springboot Java 7z 高效率压缩文件(org.apache.commons.compress.archivers.sevenz)

看一下战果

直接上代码

<--maven配置-->

       
     <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-compress</artifactId> <version>1.12</version> </dependency> <dependency> <groupId>org.tukaani</groupId> <artifactId>xz</artifactId> <version>1.5</version> </dependency>
public class CompressUtil {
    // 测试
    public static void main(String[] args) {
        String path = "D:\\Test\\pdf\\2020-01-08\\92b4809959d5478ba5ad5dc676444c06.pdf";
//        path = "D:\\Test\\pdf\\2020-01-08\\12.txt";
        String path2 = "D:\\Test\\pdf\\2020-01-08\\92b4809959d5478ba5ad5dc676444c06z.7z";

        try {
            Compress7z(path,path2);
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println(e.getMessage());
        }

    }

    /**
     * 7z文件压缩
     *
     * @param inputFile  待压缩文件夹/文件名
     * @param outputFile 生成的压缩包名字
     */

    public static void Compress7z(String inputFile, String outputFile) throws Exception {
        File input = new File(inputFile);
        if (!input.exists()) {
            throw new Exception(input.getPath() + "待压缩文件不存在");
        }
        SevenZOutputFile out = new SevenZOutputFile(new File(outputFile));

        compress(out, input, null);
        out.close();
    }

    /**
     * @param name 压缩文件名,可以写为null保持默认
     */
    //递归压缩
    public static void compress(SevenZOutputFile out, File input, String name) throws IOException {
        if (name == null) {
            name = input.getName();
        }
        SevenZArchiveEntry entry = null;
        //如果路径为目录(文件夹)
        if (input.isDirectory()) {
            //取出文件夹中的文件(或子文件夹)
            File[] flist = input.listFiles();

            if (flist.length == 0)//如果文件夹为空,则只需在目的地.7z文件中写入一个目录进入
            {
                entry = out.createArchiveEntry(input,name + "/");
                out.putArchiveEntry(entry);
            } else//如果文件夹不为空,则递归调用compress,文件夹中的每一个文件(或文件夹)进行压缩
            {
                for (int i = 0; i < flist.length; i++) {
                    compress(out, flist[i], name + "/" + flist[i].getName());
                }
            }
        } else//如果不是目录(文件夹),即为文件,则先写入目录进入点,之后将文件写入7z文件中
        {
            FileInputStream fos = new FileInputStream(input);
            BufferedInputStream bis = new BufferedInputStream(fos);
            entry = out.createArchiveEntry(input, name);
            out.putArchiveEntry(entry);
            int len = -1;
            //将源文件写入到7z文件中
            byte[] buf = new byte[1024];
            while ((len = bis.read(buf)) != -1) {
                out.write(buf, 0, len);
            }
            bis.close();
            fos.close();
            out.closeArchiveEntry();
        }
    }

}

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转载自www.cnblogs.com/wzl521224/p/12172623.html