玩Java-無法連接做數據庫PostgreSQL

Question

我使用激活器創建了新的play-java應用程序。 現在，我需要將其連接到postgreSQL數據庫。 無論我嘗試什么，我總是會遇到此錯誤：

Error in custom provider, Configuration error: Configuration error[Cannot connect to database [default]]

這是我的具有最新依賴項的build.sbt：

libraryDependencies += "postgresql" % "postgresql" % "9.1-901-1.jdbc4"
libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.38"

這是application.conf：

db.default.driver=org.postgresql.Driver
db.default.url="jdbc:postgresql://localhost/table4you"
db.default.user="postgres"
db.default.password="test"

我什至嘗試了這個：

db.default.driver=org.postgresql.Driver
db.default.url="jdbc:postgresql://postgres:test@localhost:6789/table4you"

這也不起作用。 之后，我嘗試檢查mySQL是否可以運行，並在build.sbt中添加了mysql依賴項，並將驅動程序和URL更改為：

#db.default.driver=com.mysql.jdbc.Driver
#db.default.url="jdbc:mysql://localhost/table4you"
#db.default.user="root"
#db.default.password=""

而且有效！ 但是我真的必須使其與postgres一起使用。 現在，我假設問題出在數據庫本身，而不是在application.conf文件中。 啟動數據庫的方式是，打開pgAdmin III，並在其中連接到服務器和table4you數據庫（通過雙擊它們）。 我是否應該使用其他方式啟動postgresql數據庫？ 我怎樣做才能使其與postgresql一起使用？

編輯：我嘗試了此操作，但是再次遇到相同的錯誤：我在heroku上創建了一個數據庫，並且使用到那里的連接設置（主機名，用戶名，密碼和數據庫名）來使用在線數據庫，而不是本地主機。 遺憾的是輸出與以前的:(。

這是錯誤的堆棧跟蹤：

Unexpected exception
CreationException: Unable to create injector, see the following errors:

