新手学习jbuilder怎么连不上oracle

Question

System.out.println(e);把错误打出来

Answer 1

java.sql.SQLException: Io 异常: The Network Adapter could not establish the connection at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:334) at oracle.jdbc.ttc7.TTC7Protocol.handleIOException(TTC7Protocol.java:3675) at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:352) at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:362) at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:536) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:328) at java.sql.DriverManager.getConnection(DriverManager.java:512) at java.sql.DriverManager.getConnection(DriverManager.java:171) at or1.Test.main(Test.java:17)