java.lang.NoSuchMethodError：com.google.common.collect.Iterables.getFirst（Ljava / lang / Iterable; Ljava / lang / Object;）Ljava / lang / Object; 在com.google.auth.oauth2.OAuth2Credentials.getFromServiceLoader（OAuth2Credentials.java:334） ...
Java测试用例：
public void connectToFirebase() throws IOException {
System.out.println("connectToFirebase()");
FileInputStream serviceAccount;
serviceAccount = new FileInputStream
("C:\\...\\social-networking-site-ae94d-firebase-adminsdk-xxxxx-xxxxxxxxxx.json");
Map<String, Object> auth = new HashMap<String, Object>();
auth.put("uid", "my-service-worker");
System.out.println("-1-"); // error occurred after this line
FirebaseOptions options = new FirebaseOptions.Builder()
.setCredentials(GoogleCredentials.fromStream(serviceAccount))
.setDatabaseUrl("https://social-networking-site-ae94d.firebaseio.com")
.setDatabaseAuthVariableOverride(auth)
.build();
FirebaseApp.initializeApp(options);
System.out.println("-2-");
DatabaseReference ref = FirebaseDatabase.getInstance()
.getReference("/some_resource");
ref.addListenerForSingleValueEvent(new ValueEventListener() {
public void onDataChange(DataSnapshot dataSnapshot) {
String res = (String) dataSnapshot.getValue();
System.out.println(res);
}
public void onCancelled(DatabaseError error) {
}
});
}
pom.xml：
<dependency>
<groupId>com.google.firebase</groupId>
<artifactId>firebase-admin</artifactId>
<version>6.5.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-simple -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.6.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.common/google-collect -->
<dependency>
<groupId>com.google.common</groupId>
<artifactId>google-collect</artifactId>
<version>0.5</version>
</dependency>
...
