总报这个错,jar包也导了
java.sql.SQLException: [Microsoft][SQLServer 2000 Driver for JDBC]Error establ
hing socket.
at com.microsoft.jdbc.base.BaseExceptions.createException(Unknown Sour
)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.sqlserver.tds.TDSConnection.<init>(Unknown Sourc
at com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown S
rce)
at com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown
ource)
at com.microsoft.jdbc.base.BaseConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseDriver.connect(Unknown Source)
at java.sql.DriverManager.getConnection(DriverManager.java:582)
at java.sql.DriverManager.getConnection(DriverManager.java:185)
at conn.DBConnection.getConnection(DBConnection.java:18)
at dao.UsersDAO.excuteQuery(UsersDAO.java:28)
at DataBaseDemo2.main(DataBaseDemo2.java:18)
Exception in thread "main" java.lang.NullPointerException
at dao.UsersDAO.excuteQuery(UsersDAO.java:30)
at DataBaseDemo2.main(DataBaseDemo2.java:18)