JDBC connection Oracle error under linux

cqzc1984

Exception in thread "main" java.sql.SQLException: Io
ould not establish the connection
        at oracle.jdbc.driver.DatabaseError.throwSqlException (DatabaseError.java
: 111)
        at oracle.jdbc.driver.DatabaseError.throwSqlException (DatabaseError.java
: 145)
        at oracle.jdbc.driver.DatabaseError.throwSqlException (DatabaseError.java
: 254)
        at oracle.jdbc.driver.T4CConnection.logon (T4CConnection.java:386)
        at oracle.jdbc.driver.PhysicalConnection. <init> (PhysicalConnection.java:
413)
        at oracle.jdbc.driver.T4CConnection. <init> (T4CConnection.java:164)
        at oracle.jdbc.driver.T4CDriverExtension.getConnection (T4CDriverExtensio
n.java:34)
        at oracle.jdbc.driver.OracleDriver.connect (OracleDriver.java:752)
        at java.sql.DriverManager.getConnection (DriverManager.java:525)
        at java.sql.DriverManager.getConnection (DriverManager.java:171)
        at Test.main (Test.java:12)

petwolf007

Non-procedural issues,
1. Whether to connect the network cable
2. See if the IP and user name are correct

136617666

There is a problem with the network connection ~~

catmay

See if there are open ports or the like. Ha ha, this kind of error is generally not a program problem.

wh_family

Ping the database server to see if the IP is working.
If it works, use a sqlplus to connect to the database to see if you can log in!