%E5%8E%8B%E7%BC%A9%E6%93%8D%E4%BD%9C%E7%A4%BA%E4%BE%8B%E5%88%86%E4%BA%AB/