Question

我正在使用PlayFramework（2.3.x）应用程序。我想连接到一个mysql数据库。以下是我在application.conf中提供的配置：

db.default.driver="com.mysql.jdbc.Driver"
db.default.url="jdbc:mysql://localhost/mydb"
db.default.jndiName=DefaultDS
db.default.username=root
db.default.password=root
db.default.logStatements=true
jpa.default=defaultPersistenceUnitName

当我运行应用程序时，我收到以下异常

Oops, cannot start the server.
Configuration error: Configuration error[Cannot connect to database [default]]
    at play.api.Configuration$.play$api$Configuration$$configError(Configuration.scala:94)
    at play.api.Configuration.reportError(Configuration.scala:743)
    at play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:247)
    at play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:238)
    at scala.collection.immutable.List.map(List.scala:273)
    at play.api.db.BoneCPPlugin.onStart(DB.scala:238)
    at play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:91)
    at play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:91)
    at scala.collection.immutable.List.foreach(List.scala:381)
    at play.api.Play$$anonfun$start$1.apply$mcV$sp(Play.scala:91)
    at play.api.Play$$anonfun$start$1.apply(Play.scala:91)
    at play.api.Play$$anonfun$start$1.apply(Play.scala:91)
    at play.utils.Threads$.withContextClassLoader(Threads.scala:21)
    at play.api.Play$.start(Play.scala:90)
    at play.core.StaticApplication.<init>(ApplicationProvider.scala:55)
    at play.core.server.NettyServer$.createServer(NettyServer.scala:253)
    at play.core.server.NettyServer$$anonfun$main$3.apply(NettyServer.scala:289)
    at play.core.server.NettyServer$$anonfun$main$3.apply(NettyServer.scala:284)
    at scala.Option.map(Option.scala:146)
    at play.core.server.NettyServer$.main(NettyServer.scala:284)
    at play.core.server.NettyServer.main(NettyServer.scala)
Caused by: java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3847)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3783)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)
    at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1665)
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1207)
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2249)
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2280)
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2079)
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:794)
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:400)
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399)
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325)
    at java.sql.DriverManager.getConnection(DriverManager.java:664)
    at java.sql.DriverManager.getConnection(DriverManager.java:247)
    at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:363)
    at com.jolbox.bonecp.BoneCP.<init>(BoneCP.java:416)
    at com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120)
    at play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:240)
    ... 18 more

我创建了我的数据库，我可以使用mysql控制台。
我的persistence.xml放在我的conf / META-INF中。以下是persistence.xml
我拥有拥有所有权限的root用户。

有人可以帮我吗？

Answer 1

根据the docs for Play 2.3.x，正确的配置是db.default.user而不是db.default.username。这可能是异常的原因。因此，请将配置更改为：

db.default.driver="com.mysql.jdbc.Driver"
db.default.url="jdbc:mysql://localhost/mydb"
db.default.jndiName=DefaultDS
db.default.user=root
db.default.password=root
db.default.logStatements=true
jpa.default=defaultPersistenceUnitName

Answer 2

您没有通过登录，如行

所示

Caused by: java.sql.SQLException: Access denied for user ''@'localhost' (using password: YES)

使用play框架连接到mysql db时出现异常

2 个答案: