如何在Java中处理Zip文件的格式转换

在Java中处理ZIP文件格式的转换，可以使用Java内置的java.util.zip包

1. 读取ZIP文件：

import java.io.FileInputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class ReadZIPFile {
    public static void main(String[] args) {
        String zipFilePath = "path/to/your/zipfile.zip";

        try (FileInputStream fis = new FileInputStream(zipFilePath);
             ZipInputStream zis = new ZipInputStream(fis)) {

            ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                System.out.println("Entry: " + entry.getName());
                // 读取文件内容，如果需要的话
                // byte[] buffer = new byte[entry.getSize()];
                // zis.read(buffer);
                zis.closeEntry();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2. 将多个文件添加到ZIP文件中：

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class CreateZIPFile {
    public static void main(String[] args) {
        String zipFilePath = "path/to/your/outputfile.zip";
        File[] filesToAdd = new File[]{
                new File("path/to/your/file1.txt"),
                new File("path/to/your/file2.txt")
        };

        try (FileOutputStream fos = new FileOutputStream(zipFilePath);
             ZipOutputStream zos = new ZipOutputStream(fos)) {

            for (File file : filesToAdd) {
                ZipEntry entry = new ZipEntry(file.getName());
                zos.putNextEntry(entry);

                byte[] buffer = new byte[1024];
                int bytesRead;
                while ((bytesRead = file.read(buffer)) != -1) {
                    zos.write(buffer, 0, bytesRead);
                }

                zos.closeEntry();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

3. 从ZIP文件中提取文件：

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class ExtractZIPFile {
    public static void main(String[] args) {
        String zipFilePath = "path/to/your/zipfile.zip";
        String outputFolderPath = "path/to/your/outputfolder";

        File outputFolder = new File(outputFolderPath);
        if (!outputFolder.exists()) {
            outputFolder.mkdirs();
        }

        try (FileInputStream fis = new FileInputStream(zipFilePath);
             ZipInputStream zis = new ZipInputStream(fis)) {

            ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                File outputFile = new File(outputFolderPath, entry.getName());
                if (!outputFile.getParentFile().exists()) {
                    outputFile.getParentFile().mkdirs();
                }

                if (entry.isDirectory()) {
                    outputFile.mkdirs();
                } else {
                    try (FileOutputStream fos = new FileOutputStream(outputFile)) {
                        byte[] buffer = new byte[1024];
                        int bytesRead;
                        while ((bytesRead = zis.read(buffer)) != -1) {
                            fos.write(buffer, 0, bytesRead);
                        }
                    }
                }

                zis.closeEntry();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

这些示例展示了如何在Java中读取、创建和提取ZIP文件。你可以根据需要修改这些示例以满足你的具体需求。