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java - Java Spring Boot 中的 Firebase 上传

转载 作者:行者123 更新时间:2023-12-03 21:04:32 24 4
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我正在尝试将文件上传到 Java Spring Boot 中的 Firebase 存储。我查看了 Stack Overflow 和其他在线内容,但尚未找到可行的解决方案。请帮助并提前致谢!

到目前为止,我有以下代码,它基于 this question 的代码:

// Input Firebase credentials:
FileInputStream serviceAccount = new FileInputStream("{{path to the keys}}");
FirebaseOptions options = new FirebaseOptions.Builder()
.setCredentials(GoogleCredentials.fromStream(serviceAccount))
.setDatabaseUrl("{{url}}")
.build();
FirebaseApp.initializeApp(options);

// Other Firebase variables:
FirebaseApp storage = FirebaseApp.getInstance();

// Upload to Firebase:
BlobId blobId = BlobId.of("bucket", "blob_name");
BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
Blob blob = storage.create(blobInfo, "Hello, Cloud Storage!".getBytes(UTF_8));

但是,我无法运行它,因为出现以下错误:

UTF_8 cannot be resolved to a variable

如果我删除 UTF_8 部分,我会收到以下错误:

The method create(BlobInfo, byte[]) is undefined for the type Object

最佳答案

你可以试试这个:

  1. 创建一个类以在您的 API 中将其公开为网络服务:
import com.yourcompany.yourproject.services.FirebaseFileService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@RestController
public class ResourceController {
@Autowired
private FirebaseFileService firebaseFileService;

@PostMapping("/api/v1/test")
public ResponseEntity create(@RequestParam(name = "file") MultipartFile file) {
try {
String fileName = firebaseFileService.saveTest(file);
// do whatever you want with that
} catch (Exception e) {
// throw internal error;
}
return ResponseEntity.ok().build();
}
}
  1. 创建服务以将图像上传到 Firebase 存储。
import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.storage.Blob;
import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.BlobInfo;
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.firebase.cloud.StorageClient;
import lombok.Data;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.event.ApplicationReadyEvent;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.EventListener;
import org.springframework.core.io.ClassPathResource;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.UUID;
import com.google.cloud.storage.StorageOptions;
import java.util.HashMap;
import java.util.Map;

@Service
public class FirebaseFileService {

private Storage storage;

@EventListener
public void init(ApplicationReadyEvent event) {
try {
ClassPathResource serviceAccount = new ClassPathResource("firebase.json");
storage = StorageOptions.newBuilder().
setCredentials(GoogleCredentials.fromStream(serviceAccount.getInputStream())).
setProjectId("YOUR_PROJECT_ID").build().getService();
} catch (Exception ex) {
ex.printStackTrace();
}
}

public String saveTest(MultipartFile file) throws IOException{
String imageName = generateFileName(file.getOriginalFilename());
Map<String, String> map = new HashMap<>();
map.put("firebaseStorageDownloadTokens", imageName);
BlobId blobId = BlobId.of("YOUR_BUCKET_NAME", imageName);
BlobInfo blobInfo = BlobInfo.newBuilder(blobId)
.setMetadata(map)
.setContentType(file.getContentType())
.build();
storage.create(blobInfo, file.getInputStream());
return imageName;
}

private String generateFileName(String originalFileName) {
return UUID.randomUUID().toString() + "." + getExtension(originalFileName);
}

private String getExtension(String originalFileName) {
return StringUtils.getFilenameExtension(originalFileName);
}
}

请注意,您需要下载 Firebase 配置文件并将其作为“firebase.json”存储在 src/main/resources 文件夹下。 https://support.google.com/firebase/answer/7015592?hl=en

还需要添加 Maven 依赖:

<dependency>
<groupId>com.google.firebase</groupId>
<artifactId>firebase-admin</artifactId>
<version>6.14.0</version>
</dependency>

关于java - Java Spring Boot 中的 Firebase 上传,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55231615/

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