Question

我在服务器pc上有MS SQL Server 2008数据库，我正在尝试从本地计算机连接该数据库。在我的本地计算机上，我有MS SQL Server 2012，我在本地电脑上连接了2008服务器数据库。我还添加了外部jar文件sqljdbc42.jar。当我运行我的java Web应用程序时，我得到一个ClassNotFoundException。

代码：

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");

Connection con=DriverManager.getConnection(Provider.CONNECTION_URL,Provider.USERNAME,Provider.PASSWORD);
        System.out.println("Connection........."+con);
        Statement stmt=con.createStatement();
        System.out.println("Statement...");
        String sql="select User_name,Password from tblBTUserMaster";
        ResultSet rs=stmt.executeQuery(sql);
        rs.next();
         name1=rs.getString(4);
         password1=rs.getString(6);



Exception : java.lang.ClassNotFoundException: com.microsoft.sqlserver.jdbc.SQLServerDriver
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Unknown Source)
    at com.LoginBean.validate(LoginBean.java:37)
    at com.ControllerServlet.doPost(ControllerServlet.java:31)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Answer 1

您必须在WEB-INF - ＆gt; lib中添加sqljdbc42.jar jar文件。只需复制此jar文件并粘贴到lib文件夹中，然后运行它。

与MS SQL Server的连接中发生ClassNotFoundException

1 个答案: