Google Sheets API : écriture impossible depuis une application Java

**JP666** · 18/05/2018, 10h29

Bonjour,

Je tente en vain depuis plusieurs jours de modifier des cellules d'une Google Sheet depuis une application Java.

J'utilise les trois classes suivantes pour cela (que j'ai trouvé sur Internet).

Code :

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import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.List;
 
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.client.util.store.MemoryDataStoreFactory;
import com.google.api.services.sheets.v4.SheetsScopes;
 
public class GoogleAuthorizeUtil {
 
    public static Credential authorize() throws IOException, GeneralSecurityException {
        InputStream in = GoogleAuthorizeUtil.class.getResourceAsStream("/client_secret.json");
        GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JacksonFactory.getDefaultInstance(), new InputStreamReader(in));
 
        List<String> scopes = Arrays.asList(SheetsScopes.SPREADSHEETS);
 
        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
        		GoogleNetHttpTransport.newTrustedTransport(),
        		JacksonFactory.getDefaultInstance(), clientSecrets, scopes)
        		.setDataStoreFactory(new MemoryDataStoreFactory())
                .setAccessType("offline")
                .build();
        Credential credential = new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
 
        return credential;
    }
 
}

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import java.io.IOException;
import java.security.GeneralSecurityException;
 
import com.google.api.client.auth.oauth2.Credential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.sheets.v4.Sheets;
 
public class SheetsServiceUtil {
 
    private static final String APPLICATION_NAME = "Google Sheets Example";
 
    public static Sheets getSheetsService() throws IOException, GeneralSecurityException {
        Credential credential = GoogleAuthorizeUtil.authorize();
        return new Sheets.Builder(
        		GoogleNetHttpTransport.newTrustedTransport(),
        		JacksonFactory.getDefaultInstance(), credential)
        		.setApplicationName(APPLICATION_NAME)
        		.build();
    }
 
}

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import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Arrays;
 
import org.junit.BeforeClass;
import org.junit.jupiter.api.Test;
 
import com.google.api.services.sheets.v4.Sheets;
import com.google.api.services.sheets.v4.model.UpdateValuesResponse;
import com.google.api.services.sheets.v4.model.ValueRange;
 
public class GoogleSheetsIntegrationTest {
 
    private static Sheets sheetsService;
    private static String SPREADSHEET_ID = "1sILuxZUnyl_7-MlNThjt765oWshN3Xs-PPLfqYe4DhI";
 
    @BeforeClass
    public static void setup() throws GeneralSecurityException, IOException {
        sheetsService = SheetsServiceUtil.getSheetsService();
    }
 
   @Test
    public void whenWriteSheet_thenReadSheetOk() throws IOException {
        ValueRange body = new ValueRange()
        		.setValues(Arrays.asList(
        		        Arrays.asList("Expenses January"),
        		        Arrays.asList("books", "30"),
        		        Arrays.asList("pens", "10"),
        		        Arrays.asList("Expenses February"),
        		        Arrays.asList("clothes", "20"),
        		        Arrays.asList("shoes", "15")));
        UpdateValuesResponse result = sheetsService.spreadsheets().values()
        		.update(SPREADSHEET_ID, "A1", body)
        		.setValueInputOption("RAW")
        		.execute();
        System.out.println(result);
    }
 
}

J'obtiens ce message d'erreur :

Code :

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java.lang.NullPointerException
	at GoogleSheetsIntegrationTest.whenWriteSheet_thenReadSheetOk(GoogleSheetsIntegrationTest.java:34)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:389)
	at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:167)
	at org.junit.jupiter.engine.execution.ThrowableCollector.execute(ThrowableCollector.java:40)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:163)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:110)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:57)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:83)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$2(HierarchicalTestExecutor.java:92)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source)
	at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
	at java.util.Iterator.forEachRemaining(Unknown Source)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
	at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(Unknown Source)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(Unknown Source)
	at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
	at java.util.stream.ReferencePipeline.forEach(Unknown Source)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:92)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$2(HierarchicalTestExecutor.java:92)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source)
	at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
	at java.util.Iterator.forEachRemaining(Unknown Source)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
	at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(Unknown Source)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(Unknown Source)
	at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
	at java.util.stream.ReferencePipeline.forEach(Unknown Source)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:92)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:51)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:43)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:170)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:154)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:86)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)

Pourriez-vous me dire ce qui ne va pas, s'il vous plaît ? Merci.

