如何使用 Java Spring 引导 zip4j return 加密的 zip 文件

Question

我想生成一个受密码保护的 zip 文件，然后 return 到前端。我正在使用 spring 引导和 zip4j 库。可以在后端服务中生成zip文件，但不能发送到前端。

服务

import net.lingala.zip4j.ZipFile;
import net.lingala.zip4j.model.ZipParameters;
import net.lingala.zip4j.model.enums.CompressionLevel;
import net.lingala.zip4j.model.enums.EncryptionMethod;

public ZipFile downloadZipFileWithPassword(String password){
    
    String filePath="Sample.csv";
    
    ZipParameters zipParameters = new ZipParameters();
    zipParameters.setEncryptFiles(true);
    zipParameters.setCompressionLevel(CompressionLevel.HIGHER);
    zipParameters.setEncryptionMethod(EncryptionMethod.AES);
    ZipFile zipFile = new ZipFile("Test.zip", password.toCharArray());
    zipFile.addFile(new File(filePath), zipParameters);
    
    return zipFile;
}

控制器

import net.lingala.zip4j.ZipFile;

@GetMapping(value = "/v1/downloadZipFileWithPassword")
ResponseEntity<ZipFile> downloadZipFileWithPassword(@RequestParam("password")String password){
    
        ZipFile zipFile = service.downloadZipFileWithPassword(password);
        return ResponseEntity.ok().contentType(MediaType.parseMediaType("application/zip"))
                .header("Content-Disposition", "attachment; filename=\"Test.zip\"")
                .body(zipFile);
    
}

在控制器中如何将此 ZipFile (net.lingala.zip4j.ZipFile) 转换为输出流并将其发送给客户端？

Answer 1

下面的代码对我有用。

import net.lingala.zip4j.ZipFile;

@GetMapping(value = "/v1/downloadZipFileWithPassword")
ResponseEntity<StreamingResponseBody> downloadZipFileWithPassword(@RequestParam("password") String password) {

    ZipFile zipFile = service.downloadZipFileWithPassword(password);
    return ResponseEntity.ok().contentType(MediaType.parseMediaType("application/zip"))
        .header("Content-Disposition", "attachment; filename=\"Test.zip\"")
        .body(outputStream -> {

            try (OutputStream os = outputStream; InputStream inputStream = new FileInputStream(zipFile.getFile())) {
                IOUtils.copy(inputStream, os);
            }
        });

}

如何使用 Java Spring 引导 zip4j return 加密的 zip 文件

How to return an encrypted zip file using Java Spring boot zip4j

java

spring-boot

rest

zip4j