SpringBoot实现文件批量打包下载_springboot文件打包下载

实现将指定的多个文件打包成一个压缩文件下载。

1. 引入pom依赖

<dependencies>
    <!-- Spring Web -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- Apache Commons IO -->
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
    </dependency>
    <!-- Apache Commons Compress -->
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-compress</artifactId>
    </dependency>
</dependencies>

2. 编写控制器

import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
 
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.List;
 
@RestController
public class FileDownloadController {
 
    @GetMapping("/download")
    public ResponseEntity<byte[]> downloadFiles(@RequestParam List<String> fileNames) throws IOException {
        // 创建临时压缩文件
        File zipFile = File.createTempFile("download", ".zip");
        try (FileOutputStream fos = new FileOutputStream(zipFile);
             ZipArchiveOutputStream zos = new ZipArchiveOutputStream(fos)) {
 
            for (String fileName : fileNames) {
                File fileToZip = new File(fileName);
                FileInputStream fis = new FileInputStream(fileToZip);
                ArchiveEntry entry = new ZipArchiveEntry(fileToZip.getName());
                zos.putArchiveEntry(entry);
                byte[] buffer = new byte[1024];
                int len;
                while ((len = fis.read(buffer)) > 0) {
                    zos.write(buffer, 0, len);
                }
                fis.close();
                zos.closeArchiveEntry();
            }
 
            zos.finish();
        }
 
        // 设置HTTP响应头
        HttpHeaders headers = new HttpHeaders();
        headers.add("Content-Disposition", "attachment; filename=download.zip");
 
        // 读取压缩文件内容并返回给客户端
        byte[] fileData = org.apache.commons.io.FileUtils.readFileToByteArray(zipFile);
 
        return ResponseEntity
                .status(HttpStatus.OK)
                .headers(headers)
                .body(fileData);
    }
}

3. 发送GET请求

http://localhost:8080/download?fileNames=/path/to/file1.txt&fileNames=/path/to/file2.txt