无法使用 java 连接到 sql 服务器

Question

我正在尝试使用 Java 和 Microsoft SQL 服务器连接到本地 sql 服务器。我正在使用 sql 服务器身份验证。

代码如下：

import java.sql.*;


public class Main {
    public static void main(String[] args)  {

        String userName ="testlogin2";
        String password ="pass";

        String url ="jdbc:sqlserver://localhost/LabNoteMap;integratedSecurity=true;"; //LabNoteMap beeing target db
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
            Connection conn = DriverManager.getConnection(url, userName, password);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (SQLException e) {
            e.printStackTrace();
        }

        System.out.println("end");
    }
}

和堆栈跟踪：

"C:\Program Files\Java\jdk-9\bin\java" "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.5\lib\idea_rt.jar=63510:C:\Program Files\JetBrains\IntelliJ IDEA 2017.2.5\bin" -Dfile.encoding=UTF-8 -classpath C:\Users\Deus\IdeaProjects\testMYSQL\out\production\testMYSQL;C:\Users\Deus\Desktop\jdbc\sqljdbc_6.0\enu\jre8\sqljdbc42.jar Main
end
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost/LabNoteMap, port 1433 has failed. Error: "localhost/LabNoteMap. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
    at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:191)
    at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:242)
    at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2369)
    at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:551)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1963)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:1628)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1459)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:773)
    at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1168)
    at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:678)
    at java.sql/java.sql.DriverManager.getConnection(DriverManager.java:229)
    at Main.main(Main.java:13)

Process finished with exit code 0

还有一些 ss:

另请注意，在 Sql 服务器配置中，tcp/ip 已启用且端口设置为 1433。

我想可能是防火墙？但不确定如何检查它或其他东西？

Answer 1

您的连接字符串有误。你应该改变它

String url ="jdbc:sqlserver://localhost/LabNoteMap;integratedSecurity=true;";

至

String url ="jdbc:sqlserver://localhost;databaseName=LabNoteMap;integratedSecurity=true;";

您没有针对要建立连接的数据库。

Answer 2

private static String url="jdbc:sqlserver://localhost:1433;DatabaseName = students";

我正在使用 msbase.jar 和 mssqlserver.jar 以及 msutil.jar，也许你使用了错误的 jar 或者你的 url 是错误的 (DatabaseName = ?)

无法使用 java 连接到 sql 服务器

Can't connect to sql server with java

java

sql

connection

jdbc