Java解压zip到指定文件夹

青旅半醒 2023-10-11 20:12 37阅读 0赞

引入下方工具类。

package com.jinzhi.common.utils;
    
    import java.io.*;
    import java.nio.charset.Charset;
    import java.util.zip.ZipEntry;
    import java.util.zip.ZipInputStream;
    
    /**
     * 孟智超
     * 2022/12/8
     */
    public class UnzipUtils {
        
    
        /**
         * 解压zip压缩文件到指定目录
         *
         * @param zipPath zip压缩文件绝对路径
         * @param descDir 指定的解压目录
         */
        public static void unzipFile(String zipPath, String descDir) throws IOException {
        
            try {
        
                File zipFile = new File(zipPath);
                if (!zipFile.exists()) {
        
                    throw new IOException("要解压的压缩文件不存在");
                }
                File pathFile = new File(descDir);
                if (!pathFile.exists()) {
        
                    pathFile.mkdirs();
                }
                InputStream input = new FileInputStream(zipPath);
                unzipWithStream(input, descDir);
            } catch (Exception e) {
        
                throw new IOException(e);
            }
        }
    
        /**
         * 解压
         *
         * @param inputStream
         * @param descDir
         */
        public static void unzipWithStream(InputStream inputStream, String descDir) {
        
            if (!descDir.endsWith(File.separator)) {
        
                descDir = descDir + File.separator;
            }
            try (ZipInputStream zipInputStream = new ZipInputStream(inputStream, Charset.forName("GBK"))) {
        
                ZipEntry zipEntry;
                while ((zipEntry = zipInputStream.getNextEntry()) != null) {
        
                    String zipEntryNameStr = zipEntry.getName();
                    String zipEntryName = zipEntryNameStr;
                    if (zipEntryNameStr.contains("/")) {
        
                        String str1 = zipEntryNameStr.substring(0, zipEntryNameStr.indexOf("/"));
                        zipEntryName = zipEntryNameStr.substring(str1.length() + 1);
                    }
                    String outPath = (descDir + zipEntryName).replace("\\\\", "/");
                    File outFile = new File(outPath.substring(0, outPath.lastIndexOf('/')));
                    if (!outFile.exists()) {
        
                        outFile.mkdirs();
                    }
                    if (new File(outPath).isDirectory()) {
        
                        continue;
                    }
                    writeFile(outPath, zipInputStream);
                    zipInputStream.closeEntry();
                }
                System.out.println("======解压成功=======");
            } catch (IOException e) {
        
                System.out.println("压缩包处理异常，异常信息{}" + e);
            }
        }
    
        //将流写到文件中
        public static void writeFile(String filePath, ZipInputStream zipInputStream) {
        
            try (OutputStream outputStream = new FileOutputStream(filePath)) {
        
                byte[] bytes = new byte[4096];
                int len;
                while ((len = zipInputStream.read(bytes)) != -1) {
        
                    outputStream.write(bytes, 0, len);
                }
            } catch (IOException ex) {
        
                System.out.println("解压文件时，写出到文件出错");
            }
        }
    }

编写测试方法进行测试

//测试方法
        public static void main(String[] args) throws IOException {
        
    
            String zipPath = "D:/test/电子证书 (6).zip";
            String descDir = "D:/test/jy/";
    
            unzipFile(zipPath, descDir);
        }

将`D:/test/电子证书 (6).zip`压缩文件解压到`D:/test/jy/`文件夹下。

![在这里插入图片描述][a2ab0a34368c4581a2d2dc2f62db38e0.png]  
![在这里插入图片描述][f7ec5405739345d982e0157d26965fa2.png]

运行后

![在这里插入图片描述][e9718203b507431ca2b734c05228f8fb.png]  
![在这里插入图片描述][53e9f39e9f7b493ca8845c6e67d79dfa.png]

[a2ab0a34368c4581a2d2dc2f62db38e0.png]: https://img-blog.csdnimg.cn/a2ab0a34368c4581a2d2dc2f62db38e0.png
[f7ec5405739345d982e0157d26965fa2.png]: https://img-blog.csdnimg.cn/f7ec5405739345d982e0157d26965fa2.png
[e9718203b507431ca2b734c05228f8fb.png]: https://img-blog.csdnimg.cn/e9718203b507431ca2b734c05228f8fb.png
[53e9f39e9f7b493ca8845c6e67d79dfa.png]: https://img-blog.csdnimg.cn/53e9f39e9f7b493ca8845c6e67d79dfa.png