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作者

无法打开登录 'nysips' 中请求的数据库。登录失败。

am2000

发贴: 6
积分: 0

于 2005-07-18 14:16

java.sql.SQLException: [Microsoft][SQLServer JDBC Driver][SQLServer]无法打开登录 'nysips' 中请求的数据库。登录失败。
  at com.microsoft.jdbc.base.BaseExceptions.getException(Unknown Source)
  at com.microsoft.jdbc.sqlserver.tds.TDSRequest.processErrorToken(Unknown Source)
  at com.microsoft.jdbc.sqlserver.tds.TDSRequest.processReplyToken(Unknown Source)
  at com.microsoft.jdbc.sqlserver.tds.TDSLoginRequest.processReplyToken(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:525)
  at java.sql.DriverManager.getConnection(DriverManager.java:171)
  at db.Connect.getConnection(Connect.java:27)
  at db.Connect.displayDbProperties(Connect.java:44)
  at db.Connect.main(Connect.java:80)
Error Trace in getConnection() : [Microsoft][SQLServer JDBC Driver][SQLServer]无法打开登录 'nysips' 中请求的数据库。登录失败。
Error: No active Connection

是什么原因？

作者

Re:无法打开登录 'nysips' 中请求的数据库。登录失败。 [Re:am2000]

am2000

发贴: 6
积分: 0

于 2005-07-18 14:17

测试程序

import java.*;
public class Connect{
private java.sql.Connection con = null;
private final String url = "jdbc:microsoft:sqlserver://";
private final String serverName= "localhost";
private final String portNumber = "1433";
private final String databaseName= "nysips";
private final String userName = "sa";
private final String password = "111111";
// Informs the driver to use server a side-cursor,
// which permits more than one active statement
// on a connection.
private final String selectMethod = "cursor";

// Constructor
public Connect(){}

private String getConnectionUrl(){
return url+serverName+":"+portNumber+";databaseName="+databaseName+";selectMethod="+selectMethod+";";
}

private java.sql.Connection getConnection(){
try{
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
con = java.sql.DriverManager.getConnection(getConnectionUrl(),userName,password);
if(con!=null) System.out.println("Connection Successful!");
}catch(Exception e){
e.printStackTrace();
System.out.println("Error Trace in getConnection() : " + e.getMessage());
}
return con;
}

/*
Display the driver properties, database details
*/

public void displayDbProperties(){
java.sql.DatabaseMetaData dm = null;
java.sql.ResultSet rs = null;
try{
con= this.getConnection();
if(con!=null){
dm = con.getMetaData();
System.out.println("Driver Information");
System.out.println("\tDriver Name: "+ dm.getDriverName());
System.out.println("\tDriver Version: "+ dm.getDriverVersion ());
System.out.println("\nDatabase Information ");
System.out.println("\tDatabase Name: "+ dm.getDatabaseProductName());
System.out.println("\tDatabase Version: "+ dm.getDatabaseProductVersion());
System.out.println("Avalilable Catalogs ");
rs = dm.getCatalogs();
while(rs.next()){
System.out.println("\tcatalog: "+ rs.getString(1));
}
rs.close();
rs = null;
closeConnection();
}else System.out.println("Error: No active Connection");
}catch(Exception e){
e.printStackTrace();
}
dm=null;
}

private void closeConnection(){
try{
if(con!=null)
con.close();
con=null;
}catch(Exception e){
e.printStackTrace();
}
}
public static void main(String[] args) throws Exception
{
Connect myDbTest = new Connect();
myDbTest.displayDbProperties();
}
}

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