java.lang.ClassNotFoundException：当我执行代码时显示的oracle.jdbc.internal.XMLTypeIntf异常？

Question

我试图让在文本框中从数据库和显示XML值，但是当我执行的代码，提示以下异常，当我执行的代码，

同样地，我试图让从字符串值（文字）数据库和文本框中显示其工作正常与XMLType和异常问题。

我执行使用Eclipse应用程序的代码，其中包括罐子xdb6，ojdbc14，xmlparserv2

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: oracle/jdbc/internal/XMLTypeIntf at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(Unknown Source) at java.security.SecureClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.defineClass(Unknown Source) at java.net.URLClassLoader.access$100(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at oracle.xdb.XMLTypeFactory.create(XMLTypeFactory.java:74) at oracle.sql.OPAQUE.toClass(OPAQUE.java:376) at oracle.sql.OPAQUE.toJdbc(OPAQUE.java:318) at oracle.jdbc.driver.NamedTypeAccessor.getObject(NamedTypeAccessor.java:144) at oracle.jdbc.driver.NamedTypeAccessor.getObject(NamedTypeAccessor.java:100) at oracle.jdbc.driver.OracleResultSetImpl.getObject(OracleResultSetImpl.java:915) at Searchdb.actionPerformed(Searchdb.java:327) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$200(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Caused by: java.lang.ClassNotFoundException: oracle.jdbc.internal.XMLTypeIntf at java.net.URLClassLoader$1.run(Unknown Source) at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 55 more

String strxa = tfx1.getText(); //here i will get the student id from user. 

    Class.forName("oracle.jdbc.driver.OracleDriver"); 
    Connection con = DriverManager.getConnection("jdbc:oracle:thin:@//host:1521/service","username","pwd"); 
    Statement st =con.createStatement(); 
    String str3 ="select student_xml from student where student_id='"+strxa+"'"; 

    System.out.println(str3); 

    ResultSet rs = st.executeQuery(str3); 
    System.out.println(str3); 

    if (rs.next()) { 

      XMLType poxml = (XMLType)rs.getObject(1); 
      System.out.println(poxml); //when i try to print this no output in console 
      String poString =poxml.getStringVal(); 
      System.out.println(poString); when i try to print this no output in console 


      //Sets Records in TextFields. 
      area.setText(poString); 


     } 

有我的罐子任何问题或code.when我试图打印while循环内的值不会被打印在控制台中。

Answer 1

此错误告诉我您正在使用不兼容的xdb和ojdbc JAR版本。

根据您的堆栈跟踪，类oracle.xdb.XMLTypeFactory（位于xdb JAR中）取决于类oracle.jdbc.internal.XMLTypeIntf。后一类可以在12c版本的JDBC驱动程序JAR中找到，它可以从this page下载，但不是在JDBC驱动程序之前的版本中。

将ojdbc升级到更高版本，或将xdb降级到较旧版本。