oracle中：Io 异常: The Network Adapter could not establish the connection

试做一个模拟项目链接oracle数据库的时候，碰到了下面的错误：

java.sql.SQLException: Io 异常: The Network Adapter could not establish the connection
    at 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: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 com.tangjian.drp.util.DbUtil.getConnection(DbUtil.java:62)
    at com.tangjian.drp.util.DbUtil.main(DbUtil.java:101)
null

看到Network Adapter字样的时候，突然想起昨天出现的另一个问题：oracle的【OracleOraDb10g_home1TNSListener】服务启动后会自动关闭（这个可以参考我另外一篇文章）。根据这个错误想到了要怎么解决我现在的错误了。
原先连接数据库的格式是：

<?xml version="1.0" encoding="UTF-8"?>
<tangjian>
    <db-info>
        <driver-name>oracle.jdbc.driver.OracleDriver</driver-name>
        <url>jdbc:oracle:thin:@localhost:1521:tangjian</url>
        <user-name>drp1</user-name>
        <password>drp1</password>
    </db-info>
</tangjian>

现在改成：

<?xml version="1.0" encoding="UTF-8"?>
<tangjian>
    <db-info>
        <driver-name>oracle.jdbc.driver.OracleDriver</driver-name>
        <url>jdbc:oracle:thin:@192.168.1.103:1521:tangjian</url>
        <user-name>drp1</user-name>
        <password>drp1</password>
    </db-info>
</tangjian>

也就是把URL中的 localhost改成自 己本机的IP。