Java 获取可池资源时发生异常

运行我的web应用程序时，我在JBoss连接到mySql时遇到了这个错误。有人知道如何解决这个问题吗

15:00:21,875 INFO  [com.mchange.v2.resourcepool.BasicResourcePool] (com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1) An exception occurred while acquiring a poolable resource. Will retry.: java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3996) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1284) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2142) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:781) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) [mysql-connector-java-5.1.10.jar:]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [rt.jar:1.7.0_21]
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [rt.jar:1.7.0_21]
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [rt.jar:1.7.0_21]
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525) [rt.jar:1.7.0_21]
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:352) [mysql-connector-java-5.1.10.jar:]
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:284) [mysql-connector-java-5.1.10.jar:]
    at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:119) [c3p0-0.9.1.2.jar:0.9.1.2]
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:143) [c3p0-0.9.1.2.jar:0.9.1.2]
    at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:132) [c3p0-0.9.1.2.jar:0.9.1.2]
    at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:137) [c3p0-0.9.1.2.jar:0.9.1.2]
    at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1014) [c3p0-0.9.1.2.jar:0.9.1.2]
    at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:32) [c3p0-0.9.1.2.jar:0.9.1.2]
    at com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run(BasicResourcePool.java:1810) [c3p0-0.9.1.2.jar:0.9.1.2]
    at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:547) [c3p0-0.9.1.2.jar:0.9.1.2]

15:00:21875 INFO[com.mchange.v2.resourcepool.BasicResourcePool]（com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread-#1）获取可池资源时发生异常。将重试：java.sql.SQLException:user'root'@'localhost'的访问被拒绝（使用密码：是）
在com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1055）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.SQLError.createSQLException（SQLError.java:956）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3558）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3490）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:919）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.MysqlIO.secureAuth411（MysqlIO.java:3996）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.MysqlIO.doHandshake（MysqlIO.java:1284）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.ConnectionImpl.createNewIO（ConnectionImpl.java:2142）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.ConnectionImpl.（ConnectionImpl.java:781）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.JDBC4Connection.（JDBC4Connection.java:46）[mysql-connector-java-5.1.10.jar:]
在sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）[rt.jar:1.7.0\u 21]
在sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:57）[rt.jar:1.7.0\u 21]
在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）[rt.jar:1.7.021]
在java.lang.reflect.Constructor.newInstance（Constructor.java:525）[rt.jar:1.7.0_21]
在com.mysql.jdbc.Util.handleNewInstance（Util.java:406）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.ConnectionImpl.getInstance（ConnectionImpl.java:352）[mysql-connector-java-5.1.10.jar:]
在com.mysql.jdbc.NonRegisteringDriver.connect（NonRegisteringDriver.java:284）[mysql-connector-java-5.1.10.jar:]
在com.mchange.v2.c3p0.DriverManagerDataSource.getConnection（DriverManagerDataSource.java:119）[c3p0-0.9.1.2.jar:0.9.1.2]
在com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection（WrapperConnectionPoolDataSource.java:143）[c3p0-0.9.1.2.jar:0.9.1.2]
在com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection（WrapperConnectionPoolDataSource.java:132）[c3p0-0.9.1.2.jar:0.9.1.2]
在com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.AcquisiteSource（C3P0PooledConnectionPool.java:137）[c3p0-0.9.1.2.jar:0.9.1.2]
在com.mchange.v2.resourcepool.BasicResourcePool.doAcquire（BasicResourcePool.java:1014）[c3p0-0.9.1.2.jar:0.9.1.2]
访问com.mchange.v2.resourcepool.BasicResourcePool.access$800（BasicResourcePool.java:32）[c3p0-0.9.1.2.jar:0.9.1.2]
在com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask.run（BasicResourcePool.java:1810）[c3p0-0.9.1.2.jar:0.9.1.2]
在com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run（ThreadPoolAsynchronousRunner.java:547）[c3p0-0.9.1.2.jar:0.9.1.2]

已回答错误，并明确表示用户没有访问权限。您使用了错误的用户，或者需要向根用户授予正确的访问权限。