数据库错误

java.lang.NullPointerException
at java.lang.String.<init>(Unknown Source)
at oracle.sql.CharacterSet.AL32UTF8ToString(CharacterSet.java:1517)
at oracle.jdbc.driver.DBConversion.CharBytesToString(DBConversion.java:589)
at oracle.jdbc.driver.DBConversion.CharBytesToString(DBConversion.java:542)
at oracle.jdbc.driver.T4CTTIoauthenticate.receiveOauth(T4CTTIoauthenticate.java:816)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:362)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:414)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:165)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:35)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:801)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at test.test.getConnection(test.java:29)
at test.test.main(test.java:48)
Exception in thread "main" java.lang.NullPointerException
at test.test.query(test.java:58)
at test.test.main(test.java:49)

注意红色部分，连接oracle数据库是11g和10g所需的jar包是不一样的，所有此错误可能是jar包错误，需要更新jar包，或者是在对数据库的操作部分有自断是在数据库中不存在的