//2. 建立連接：Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@10.248.13.5:2902:cmcc", "ngca","Cmcc_0111");  //報錯在建立連接這一行 報錯:java.sql.SQLException: Io 異常: Size Data Unit (SDU) mismatchat oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146)at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:255)at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:387)at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:420)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(DriverManager.java:582)at java.sql.DriverManager.getConnection(DriverManager.java:185)at jdbc.TestRegister.main(TestRegister.java:23)