Java 无法访问 com.google.auth.Credentials答案

【问题标题】：Java Cannot access com.google.auth.CredentialsJava 无法访问 com.google.auth.Credentials
【发布时间】：2022-01-16 08:11:49
【问题描述】：

我正在使用 Firebase 为客户端开发一个简单的 JavaFx 应用程序。

这个应用程序在没有 JavaFx 的情况下可以完美运行，但是我必须重新创建这个项目才能让 JavaFx 使用它（简单地添加依赖项不起作用）。

我知道这个问题可能是重复的，但我已经尝试了几乎所有之前建议的方法。（链接了我在下面尝试过的）

使用 GoogleCredentials 时，应用程序会抛出此错误：

java: cannot access com.google.auth.Credentials
  class file for com.google.auth.Credentials not found

这是具有方法的类：（参见私有构造函数）

public class DataManage {
    private FirebaseOptions options;
    private Firestore firestore;
    private FirebaseAuth mAuth;

    public static DataManage getInstance() {
        return Holder.INSTANCE;
    }

    public void initApp() {
        FirebaseApp.initializeApp(options);
    }

    public UserRecord getUserInfo(String email) {
        try {
            return mAuth.getUserByEmail(email);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public void getUserDataFromDate(String email, Date date) {
        try {
            //Todo add stuff later
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /// I call the GoogleCredentials.fromStream() method here
    private DataManage() {
        try {
            FileInputStream inputStream = new FileInputStream("service-account.json");

            options = FirebaseOptions.builder()
                    .setCredentials(GoogleCredentials.fromStream(inputStream))
                    .setDatabaseUrl("https://attendance-349db.firebaseio.com/")
                    .build();

            FirebaseApp.initializeApp(options);

            firestore = FirestoreClient.getFirestore();
            mAuth = FirebaseAuth.getInstance();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static class Holder {
        private static final DataManage INSTANCE = new DataManage();
    }
}

这是我的 maven 依赖文件：（只包括依赖和部分构建以避免混乱）

依赖关系：

<dependencies>
        <dependency>
            <groupId>com.google.firebase</groupId>
            <artifactId>firebase-admin</artifactId>
            <version>8.1.0</version>
            <exclusions>
                <exclusion>
                    <groupId>com.google.oauth-client</groupId>
                    <artifactId>google-oauth-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-controls</artifactId>
            <version>17-ea+11</version>
        </dependency>
        <dependency>
            <groupId>org.openjfx</groupId>
            <artifactId>javafx-fxml</artifactId>
            <version>17-ea+11</version>
        </dependency>

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

构建：

<build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>17</source>
                    <target>17</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.openjfx</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>0.0.6</version>
                <executions>
                    <execution>
                        <!-- Default configuration for running with: mvn clean javafx:run -->
                        <id>default-cli</id>
                        <configuration>
                            <mainClass>com.indo.attendanceserver/com.indo.attendanceserver.Main</mainClass>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

我的模块：

module com.indo.attendanceserver {
    requires javafx.controls;
    requires javafx.fxml;
    requires firebase.admin;
    requires google.cloud.firestore;
    requires com.google.auth.oauth2;


    opens com.indo.attendanceserver to javafx.fxml;
    exports com.indo.attendanceserver;
    exports com.indo.attendanceserver.scenes.intro;
    opens com.indo.attendanceserver.scenes.intro to javafx.fxml;
    exports com.indo.attendanceserver.scenes.user;
    opens com.indo.attendanceserver.scenes.user to javafx.fxml;
}

以下是我尝试过但无效的建议的链接：

No app-engine files in my project.

Excluding didn't help, tried without excluding too

Latest version for both

No updates from this person

非常感谢任何帮助。

【问题讨论】：

标签： java firebase maven javafx

【解决方案1】：

我已经设法解决了这个问题。

我所要做的就是添加

requires com.google.auth;

到我的module-info.java 文件。

最终文件如下所示：

module com.indo.attendanceserver {
    requires javafx.controls;
    requires javafx.fxml;
    requires firebase.admin;
    requires google.cloud.firestore;
    requires com.google.auth.oauth2;
    requires com.google.auth;



    opens com.indo.attendanceserver to javafx.fxml;
    exports com.indo.attendanceserver;
    exports com.indo.attendanceserver.scenes.intro;
    opens com.indo.attendanceserver.scenes.intro to javafx.fxml;
    exports com.indo.attendanceserver.scenes.user;
    opens com.indo.attendanceserver.scenes.user to javafx.fxml;
}

我希望这对正在寻找答案的人有所帮助。

【讨论】：