blocks|key|2341162|text|如果Java项目运行在受信任的环境中(例如他们的开发机器、您控制的服务器或Cloud+Functions)，他们可以使用Firebase+Admin+SDK来访问云存储。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2341163|有关如何入门的信息，请参阅Firebase+Admin+SDK+documentation，然后参阅Google+Cloud+Storage+documentation+for+Java+clients了解更多信息。具体来看一下sample+of+uploading+a+file+in+Java|offset|length|2341164|BlobInfo.newBuilder(blobId).setContentType("text/plain").build()；Blob+BlobId+=BlobId.of(“|2341165|”，"blob_name")；BlobInfo+blobInfo+=bucket+blob+=+storage.create(blobInfo，“您好，云硬盘！”.getBytes(UTF_8))；|blockquote|2341166|2341167|entityMap|0|LINK|mutability|MUTABLE|url|https://firebase.google.com/docs/storage/admin/start|1|http://googleapis.github.io/google-cloud-java/google-cloud-clients/apidocs/com/google/cloud/storage/Bucket.html|2|https://cloud.google.com/storage/docs/uploading-objects#storage-upload-object-java^0|0|D|W|0|1E|1F|1|36|Y|2|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Y|8|@]|9|@$D|Z|E|10|1|11]|$D|12|E|13|1|14]|$D|15|E|16|1|17]]|A|$]]|$1|F|3|G|5|6|7|18|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|19|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]|T|$5|O|P|Q|A|$R|U]]|V|$5|O|P|Q|A|$R|W]]]]

If the Java project is running in a trusted environment (such as their development machine, a server you control, or Cloud Functions), they can use the Firebase Admin SDK to access Cloud Storage.

See the <a href="https://firebase.google.com/docs/storage/admin/start" rel="nofollow noreferrer">Firebase Admin SDK documentation</a> on how to get started, and then the <a href="http://googleapis.github.io/google-cloud-java/google-cloud-clients/apidocs/com/google/cloud/storage/Bucket.html" rel="nofollow noreferrer">Google Cloud Storage documentation for Java clients</a> for more. Specifically have a look at the <a href="https://cloud.google.com/storage/docs/uploading-objects#storage-upload-object-java" rel="nofollow noreferrer">sample of uploading a file in Java</a>:

<blockquote>
<pre><code>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));
</code></pre>
</blockquote>

blocks|key|5564956|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5564957|FirebaseOptions+options+=+FirebaseOptions.builder()
++++++++++++++++++++.setCredentials(credential)
++++++++++++++++++++.setDatabaseUrl(projectUrl)
++++++++++++++++++++.setStorageBucket("YOUR+BUCKET+LINK")
++++++++++++++++++++.build();

++++FirebaseApp+fireApp+=+FirebaseApp.initializeApp(options);

++++StorageClient+storageClient+=+StorageClient.getInstance(fireApp);
++++++++++++InputStream+testFile+=+new+FileInputStream("YOUR+FILE+PATH");
++++++++++++String+blobString+=+"NEW_FOLDER/"+%2B+"FILE_NAME.EXT";++++++++

++++storageClient.bucket().create(blobString,+testFile+,+Bucket.BlobWriteOption.userProject("YOUR+PROJECT+ID"));|code-block|syntax|javascript|5564958|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this:

<pre><code>FirebaseOptions options = FirebaseOptions.builder()
 .setCredentials(credential)
 .setDatabaseUrl(projectUrl)
 .setStorageBucket("YOUR BUCKET LINK")
 .build();

 FirebaseApp fireApp = FirebaseApp.initializeApp(options);

 StorageClient storageClient = StorageClient.getInstance(fireApp);
 InputStream testFile = new FileInputStream("YOUR FILE PATH");
 String blobString = "NEW_FOLDER/" + "FILE_NAME.EXT"; 

 storageClient.bucket().create(blobString, testFile , Bucket.BlobWriteOption.userProject("YOUR PROJECT ID"));
</code></pre>

blocks|key|3453076|text|String+blobString+=+DIR+%2B+fileIdWithExtension;
Blob+blob+=+storageClient.bucket().create(blobString,+file.getInputStream(),+Bucket.BlobWriteOption.userProject(PROJECT_ID));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3453077|但请记住，您应该初始化firebase。例如|unstyled|3453078|+++private+FirebaseApp+initFirebase()+{
++++++++FileInputStream+serviceAccount;
++++++++try+{
++++++++++++serviceAccount+=+new+FileInputStream(fileUploadPath);
++++++++}+catch+(FileNotFoundException+e)+{
++++++++++++throw+new+FileStorageException(ErrorMessage.FILE_NOT_FOUND+%2B+"firebaseConfig.json");
++++++++}
++++++++FirebaseOptions+options;
++++++++try+{
++++++++++++options+=+new+FirebaseOptions.Builder()
++++++++++++++++++++.setCredentials(GoogleCredentials.fromStream(serviceAccount))
++++++++++++++++++++.setStorageBucket(BUCKET_NAME)
++++++++++++++++++++.build();
++++++++}+catch+(IOException+e)+{
++++++++++++e.printStackTrace();
++++++++++++throw+new+FailedToSetCredentialsException(ErrorMessage.COULD_NOT_SET_CREDENTIALS);
++++++++}

