Question

这似乎是沉浸式的重复问题，但我反复检查并发布了解决方案。如果文件未在该限制内完成，我必须从5 MB限制的源文件目录中生成一个zip，必须生成另一个zip，依此类推。

每个zip文件的大小不得超过5 MB
如果每个zip的最大容量为4.0 MB，下一个文件为1.5 MB，则每个zip的完整大小均接近5 MB，必须从源文件中选择另一个文件以适合zip大小限制。不考虑将内容压缩到最大4.0 MB的情况。我已经尝试了以下代码。

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class QDE_ZIP {
    public static String createZIP() {
        try {
            String zipFileName = "abc";
            String directoryPath = "/Users/Music";
            final int BUFFER = 104857600; // 100MB

            final long MAX_ZIP_SIZE = 5242880L; //5 MB
            long currentSize = 0;
            int zipSplitCount =0;
            File folder = new File("/Users/source/");
            List<String> files = new ArrayList<>();
            //folder.listFiles().
            for (File f : folder.listFiles()) {
                if (f.isFile() && !f.isDirectory()) {
                    files.add(f.getAbsolutePath());
                }
            }
            //String files[] = filesToZip.split(",");
            if (!directoryPath.endsWith("/")) {
                directoryPath = directoryPath + "/";
            }
            byte fileRAW[] = new byte[BUFFER];
            ZipOutputStream zipOut = new ZipOutputStream(new FileOutputStream(directoryPath + zipFileName.toUpperCase()));
            ZipEntry zipEntry;
            FileInputStream entryFile;
            System.out.println("files list size:"+files.size());
            for (String aFile : files) {
                 System.out.println("files list aFile:"+aFile);
                zipEntry = new ZipEntry(aFile);
                if (currentSize >= MAX_ZIP_SIZE)
                {
                    zipSplitCount ++;
                    //zipOut.closeEntry();
                    zipOut.close();
                    zipOut = new ZipOutputStream(new FileOutputStream(directoryPath + zipFileName.toLowerCase().replace(".zip", "_"+zipSplitCount+".zip").toUpperCase()));
                    currentSize = 0;
                }
                zipOut.putNextEntry(zipEntry);
                entryFile = new FileInputStream(directoryPath + aFile);
                int count;
                while ((count = entryFile.read(fileRAW, 0, BUFFER)) != -1) {
                    zipOut.write(fileRAW, 0, count);

                    System.out.println("number of Bytes read = " + count);
                }
                entryFile.close();
                zipOut.closeEntry();
                currentSize += zipEntry.getCompressedSize();
            }
            zipOut.close();
            System.out.println(directoryPath + " -" + zipFileName + " -Number of Files = " + files.size());
        } catch (FileNotFoundException e) {
            return "FileNotFoundException = " + e.getMessage();
        } catch (IOException e) {
            return "IOException = " + e.getMessage();
        } catch (Exception e) {
            return "Exception = " + e.getMessage();
        }
        return "1";}public static void main(String[] args)  throws Exception {   
        System.out.println("started:");createZIP();}}




****and another code :

how to create java zip archives with a max file size limit

我在等一个更好的例子。您将接受您的代码和建议。

如何使用总zip大小限制来压缩文件并在Java中创建多个zip

0 个答案: