java.sql.SQLException：找不到适合 jdbc:microsoft:sqlserver 的驱动程序

Question

当我尝试运行该程序时出现此异常。这是微软的例子之一。我已经通过项目属性将 sqljdbc4.jar 添加到 netbeans 的类路径中以进行编译和运行。我还测试了可以通过使用下面的 import 语句找到该类 - 编译期间没有错误，因此它必须找到 jar。

它可能与 sqldbc4.jar 引用的 dll 或某些 sql dll 有关吗？

这是确切的例外，下面是确切的代码，除了密码。

例外：

 run:
java.sql.SQLException: No suitable driver found for jdbc:microsoft:sqlserver://localhost:1433;databaseName=HealthCareDatabase
Error Trace in getConnection() : No suitable driver found for jdbc:microsoft:sqlserver://localhost:1433;databaseName=HealthCareDatabase
Error: No active Connection
    at java.sql.DriverManager.getConnection(DriverManager.java:602)
    at java.sql.DriverManager.getConnection(DriverManager.java:185)
    at javaapplication1.Connect.getConnection(Connect.java:35)
    at javaapplication1.Connect.displayDbProperties(Connect.java:50)
    at javaapplication1.JavaApplication1.main(JavaApplication1.java:23)
BUILD SUCCESSFUL (total time: 1 second)

代码：

  package javaapplication1;
import com.microsoft.sqlserver.jdbc.SQLServerDriver;

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 = "HealthCareDatabase";
    private final String userName = "larry";
    private final String password = "xxxxxxx";

    // Constructor
    public Connect() {
    }

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

    private java.sql.Connection getConnection() {
        try {
            Class.forName("com.microsoft.sqlserver.jdbc.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;
    }

    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();
    }

}

原文由 Larry Watanabe 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

您的网址应该是 jdbc:sqlserver://server:port;DatabaseName=dbname

和类名应该像 com.microsoft.sqlserver.jdbc.SQLServerDriver

使用 MicrosoftSQL Server JDBC 驱动程序 2.0

原文由 Piyush Mattoo 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

对于希望通过使用 Maven 来解决相同问题的人。在 POM 中添加如下依赖：

 <dependency>
    <groupId>com.microsoft.sqlserver</groupId>
    <artifactId>mssql-jdbc</artifactId>
    <version>7.0.0.jre8</version>
</dependency>

并使用以下代码进行连接：

 String connectionUrl = "jdbc:sqlserver://localhost:1433;databaseName=master;user=sa;password=your_password";

try {
    System.out.print("Connecting to SQL Server ... ");
    try (Connection connection = DriverManager.getConnection(connectionUrl))        {
        System.out.println("Done.");
    }
} catch (Exception e) {
    System.out.println();
    e.printStackTrace();
}

查找 此 链接以获取其他 CRUD 类型的查询。

原文由 Shams 发布，翻译遵循 CC BY-SA 4.0 许可协议