JAVA开发 选择多个文件，系统运行后自动生成ZIP压缩包

选择多个文件，系统运行后自动生成ZIP压缩包

• • 实现方法
  • • 1.1 代码块
    • 1.2 运行结果截取
  • 相关知识

实现方法

案例简述：通过启动java代码来打开文件选择器对话框，用户选择确认需要进行压缩的文件，可一次性选择多个文件，选择完毕后点击按钮确认，指定位置自动生成压缩包。

1.1 代码块

import javax.imageio.stream.FileImageInputStream;
import javax.swing.*;
import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.zip.ZipOutputStream;
import java.util.zip.ZipEntry;

public class FileZipper {

    //生成文件名
    public static String GenerateFileName(String filePath,String suffix){
        String filename;
        Date date = new Date();
        SimpleDateFormat dsf = new SimpleDateFormat("yyyyMMddHHss");
        filename = filePath + dsf.format(date) + " temp" +suffix;
        return filename;
    }


    //选择多个文件，生成压缩包
    public static void FileZipperByMulties() throws FileNotFoundException {
        String filePath = "D:\\JAVAFILE\\attachments\\rars\\";
        JFileChooser fileChooser = new JFileChooser("C:\\Users\\ASUS-PC\\Desktop\\csdn");
        fileChooser.setMultiSelectionEnabled(true);
        fileChooser.setDialogTitle("请选择要压缩的文件（可选择多个）");
        fileChooser.setApproveButtonText("确定");

        int value = fileChooser.showOpenDialog(null);
        if(value != JFileChooser.APPROVE_OPTION){
            return;
        }

        File outZipFile = new File(GenerateFileName(filePath,".zip"));
        File[] files = fileChooser.getSelectedFiles();
        try(ZipOutputStream zipOutputStream = new ZipOutputStream(new FileOutputStream(outZipFile))){
            for(File file:files){
                ZipEntry zipEntry = new ZipEntry(file.getName());
                zipOutputStream.putNextEntry(zipEntry);
                try(FileImageInputStream fileImageInputStream = new FileImageInputStream(file)) {
                    byte[] bytes = new byte[1024];
                    int length;
                    while((length = fileImageInputStream.read(bytes))>0){
                        zipOutputStream.write(bytes,0,length);
                    }
                }
            }
            zipOutputStream.closeEntry();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }


    public static void main(String[] args) {
        try{
            FileZipperByMulties();
            System.out.println("File compressed successfully!");
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        }
    }
}

1.2 运行结果截取

1. 文件选择器对话框选择多个文件
   
2. 控制台输出，表示执行正确
   
3. 压缩包信息
   
   

相关知识

JAVA开发 选择指定的文件生成ZIP压缩包