4

我在 Windows 身份验证中在 localhost 上运行此代码片段，但出现以下错误，但我已经在我的类路径中添加了 sqljdbc4 jar，并且在从 Eclipse 运行时，我还在构建路径中添加了 jar

import java.io.*;
import java.sql.*;
import java.util.GregorianCalendar;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

class  Cms_truncate
{
    public static void main(String[] args) 
    {
         Calendar cal = new GregorianCalendar();

         //String name="cmscim";
                 Connection conn = null;

         String url = "jdbc:sqlserver://localhost\SQLEXPRESS;databasename=yatin";
         String driver = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
         String userName = ""; 
         String password = "";
         Statement stmt;
         try
         {

         Class.forName(driver);//.newInstance();
         conn = DriverManager.getConnection(url,userName,password);
         String query = "truncate table cim";
         stmt = conn.createStatement();
         int flag = stmt.executeUpdate(query);
         System.out.println("flag = "+flag); 
         conn.close();
        System.out.println("");
         } catch (Exception e) {
         e.printStackTrace();
         }

    }
}

错误：

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. 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:190)
    at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:241)
    at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2243)
    at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:491)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1309)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:991)
    at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:827)
    at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1012)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at java.sql.DriverManager.getConnection(Unknown Source)
    at Cms_truncate.main(Cms_truncate.java:28)

请帮帮我。

4

5 回答 5

10

此错误不是“身份验证错误”，而是由于“连接被拒绝”而导致的“连接错误”。这意味着您需要指定正确的端口号。您需要检查 SQL Server 配置并更新连接字符串。

根据MSDN docs，连接字符串应如下所示：

jdbc:sqlserver://localhost:<insert_proper_port_here>\SQLEXPRESS;databasename=yatin

您没有提供用户名或密码，一旦您弄清楚端口号，您可能需要这样做。有关详细信息，请参阅参考文档。

于 2013-04-20T16:26:20.613 回答
4

我认为是配置问题。

Go to Run -> SQL Server Configuration Manger

Expand -> SQL Server *version_no* Network Configuration

Then click on - "Protocol for SQLEXPRESS"

如果您找到TCP/IP带有状态的协议，Disabled那么您需要enable它。

另外，你需要重启服务：打开cmd>输入Services，然后向下滚动到SQL Server(MSSQLServer)，然后重启服务

于 2013-10-23T14:11:49.517 回答
4

首先，当您在 URL 中使用 SQL 实例名称时，您必须指定 //[serverName[\\instanceName][:portNumber]]databaseName

例如：jdbc:sqlserver://localhost\\SQLEXPRESS:1433;databasename=yatin

一旦完成下一步：-

  1. 转到所有程序-> 搜索 SQL Server 配置管理器。打开它
  2. 在左侧窗格中展开 SQL Server 网络配置
  3. 单击实例名称的协议在大多数情况下，它将是 SQLEXPRESS 的协议
  4. 单击 TCP IP。TCP IP 属性窗口将打开
  5. 选择启用的属性并将所有属性侦听为“YES”
  6. 导航到 IP 地址选项卡并检查 ip all section TC Dynamic port 是否为 1433，如果不是，则设置它

  7. 然后申请并确定

  8. 现在转到左窗格中 SQL Server 配置管理器下的 SQL Server 服务部分。点击它

  9. 在大多数情况下，您将看到数据库引擎正在运行一个实例名称为 SQLEXPRESS 的数据库引擎，右键单击它并停止它，然后重新启动它。

现在重新运行代码

于 2016-06-22T20:21:14.803 回答
2

您忘记提及实例名称。请参阅构建连接 URL解释如何在 sqlserver 中使用连接 URL

如果您没有提及完整的服务器名称，那么您会收到类似的错误

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost , port 1433 has failed. Error: "Connection refused: connect. 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.".

我的服务器名称是V_UDAY\FRAMEWORK,我在（在 Java 代码中）删除FRAMEWORK实例URL并执行，然后出现如下错误。

com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host V_UDAY, port 1433 has failed. Error: "Connection refused: connect. 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:190)
at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:241)
at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2243)
at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:491)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1309)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:991)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:827)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1012)
at java.sql.DriverManager.getConnection(DriverManager.java:571)
at java.sql.DriverManager.getConnection(DriverManager.java:215)
at com.testsql.SqlServerDatabaseConnectionUsingJava.getLocalConnection(SqlServerDatabaseConnectionUsingJava.java:28)
at com.testsql.SqlServerDatabaseConnectionUsingJava.main(SqlServerDatabaseConnectionUsingJava.java:18)
Exception in getLocalConeection() The TCP/IP connection to the host V_UDAY, port 1433 has failed. Error: "Connection refused: connect. 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.".

下图显示了您的服务器名称，并带有slash分隔符

SQLSERVER_LoginPage

执行以下 Java 程序需要 sqljdbc4。下载sqljdbc4 jar 或从Microsoft JDBC Driver 4.0 for SQL Server下载。

使用 Java 连接到 sqlserver 的示例。这JSF是数据库名称。

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class SqlServerDatabaseConnectionUsingJava {
    private static Connection connection = null;
    //1.jdbc driver name
    private static String SQL_JDBC_DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
    // 2. Database URL, V_UDAY\FRAMEWORK is ServerName and JSF is DataBase name
    private static String URL = "jdbc:sqlserver://V_UDAY;instanceName=FRAMEWORK;databaseName=JSF";
    //3.Database credentials
    private static String USERNAME = "udaykiran";//UserName
    private static String PASSWORD = "Pa55word";//Password

public static void main(String[] args) {
    getLocalConnection();
}

public static Connection getLocalConnection() {
    try {
        Class.forName(SQL_JDBC_DRIVER);// Register jdbc driver

        System.out.println("****Connect to Database****");

        //4. open a connection
        connection = DriverManager.getConnection(URL, USERNAME, PASSWORD);

        System.out.println("DataBase connect to: "+ connection.getMetaData().getDriverName());
        System.out.println("URL: "+ connection.getMetaData().getURL());

        setConnectionClose();
        System.out.println("Database Connection Closed");
    } catch (Exception e) {
        e.printStackTrace();
        System.err.println("Exception in getLocalConeection() "+e.getMessage());
    }
    return connection;
}

public static void setConnectionClose() throws SQLException {
    if (connection != null) {
        connection.close();
    }
}

}

注意：如果您有其他删除实例名称FRAMEWORK，请提及实例名称。url

于 2014-01-27T08:35:18.970 回答
0

根据微软文档

String url = "jdbc:sqlserver://localhost\SQLEXPRESS:[your_port_tcp];databasename=yatin";

https://msdn.microsoft.com/pt-br/library/ms378428(v=sql.110).aspx

于 2015-06-19T17:15:23.077 回答