++++++++return+FirebaseApp.initializeApp(options);
++++}|3453079|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>String blobString = DIR + fileIdWithExtension;
Blob blob = storageClient.bucket().create(blobString, file.getInputStream(), Bucket.BlobWriteOption.userProject(PROJECT_ID));
</code></pre>
But keep in mind that you should initialize firebase. For example
<pre><code> private FirebaseApp initFirebase() {
 FileInputStream serviceAccount;
 try {
 serviceAccount = new FileInputStream(fileUploadPath);
 } catch (FileNotFoundException e) {
 throw new FileStorageException(ErrorMessage.FILE_NOT_FOUND + &quot;firebaseConfig.json&quot;);
 }
 FirebaseOptions options;
 try {
 options = new FirebaseOptions.Builder()
 .setCredentials(GoogleCredentials.fromStream(serviceAccount))
 .setStorageBucket(BUCKET_NAME)
 .build();
 } catch (IOException e) {
 e.printStackTrace();
 throw new FailedToSetCredentialsException(ErrorMessage.COULD_NOT_SET_CREDENTIALS);
 }

 return FirebaseApp.initializeApp(options);
 }

</code></pre>

blocks|key|3453185|text|如果你使用的是Spring+Boot，你可以尝试这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3453186|3453187|在您的API中创建一个类以将其公开为web服务：|ordered-list-item|3453188|3453189|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();
++++}
}|code-block|syntax|javascript|3453190|3453191|创建将映像上载到firebase存储的服务。|3453192|3453193|@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()+%2B+"."+%2B+getExtension(originalFileName);
++++}

++++private+String+getExtension(String+originalFileName)+{
++++++++return+StringUtils.getFilenameExtension(originalFileName);
++++}
}|3453194|注意:您需要下载Firebase配置文件，并将其存储为src/main/resources文件夹下的"firebase.json“。https://support.google.com/firebase/answer/7015592?hl=en|offset|length|3453195|此外，您还需要添加Maven依赖：|3453196|<dependency>
++++<groupId>com.google.firebase</groupId>
++++<artifactId>firebase-admin</artifactId>
++++<version>6.14.0</version>
</dependency>|3453197|entityMap|0|LINK|mutability|MUTABLE|url|https://support.google.com/firebase/answer/7015592?hl=en^0|0|0|0|0|0|0|0|0|0|1U|1K|0|0|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|18|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|19|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|1B|8|@]|9|@]|A|$J|K]]|$1|L|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|M|3|N|5|E|7|1D|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1E|8|@]|9|@]|A|$]]|$1|P|3|Q|5|I|7|1F|8|@]|9|@]|A|$J|K]]|$1|R|3|S|5|6|7|1G|8|@]|9|@$T|1H|U|1I|1|1J]]|A|$]]|$1|V|3|W|5|6|7|1K|8|@]|9|@]|A|$]]|$1|X|3|Y|5|I|7|1L|8|@]|9|@]|A|$J|K]]|$1|Z|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|10|$11|$5|12|13|14|A|$15|16]]]]

If you are using Spring Boot, you can try this:
<ol>
<li>Create a class to expose it as a web service in your API:</li>
</ol>
<pre><code>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(&quot;/api/v1/test&quot;)
 public ResponseEntity create(@RequestParam(name = &quot;file&quot;) MultipartFile file) {
 try {
 String fileName = firebaseFileService.saveTest(file);
 // do whatever you want with that
 } catch (Exception e) {
 // throw internal error;
 }
 return ResponseEntity.ok().build();
 }
}
</code></pre>
<ol start="2">
<li>Create a service to upload the image to firebase storage.</li>
</ol>
<pre><code>@Service
public class FirebaseFileService {

 private Storage storage;

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

 public String saveTest(MultipartFile file) throws IOException{
 String imageName = generateFileName(file.getOriginalFilename());
 Map&lt;String, String&gt; map = new HashMap&lt;&gt;();
 map.put(&quot;firebaseStorageDownloadTokens&quot;, imageName);
 BlobId blobId = BlobId.of(&quot;YOUR_BUCKET_NAME&quot;, 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() + &quot;.&quot; + getExtension(originalFileName);
 }

 private String getExtension(String originalFileName) {
 return StringUtils.getFilenameExtension(originalFileName);
 }
}
</code></pre>
Note you need to download Firebase config file and store it as &quot;firebase.json&quot; under the src/main/resources folder.
<a href="https://support.google.com/firebase/answer/7015592?hl=en" rel="nofollow noreferrer">https://support.google.com/firebase/answer/7015592?hl=en</a>
Also you need to add the Maven dependency:
<pre><code>&lt;dependency&gt;
 &lt;groupId&gt;com.google.firebase&lt;/groupId&gt;
 &lt;artifactId&gt;firebase-admin&lt;/artifactId&gt;
 &lt;version&gt;6.14.0&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>

I am working in a functionality where i need to upload an Image/File to firebase storage using java and expose it as an API. I have already achieved this functionality in angular 4 typescript. But now i need this method as an Java Rest API, so that my peer can also consume the same method instead of writing a new one. So is there any API or methods to write the image to firebase storage ?

How To upload Images/Files to Firebase storage in Java?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我在一个功能中工作，我需要使用java将图像/文件上传到firebase存储，并将其公开为API。我已经在angular 4 typescript中实现了这个功能。但是现在我需要这个方法作为Java Rest API，这样我的同级也可以使用相同的方法，而不是编写新的方法。那么，是否有任何API或方法可以将映像写入到fi...

问如何在Java中将图像/文件上传到Firebase存储？
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问如何在Java中将图像/文件上传到Firebase存储？EN