苦恼的问题"不能在 UTF8 和 UCS2 之间转换: failUTF8Conv"，有人遇到相同的问题吗？

ERROR[http-8080-Processor25](ProxoolDriver.java:92)-Problem
java.sql.SQLException: 不能在 UTF8 和 UCS2 之间转换: failUTF8Conv
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.check_error(DBError.java:1130)
at oracle.jdbc.dbaccess.DBConversion.failUTF8Conv(DBConversion.java:2261)
at oracle.jdbc.dbaccess.DBConversion.utf8BytesToJavaChars(DBConversion.java:2061)
at oracle.jdbc.dbaccess.DBConversion.utf8BytesToString(DBConversion.java:1976)
at oracle.jdbc.dbaccess.DBConversion.CharBytesToString(DBConversion.java:543)
at oracle.jdbc.ttc7.TTIoer.processWarning(TTIoer.java:335)
at oracle.jdbc.ttc7.O3log.receive2nd(O3log.java:523)
at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:278)
at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:346)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:468)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:314)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at org.logicalcobwebs.proxool.ProxyFactory.buildProxyConnection(ProxyFactory.java:41)
at org.logicalcobwebs.proxool.Prototyper.buildConnection(Prototyper.java:150)
at org.logicalcobwebs.proxool.PrototyperController.buildConnection(PrototyperController.java:88)
at org.logicalcobwebs.proxool.ConnectionPool.getConnection(ConnectionPool.java:222)
at org.logicalcobwebs.proxool.ProxoolDriver.connect(ProxoolDriver.java:89)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at com.sitech.struts.DB.DBConn.getConnection(DBConn.java:39)
at com.sitech.struts.DB.DBConn.getStatement(DBConn.java:54)
at com.sitech.struts.DB.DBConn.executeQuery(DBConn.java:72)
at com.sitech.struts.action.LoginAction.execute(LoginAction.java:51)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)