我试图从数据库中获取xml值并显示在文本框中,但是当我执行代码时执行以下异常时执行代码,
类似地,我试图从数据库中获取字符串值(文本),并在文本框中显示其工作的fine.problem XMLType和异常。
我正在使用eclipse应用程序执行代码并包含jar xdb6,ojdbc14,xmlparserv2
线程“AWT-EventQueue-0”中的异常java.lang.NoClassDefFoundError: oracle / jdbc / internal / XMLTypeIntf at java.lang.ClassLoader.defineClass1(Native Method)at java.lang.ClassLoader.defineClass(未知来源)at java.security.SecureClassLoader.defineClass(未知来源)at java.net.URLClassLoader.defineClass(未知来源)at java.net.URLClassLoader.access $ 100(未知来源)at java.net.URLClassLoader $ 1.run(未知来源)at java.net.URLClassLoader $ 1.run(未知来源)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(未知来源)at java.lang.ClassLoader.loadClass(未知来源)at sun.misc.Launcher $ AppClassLoader.loadClass(未知来源)at java.lang.ClassLoader.loadClass(未知来源)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) 在 oracle.jdbc.driver.NamedTypeAccessor.getObject(NamedTypeAccessor.java:100) 在 oracle.jdbc.driver.OracleResultSetImpl.getObject(OracleResultSetImpl.java:915) 在Searchdb.actionPerformed(Searchdb.java:327)at javax.swing.AbstractButton.fireActionPerformed(未知来源)at javax.swing.AbstractButton $ Handler.actionPerformed(Unknown Source)at javax.swing.DefaultButtonModel.fireActionPerformed(未知来源)at javax.swing.DefaultButtonModel.setPressed(未知来源)at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(未知 来自)java.awt.Component.processMouseEvent(未知来源)at javax.swing.JComponent.processMouseEvent(未知来源)at java.awt.Component.processEvent(未知来源)at java.awt.Container.processEvent(未知来源)at java.awt.Component.dispatchEventImpl(未知来源)at java.awt.Container.dispatchEventImpl(未知来源)at java.awt.Component.dispatchEvent(未知来源)at java.awt.LightweightDispatcher.retargetMouseEvent(未知来源)at java.awt.LightweightDispatcher.processMouseEvent(未知来源)at java.awt.LightweightDispatcher.dispatchEvent(未知来源)at java.awt.Container.dispatchEventImpl(未知来源)at java.awt.Window.dispatchEventImpl(未知来源)at java.awt.Component.dispatchEvent(未知来源)at java.awt.EventQueue.dispatchEventImpl(未知来源)at java.awt.EventQueue.access $ 200(未知来源)at java.awt.EventQueue $ 3.run(未知来源)at java.awt.EventQueue $ 3.run(未知来源)at java.security.AccessController.doPrivileged(Native Method)at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(未知 来源)at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(未知 来自)java.awt.EventQueue $ 4.run(未知来源)at java.awt.EventQueue $ 4.run(未知来源)at java.security.AccessController.doPrivileged(Native Method)at java.security.ProtectionDomain $ 1.doIntersectionPrivilege(未知 来自)java.awt.EventQueue.dispatchEvent(未知来源)at java.awt.EventDispatchThread.pumpOneEventForFilters(未知来源) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) 在java.awt.EventDispatchThread.pumpEventsForHierarchy(未知 来自java.awt.EventDispatchThread.pumpEvents(未知来源) at java.awt.EventDispatchThread.pumpEvents(Unknown Source)at java.awt.EventDispatchThread.run(未知来源)引起: java.lang.ClassNotFoundException:oracle.jdbc.internal.XMLTypeIntf at java.net.URLClassLoader $ 1.run(未知来源)at java.net.URLClassLoader $ 1.run(未知来源)at java.security.AccessController.doPrivileged(Native Method)at java.net.URLClassLoader.findClass(未知来源)at java.lang.ClassLoader.loadClass(未知来源)at sun.misc.Launcher $ AppClassLoader.loadClass(未知来源)at java.lang.ClassLoader.loadClass(未知来源)... 55更多
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);
}
我的罐子或代码有什么问题。当我试图在while循环中打印它时,它不会在控制台中打印出来。
答案 0 :(得分:3)
此错误告诉我您使用的是xdb和ojdbc JAR的不兼容版本。
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JDBC驱动程序JAR的12c版本中找到,它可以从this page下载,但不能在早于此版本的JDBC驱动程序版本中找到。
将ojdbc升级到更高版本,或将xdb降级到旧版本。