解压缩文件

淡淡的烟草味﹌ 2022-03-31 05:08 334阅读 0赞

1、压缩某一文件夹下的文件

/**
         * 压缩某一文件夹下的文件
         * 
         * @param dirPath 带压缩的文件路径
         * @param filePath 文件压缩后的路径
         */
        public void zipFolder(String dirPath, String filePath) {
            File zipFile = new File(filePath);
            //如果存在，删除
            if (!zipFile.exists()) {
                zipFile.delete();
            }
            File dir = new File(dirPath);
            if (!dir.exists()) {
                throw new RuntimeException(dirPath + "不存在");
            }
            Project project = new Project();
            Zip zip = new Zip();
            zip.setProject(project);
            zip.setDestFile(zipFile);
    
            FileSet fileSet = new FileSet();
            fileSet.setProject(project);
            fileSet.setDir(dir);
            zip.addFileset(fileSet);
    
            zip.execute();
        }

2、解压

/**
         * 解压路径 zipPath 下的所有文件到 outputPath
         * 
         * @param zipPath 待压缩文件的路径
         * @param outputPath 压缩后的输出路径
         * @return  解压后的文件的路径
         * @throws IOException
         */
        public String unZip(String zipPath, String outputPath) throws IOException {
            String zipName = zipPath.substring(zipPath.lastIndexOf("\\"));
            ZipFile zipFile = new ZipFile(zipPath);
            Enumeration<ZipEntry> e = zipFile.getEntries();
            ZipEntry zipEntry = null;
            String dirPath = "";
            while (e.hasMoreElements()) {
                zipEntry = (ZipEntry) e.nextElement();
                if (zipEntry.isDirectory()) {
                    FileUtil.createDir(outputPath, zipName.substring(0, zipName.lastIndexOf(".")),
                        zipEntry.getName());
                } else {
                    if (zipEntry.getName().lastIndexOf("/") != -1) {
                        dirPath = zipEntry.getName().substring(0, zipEntry.getName().lastIndexOf("/"));
                    } else if(zipEntry.getName().lastIndexOf("\\") != -1){
                        dirPath = zipEntry.getName().substring(0, zipEntry.getName().lastIndexOf("\\"));
                    }
                    FileUtil.createDir(outputPath, zipName.substring(0, zipName.lastIndexOf(".")),
                        dirPath);
                    File file = new File(outputPath.concat(File.separator).concat(
                        zipName.substring(0, zipName.lastIndexOf("."))).concat(File.separator).concat(
                        zipEntry.getName()));
                    file.createNewFile();
                    InputStream in = zipFile.getInputStream(zipEntry);
                    FileOutputStream out = new FileOutputStream(file);
                    int c;
                    byte[] by = new byte[1024];
                    while ((c = in.read(by)) != -1) {
                        out.write(by, 0, c);
                    }
                    out.close();
                    in.close();
                }
            }
            return outputPath.concat(zipName.substring(0, zipName.lastIndexOf(".")));
        }