Bonne journée.

**bouye** · 23/05/2018, 04h26

Le soucis ne vient pas de l'API mais de ton test, le code suivant n'est jamais exécuté et donc sheetService est null ce qui provoque l'exception dans le test suivant.

Code :

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 @BeforeClass
    public static void setup() throws GeneralSecurityException, IOException {
        sheetsService = SheetsServiceUtil.getSheetsService();
    }

L’annotation @BeforeClass provient de JUnit 4 mais tu sembles utiliser JUnit 5 donc a remplacer par :

Code :

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 @BeforeAll
    public static void setup() throws GeneralSecurityException, IOException {
        sheetsService = SheetsServiceUtil.getSheetsService();
    }

**JP666** · 23/05/2018, 11h50

Bonjour et merci pour votre réponse.

J'ai procédé à la rectification et j'obtiens ce message :

Code :

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java.lang.NullPointerException
	at java.io.Reader.<init>(Unknown Source)
	at java.io.InputStreamReader.<init>(Unknown Source)
	at com.gofret.sheets.GoogleAuthorizeUtil.authorize(GoogleAuthorizeUtil.java:24)
	at com.gofret.sheets.SheetsServiceUtil.getSheetsService(SheetsServiceUtil.java:16)
	at com.gofret.sheets.GoogleSheetsIntegrationTest.setup(GoogleSheetsIntegrationTest.java:21)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:389)
	at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:115)
	at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.lambda$invokeBeforeAllMethods$5(ClassTestDescriptor.java:228)
	at org.junit.jupiter.engine.execution.ThrowableCollector.execute(ThrowableCollector.java:40)
	at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.invokeBeforeAllMethods(ClassTestDescriptor.java:227)
	at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.before(ClassTestDescriptor.java:151)
	at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.before(ClassTestDescriptor.java:61)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:80)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$null$2(HierarchicalTestExecutor.java:92)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source)
	at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
	at java.util.Iterator.forEachRemaining(Unknown Source)
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
	at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(Unknown Source)
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(Unknown Source)
	at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
	at java.util.stream.ReferencePipeline.forEach(Unknown Source)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.lambda$execute$3(HierarchicalTestExecutor.java:92)
	at org.junit.platform.engine.support.hierarchical.SingleTestExecutor.executeSafely(SingleTestExecutor.java:66)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:77)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:51)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:43)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:170)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:154)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:90)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:86)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:538)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:760)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:460)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:206)

J'ai l'impression que le fichier JSON contenant les identifiants n'est pas lu et que la connexion n'est donc pas possible... Le fichier est présentement à l'adresse c:/workspace/Projet/src/main/resources

Auriez-vous une idée, s'il vous plaît ? Merci.

**bouye** · 24/05/2018, 05h47

Cela dépend ou tu l'as mis par rapport a ta classe/ton package/ton IDE. Avec "/client_secret.json" il faut qu'il soit a la racine du CLASSPATH. Mais effectivement, s'il n'est pas trouvé cela devrait engendrer une erreur de ce genre.
Pour moi j'ai pu passer cette étape et après j'avais le navigateur qui s'ouvrait pour demander la permission d'utiliser l'application sur mon compte.

**JP666** · 24/05/2018, 12h39

Même si je mets le chemin d'accès complet (c:/Projet/src/main/resources/client_secret.json), j'ai la même erreur en retour...

Google Sheets API : écriture impossible depuis une application Java

API standards et tierces Java

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