1) Error in custom provider, Configuration error: Configuration error[Cannot connect to database [default]]
  while locating play.api.db.DBApiProvider
  while locating play.api.db.DBApi
    for parameter 0 at play.db.DefaultDBApi.<init>(DefaultDBApi.java:28)
  at play.db.DefaultDBApi.class(DefaultDBApi.java:28)
  while locating play.db.DefaultDBApi
  while locating play.db.DBApi
    for field at play.db.DBModule$NamedDatabaseProvider.dbApi(DBModule.java:61)
  while locating play.db.DBModule$NamedDatabaseProvider
  at com.google.inject.util.Providers$GuicifiedProviderWithDependencies.initialize(Providers.java:149)
  at play.db.DBModule.bindings(DBModule.java:40):
Binding(interface play.db.Database qualified with QualifierInstance(@play.db.NamedDatabase(value=default)) to ProviderTarget(play.db.DBModule$NamedDatabaseProvider@70606a)) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1)
Caused by: Configuration error: Configuration error[Cannot connect to database [default]]
    at play.api.Configuration$.configError(Configuration.scala:178)
    at play.api.Configuration.reportError(Configuration.scala:829)
    at play.api.db.DefaultDBApi$$anonfun$connect$1.apply(DefaultDBApi.scala:48)
    at play.api.db.DefaultDBApi$$anonfun$connect$1.apply(DefaultDBApi.scala:42)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at play.api.db.DefaultDBApi.connect(DefaultDBApi.scala:42)
    at play.api.db.DBApiProvider.get$lzycompute(DBModule.scala:72)
    at play.api.db.DBApiProvider.get(DBModule.scala:62)
    at play.api.db.DBApiProvider.get(DBModule.scala:58)
    at com.google.inject.internal.ProviderInternalFactory.provision(ProviderInternalFactory.java:81)
    at com.google.inject.internal.BoundProviderFactory.provision(BoundProviderFactory.java:72)
    at com.google.inject.internal.ProviderInternalFactory.circularGet(ProviderInternalFactory.java:61)
    at com.google.inject.internal.BoundProviderFactory.get(BoundProviderFactory.java:62)
    at com.google.inject.internal.SingleParameterInjector.inject(SingleParameterInjector.java:38)
    at com.google.inject.internal.SingleParameterInjector.getAll(SingleParameterInjector.java:62)
    at com.google.inject.internal.ConstructorInjector.provision(ConstructorInjector.java:104)
    at com.google.inject.internal.ConstructorInjector.construct(ConstructorInjector.java:85)
    at com.google.inject.internal.ConstructorBindingImpl$Factory.get(ConstructorBindingImpl.java:267)
    at com.google.inject.internal.ProviderToInternalFactoryAdapter$1.call(ProviderToInternalFactoryAdapter.java:46)
    at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1103)
    at com.google.inject.internal.ProviderToInternalFactoryAdapter.get(ProviderToInternalFactoryAdapter.java:40)
    at com.google.inject.internal.SingletonScope$1.get(SingletonScope.java:145)
    at com.google.inject.internal.InternalFactoryToProviderAdapter.get(InternalFactoryToProviderAdapter.java:41)
    at com.google.inject.internal.FactoryProxy.get(FactoryProxy.java:56)
    at com.google.inject.internal.SingleFieldInjector.inject(SingleFieldInjector.java:54)
    at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:132)
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:93)
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:80)
    at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1103)
    at com.google.inject.internal.MembersInjectorImpl.injectAndNotify(MembersInjectorImpl.java:80)
    at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:62)
    at com.google.inject.internal.InjectorImpl.injectMembers(InjectorImpl.java:984)
    at com.google.inject.util.Providers$GuicifiedProviderWithDependencies.initialize(Providers.java:149)
    at com.google.inject.util.Providers$GuicifiedProviderWithDependencies$$FastClassByGuice$$2a7177aa.invoke(<generated>)
    at com.google.inject.internal.cglib.reflect.$FastMethod.invoke(FastMethod.java:53)
    at com.google.inject.internal.SingleMethodInjector$1.invoke(SingleMethodInjector.java:57)
    at com.google.inject.internal.SingleMethodInjector.inject(SingleMethodInjector.java:91)
    at com.google.inject.internal.MembersInjectorImpl.injectMembers(MembersInjectorImpl.java:132)
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:93)
    at com.google.inject.internal.MembersInjectorImpl$1.call(MembersInjectorImpl.java:80)
    at com.google.inject.internal.InjectorImpl.callInContext(InjectorImpl.java:1092)
    at com.google.inject.internal.MembersInjectorImpl.injectAndNotify(MembersInjectorImpl.java:80)
    at com.google.inject.internal.Initializer$InjectableReference.get(Initializer.java:174)
    at com.google.inject.internal.Initializer.injectAll(Initializer.java:108)
    at com.google.inject.internal.InternalInjectorCreator.injectDynamically(InternalInjectorCreator.java:174)
    at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:110)
    at com.google.inject.Guice.createInjector(Guice.java:96)
    at com.google.inject.Guice.createInjector(Guice.java:73)
    at com.google.inject.Guice.createInjector(Guice.java:62)
    at play.api.inject.guice.GuiceBuilder.injector(GuiceInjectorBuilder.scala:126)
    at play.api.inject.guice.GuiceApplicationBuilder.build(GuiceApplicationBuilder.scala:93)
    at play.api.inject.guice.GuiceApplicationLoader.load(GuiceApplicationLoader.scala:21)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1$$anonfun$2.apply(DevServerStart.scala:153)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1$$anonfun$2.apply(DevServerStart.scala:150)
    at play.utils.Threads$.withContextClassLoader(Threads.scala:21)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:150)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1$$anonfun$1.apply(DevServerStart.scala:121)
    at scala.Option.map(Option.scala:146)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:121)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1$$anonfun$apply$1.apply(DevServerStart.scala:119)
    at scala.util.Success.flatMap(Try.scala:230)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:119)
    at play.core.server.DevServerStart$$anonfun$mainDev$1$$anon$1$$anonfun$get$1.apply(DevServerStart.scala:111)
    at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24)
    at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24)
    at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1402)
    at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
    at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
    at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
    at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Caused by: Configuration error: Configuration error[Exception during pool initialization]
    at play.api.Configuration$.configError(Configuration.scala:178)
    at play.api.PlayConfig.reportError(Configuration.scala:1048)
    at play.api.db.HikariCPConnectionPool.create(HikariCPModule.scala:69)
    at play.api.db.PooledDatabase.createDataSource(Databases.scala:199)
    at play.api.db.DefaultDatabase.dataSource$lzycompute(Databases.scala:124)
    at play.api.db.DefaultDatabase.dataSource(Databases.scala:122)
    at play.api.db.DefaultDatabase.getConnection(Databases.scala:143)
    at play.api.db.DefaultDatabase.getConnection(Databases.scala:139)
    at play.api.db.DefaultDBApi$$anonfun$connect$1.apply(DefaultDBApi.scala:44)
    ... 67 more

Answer 1

現在已修復，並且可以正常工作。 問題是我使用了舊的postgresql依賴關系（2011年制造），而當我將其替換為新的依賴關系（2015年12月）后，錯誤就消失了。 感謝@robinj的幫助。