java实现将ZIP压缩文件解压的工具类

以你之姓@ 2022-06-12 22:44 263阅读 0赞

package com.lanp;
    
    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.ZipException;
    import java.util.zip.ZipFile;
    import java.util.zip.ZipInputStream;
    
    /**
     * 解压ZIP压缩文件到指定的目录
     * @author LanP
     * @since 2012-3-13 8:57:18
     */
    public final class ZipToFile {
    	/**
    	 * 缓存区大小默认20480
    	 */
    	private final static int FILE_BUFFER_SIZE = 20480;
    	
    	private ZipToFile() {
    		
    	}
    	
    	/**
    	 * 将指定目录的ZIP压缩文件解压到指定的目录
    	 * @param zipFilePath		ZIP压缩文件的路径
    	 * @param zipFileName		ZIP压缩文件名字
    	 * @param targetFileDir		ZIP压缩文件要解压到的目录
    	 * @return flag				布尔返回值
    	 */
    	public static boolean unzip(String zipFilePath, String zipFileName, String targetFileDir){
    		boolean flag = false;
    		//1.判断压缩文件是否存在，以及里面的内容是否为空
    		File file = null;			//压缩文件(带路径)
    		ZipFile zipFile = null;
    		file = new File(zipFilePath + "/" + zipFileName);
    		System.out.println(">>>>>>解压文件【" + zipFilePath + "/" + zipFileName + "】到【" + targetFileDir + "】目录下<<<<<<");
    		if(false == file.exists()) {
    			System.out.println(">>>>>>压缩文件【" + zipFilePath + "/" + zipFileName + "】不存在<<<<<<");
    			return false;
    		} else if(0 == file.length()) {
    			System.out.println(">>>>>>压缩文件【" + zipFilePath + "/" + zipFileName + "】大小为0不需要解压<<<<<<");
    			return false;
    		} else {
    			//2.开始解压ZIP压缩文件的处理
    			byte[] buf = new byte[FILE_BUFFER_SIZE];
    			int readSize = -1;
    			ZipInputStream zis = null;
    			FileOutputStream fos = null;
    			try {
    				// 检查是否是zip文件
    				zipFile = new ZipFile(file);
    				zipFile.close();
    				// 判断目标目录是否存在，不存在则创建
    				File newdir = new File(targetFileDir);
    				if (false == newdir.exists()) {
    					newdir.mkdirs();
    					newdir = null;
    				}
    				zis = new ZipInputStream(new FileInputStream(file));
    				ZipEntry zipEntry = zis.getNextEntry();
    				// 开始对压缩包内文件进行处理
    				while (null != zipEntry) {
    					String zipEntryName = zipEntry.getName().replace('\\', '/');
    					//判断zipEntry是否为目录，如果是，则创建
    					if(zipEntry.isDirectory()) {
    						int indexNumber = zipEntryName.lastIndexOf('/');
    						File entryDirs = new File(targetFileDir + "/" + zipEntryName.substring(0, indexNumber));
    						entryDirs.mkdirs();
    						entryDirs = null;
    					} else {
    						try {
    							fos = new FileOutputStream(targetFileDir + "/" + zipEntryName);
    							while ((readSize = zis.read(buf, 0, FILE_BUFFER_SIZE)) != -1) {
    								fos.write(buf, 0, readSize);
    							}
    						} catch (Exception e) {
    							e.printStackTrace();
    							throw new RuntimeException(e.getCause()); 
    						} finally {
    							try {
    								if (null != fos) {
    									fos.close();
    								}
    							} catch (IOException e) {
    								e.printStackTrace();
    								throw new RuntimeException(e.getCause()); 
    							}
    						}
    					}
    					zipEntry = zis.getNextEntry();
    				}
    				flag = true;
    			} catch (ZipException e) {
    				e.printStackTrace();
    				throw new RuntimeException(e.getCause()); 
    			} catch (IOException e) {
    				e.printStackTrace();
    				throw new RuntimeException(e.getCause()); 
    			} finally {
    				try {
    					if (null != zis) {
    						zis.close();
    					}
    					if (null != fos) {
    						fos.close();
    					}
    				} catch (IOException e) {
    					e.printStackTrace();
    					throw new RuntimeException(e.getCause()); 
    				}
    			}
    		}
    		return flag;
    	}
    
    	/**
    	 * 测试用的Main方法
    	 */
    	public static void main(String[] args) {
    		String zipFilePath = "C:\\home";
    		String zipFileName = "lp20120301.zip";
    		String targetFileDir = "C:\\home\\lp20120301";
    		boolean flag = ZipToFile.unzip(zipFilePath, zipFileName, targetFileDir);
    		if(flag) {
    			System.out.println(">>>>>>解压成功<<<<<<");
    		} else {
    			System.out.println(">>>>>>解压失败<<<<<<");
    		}
    	}
    
    }

OK，TKS！