Io 异常: The Network Adapter could not establish the connection解决
环境：Oracle11g + MyEclipse 6.5 + JDK1.6
问题：JDBC连接Oracle数据库出现以下错误：
java.sql.SQLRecoverableException: Io 异常: The Network Adapter could not establish the connectionat oracle.jdbc.driver.SQLStateMapping.newSQLException(SQLStateMapping.java:101)at oracle.jdbc.driver.DatabaseError.newSQLException(DatabaseError.java:112)at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:173)at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:229)at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:458)at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:411)at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:490)at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:202)at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:33)at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:474)at java.sql.DriverManager.getConnection(Unknown Source)at java.sql.DriverManager.getConnection(Unknown Source)at chap6.DBUtil.getConnection(DBUtil.java:14)at chap6.StatementDemo.main(StatementDemo.java:15)java.sql.SQLException: 驱动错误或连接失败！at chap6.DBUtil.getConnection(DBUtil.java:20)at chap6.StatementDemo.main(StatementDemo.java:15)
解决：
关闭防火墙解决问题。
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参考资料：http://hi.baidu.com/jazzy%C0%DA%C0%DA/blog/item/190bff055023fd77020881ae.html#0
