我目前正在大学的一门课上做一个项目。我正在学习连接和操作数据库,我们使用的是 Microsoft .accdb 文件。
以下是我目前掌握的情况。
/* Perform database operations */
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
System.out.println("Driver loaded");
connection = DriverManager.getConnection("jdbc:odbc:Lab3.accdb");
System.out.println("Database connected");
statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("");
while (resultSet.next()) {
output.write("<p>" + resultSet.getString(1) + "\t" +
resultSet.getString(2) + "\t" + resultSet.getString(3) + "</p>");
}
connection.close();
} catch (ClassNotFoundException|SQLException e) {
System.out.println("Database Access Error.");
e.printStackTrace();
}
在查找"sun.jdbc.odbc.JdbcOdbcDriver"时,我得到了以下输出。
SEVERE: java.lang.ClassNotFoundException: sun.jdbc.odbc.JdbcOdbcDriver
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1761)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1611)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at changepass.ChangePasswordServlet.processRequest(ChangePasswordServlet.java:47)
at changepass.ChangePasswordServlet.doGet(ChangePasswordServlet.java:83)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:113)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
at java.lang.Thread.run(Thread.java:744)
看起来很简单。似乎我缺少驱动程序或类似的东西。但我很难找到解决方法。驱动程序包含在 JDK 中吗?我必须单独下载吗?是否取决于我的操作系统?(Mac OS X 10.9)。还是我在代码中做错了什么?
如果您能提供帮助,我将感激不尽!谢谢!
其他信息:
[James@toodarkpark: ~]$ java -version
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
[James@toodarkpark: ~]$
正如问题评论中提到的,JDBC-ODBC Bridge 顾名思义,只是 JDBC 层与 ODBC 层对话的一种机制。即使你的 Mac 上有 JDBC-ODBC Bridge,你也需要有
因此,对大多数人来说,使用 JDBC-ODBC Bridge 技术来操作 ACE/Jet ("Access") 数据库只有在 Windows 下才是真正实用的选择。同样重要的是,JDBC-ODBC Bridge will be 已在 Java 8 中删除(参考:此处)。
还有其他从 Java 操作 ACE/Jet 数据库的方法,如 UCanAccess 和 Jackcess。这两种方法都是纯 Java 实现,因此可以在非 Windows 平台上运行。有关如何使用 UCanAccess 的详细信息,请参阅
[不使用 ODBC 从 Java 操作 Access 数据库][5]
对我来说,ODBC-Bridge 也不起作用。 我找到了使用 ODBC 驱动程序初始化 ODBC 连接的方法。
import java.sql.*;
public class UserLogin
{
public static void main(String[] args)
{
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
// C:\\databaseFileName.accdb" - location of your database
String url = "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb, *.accdb)};DBQ=" + "C:\\emp.accdb";
// specify url, username, pasword - make sure these are valid
Connection conn = DriverManager.getConnection(url, "username", "password");
System.out.println("Connection Succesfull");
}
catch (Exception e)
{
System.err.println("Got an exception! ");
System.err.println(e.getMessage());
}
}
}