连接sqlserver数据库时的错误请帮忙
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
cnn = DriverManager.getConnection("jdbc:microsoft:sqlserver://gsjnchenyf:1433;databaseName=master","sa","aaaaaa");
java.sql.SQLException: [Microsoft][SQLServer JDBC Driver]End of stream was detected on a read.
at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
at com.microsoft.jdbc.sqlserver.tds.TDSRequest.processReply(Unknown Source)
at com.microsoft.jdbc.sqlserver.SQLServerImplConnection.open(Unknown Source)
at com.microsoft.jdbc.base.BaseConnection.getNewImplConnection(Unknown Source)
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:512)
at java.sql.DriverManager.getConnection(DriverManager.java:171)
at COM.test.exec(test.java:27)
at COM.test.main(test.java:80)