为设置API_Key

Question

我正在努力学习Google如何与Java一起工作，但我很难找到如何输入API的授权密钥。API键指令要求使用key=API_KEY参数传递它，但我不确定输入的位置。这是添加到主类中还是在另一个子类中输入的？

我使用运行在Windows 10上的Eclipse作为我的平台。我的基本配置来自https://cloud.google.com/translate/docs/quickstart-client-libraries#client-libraries-install-java。按照这些步骤，我已经在Google注册并创建了API-Key，将.JSON文件下载到我的笔记本上，并安装了Google，并遵循了在这个campaign=ToolsforEclipse上配置的说明。

我用来测试的代码是在https://cloud.google.com/translate/docs/quickstart-client-libraries#client-libraries-install-java的Quickstart中找到的示例Java代码。

// Imports the Google Cloud client library
import com.google.cloud.translate.Translate;
import com.google.cloud.translate.Translate.TranslateOption;
import com.google.cloud.translate.TranslateOptions;
import com.google.cloud.translate.Translation;

public class QuickstartSample {
  public static void main(String... args) throws Exception {
  // Instantiates a client
  Translate translate = TranslateOptions.getDefaultInstance().getService();

  // The text to translate
  String text = "Hello, world!";

  // Translates some text into Russian
  Translation translation =
    translate.translate(
        text,
        TranslateOption.sourceLanguage("en"),
        TranslateOption.targetLanguage("ru"));


System.out.printf("Text: %s%n", text);
System.out.printf("Translation: %s%n", translation.getTranslatedText());
  }
}

我已经尝试修改我的变量来指向路径变量GOOGLE_APPLICATION_CREDENTIALS=c:_project\translation.json，但这似乎没有什么区别。

这是Eclipse在尝试运行程序时返回的错误消息，

Aug. 25, 2019 10:08:29 P.M.  
com.google.auth.oauth2.ComputeEngineCredentials runningOnComputeEngine 
INFO: Failed to detect whether we are running on Google Compute Engine. 
Exception in thread "main" com.google.cloud.translate.TranslateException: The request is missing a valid API key.   
     at com.google.cloud.translate.spi.v2.HttpTranslateRpc.translate(HttpTranslateRpc.java:62)  
     at com.google.cloud.translate.spi.v2.HttpTranslateRpc.translate(HttpTranslateRpc.java:156)     
     at com.google.cloud.translate.TranslateImpl$4.call(TranslateImpl.java:124)     
     at com.google.cloud.translate.TranslateImpl$4.call(TranslateImpl.java:121)     
     at com.google.api.gax.retrying.DirectRetryingExecutor.submit(DirectRetryingExecutor.java:105)  
     at com.google.cloud.RetryHelper.run(RetryHelper.java:76)   
     at com.google.cloud.RetryHelper.runWithRetries(RetryHelper.java:50)    
     at com.google.cloud.translate.TranslateImpl.translate(TranslateImpl.java:120)  
     at com.google.cloud.translate.TranslateImpl.translate(TranslateImpl.java:138)  
     at com.example.translate.QuickstartSample.main(QuickstartSample.java:35) 
Caused by: com.google.api.client.googleapis.json.GoogleJsonResponseException: 403 Forbidden 
{   
"code" : 403,   
"errors" : [ {
"domain" : "global",
"message" : "The request is missing a valid API key.",
"reason" : "forbidden"   
} ],   
"message" : "The request is missing a valid API key.",   
"status" : "PERMISSION_DENIED" }    

Answer 1

阅读文档--这是为谷歌云翻译添加api_key的方法。我对它进行了测试，它在两种情况下都有效。

“注意，这段代码也可以与API键一起使用。默认情况下，API键在GOOGLE_API_KEY环境变量中查找。一旦设置API密钥，就可以通过调用通过创建的翻译服务上的方法来调用API。

您还可以显式地设置API密钥，如下所示：

Translate translate = TranslateOptions.newBuilder().setApiKey("myKey").build().getService();

https://cloud.google.com/docs/authentication/production

https://github.com/googleapis/java-translate