使用 UCanAccess 连接到数据库时出现“无效页码 1”错误

Question

我正在关注本教程，只是将连接更改为 UCanAccess。

我导入了所有 jars，但仍然出现错误，我不知道是什么问题

错误

net.ucanaccess.jdbc.UcanaccessSQLException: UCAExc:::3.0.6 invalid page number 1
at net.ucanaccess.jdbc.UcanaccessDriver.connect(UcanaccessDriver.java:264)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at servlets.ConnectionManager.getConnection(ConnectionManager.java:22)
at servlets.UserDAO.login(UserDAO.java:35)
at servlets.LoginServlet.doGet(LoginServlet.java:39)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)

和代码

package servlets;


import java.sql.*;


public class ConnectionManager {

   static Connection conn;
   static String url;


   public static Connection getConnection()
   {
     try
     {           

        Class.forName("net.ucanaccess.jdbc.UcanaccessDriver");
          String url="jdbc:ucanaccess://C:/workspaceWeb/LoginExample/src/servlets/usersetup.db";

         System.out.println("blabla");
         conn = DriverManager.getConnection(url,"UserName", "PassWord"); 
         System.out.println("commecla");

     }

     catch (SQLException | ClassNotFoundException ex)
     {
        ex.printStackTrace();
     }
return conn;

}
}

Answer 1

您正在尝试使用 UCanAccess 打开一个 SQLite 数据库，但这是行不通的。 UCanAccess 只能打开 Access 数据库（.accdb、.mdb 或相关）。 要使用 SQLite 数据库，您需要使用 Xerial 的SQLite JDBC Driver 之类的东西。