对于想了解将节点转换为提供ClassCastException的元素的读者，本文将提供新的信息，我们将详细介绍节点怎么转换，并且为您提供关于Causedby:java.lang.ClassCastEx

对于想了解将节点转换为提供ClassCastException的元素的读者，本文将提供新的信息，我们将详细介绍节点怎么转换，并且为您提供关于Caused by: java.lang.ClassCastException、ClassCastException、ClassCastException $ Proxy无法转换为使用aop、ClassCastException 异常的有价值信息。

• 将节点转换为提供ClassCastException的元素（节点怎么转换）
• Caused by: java.lang.ClassCastException
• ClassCastException
• ClassCastException $ Proxy无法转换为使用aop
• ClassCastException 异常

将节点转换为提供ClassCastException的元素（节点怎么转换）

这里n2是我的NodeList，我只想查看我的根元素的第一个子节点

public void ClickMe(View view){    Node rootElement=n2.item(0);    NodeList child=rootElement.getChildNodes();    Node first=child.item(0);    //ClassCastException error is coming whenever i am casting first to Element.    Element nm=(Element)first;    Option q= getOption(nm,first);    Log.i(TAG,"the name is was talking about is : "+ q.getName());}

这就是logcat所说的

07-31 20:32:38.376: E/AndroidRuntime(2950): Caused by: java.lang.ClassCastException: org.apache.harmony.xml.dom.TextImpl cannot be cast to org.w3c.dom.Element

答案1

像这样尝试。

NodeList LOP = odoc.getElementsByTagName("Your_XML_Top_Element");                Node FPN =LOP.item(0);                try{                if(FPN.getNodeType() == Node.ELEMENT_NODE)                    {                    Element token = (Element)FPN;                    NodeList oNameList1 = token.getElementsByTagName("Your_XML_Sub_Node");                    Element firstNameElement = (Element)oNameList1.item(0);                    NodeList textNList1 = firstNameElement.getChildNodes();}

Caused by: java.lang.ClassCastException

ClassCastException

@莫迪 你好，想跟你请教个问题：

我在Eclipse下配置的struts1.3的小工程，在表单提交后就出现下面的错误，很是费解，该导入的包也都有，包的继承关系也没弄错，为什么就不能cast ActionForm呢？非常感谢，麻烦您了！！

package prj10;
import org.apache.struts.action.ActionForm;
public class LoginForm extends ActionForm{
private static final long serialVersionUID = 1L;
private String account;
private String password;

public String getAccount(){
return account;
}
public void setAccount(String account){
this.account = account;

}

public String getPassword(){
return password;
}
public void setPassword(String password){
this.password = password;

}



}

五月 08, 2014 10:46:56 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [action] in context with path [/bbs] threw exception [java.lang.ClassCastException: prj10.LoginForm cannot be cast to org.apache.struts.action.Action] with root cause
java.lang.ClassCastException: prj10.LoginForm cannot be cast to org.apache.struts.action.Action
at org.apache.struts.chain.commands.servlet.CreateAction.createAction(CreateAction.java:98)
at org.apache.struts.chain.commands.servlet.CreateAction.getAction(CreateAction.java:68)
at org.apache.struts.chain.commands.AbstractCreateAction.execute(AbstractCreateAction.java:91)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
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.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:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1822)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)

ClassCastException $ Proxy无法转换为使用aop

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"
xmlns:context="http://www.springframework.org/schema/context/spring-context-2.5.xsd"
xmlns:flow="http://www.springframework.org/schema/webflow-config/spring-webflow-config- 1.0.xsd"
xmlns:jm s="http://www.springframework.org/schema/jms/spring-jms-2.5.xsd"
xmlns:jee="http://www.springframework.org/schema/jee/spring-jee-2.5.xsd"
xmlns:lang="http://www.springframework.org/schema/lang/spring-lang-2.5.xsd"
xmlns:osgi="http://www.springframework.org/schema/osgi/spring-osgi.xsd"
xmlns:tx="http://www.springframework.org/schema/tx/spring-tx-2.5.xsd"
xmlns:util="http://www.springframework.org/schema/util/spring-util-2.5.xsd"
xmlns:p="http://www.springframework.org/schema/p"

xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd     http://www.springframework.org/schema/aop/spring-aop-2.5.xsd/spring-spring-aop-2.5.xsd-2.5.xsd
http://www.springframework.org/schema/context/spring-context-2.5.xsd     http://www.springframework.org/schema/context/spring-context-2.5.xsd/spring-spring-context-2.5.xsd-2.5.xsd
http://www.springframework.org/schema/webflow-config/spring-webflow-config-1.0.xsd     http://www.springframework.org/schema/webflow-config/spring-webflow-config-1.0.xsd/spring-spring-webflow-config-1.0.xsd-2.5.xsd
http://www.springframework.org/schema/jms/spring-jms-2.5.xsd     http://www.springframework.org/schema/jms/spring-jms-2.5.xsd/spring-spring-jms-2.5.xsd-2.5.xsd
http://www.springframework.org/schema/jee/spring-jee-2.5.xsd     http://www.springframework.org/schema/jee/spring-jee-2.5.xsd/spring-spring-jee-2.5.xsd-2.5.xsd
http://www.springframework.org/schema/lang/spring-lang-2.5.xsd     http://www.springframework.org/schema/lang/spring-lang-2.5.xsd/spring-spring-lang-2.5.xsd-2.5.xsd
http://www.springframework.org/schema/osgi/spring-osgi.xsd     http://www.springframework.org/schema/osgi/spring-osgi.xsd/spring-spring-osgi.xsd-2.5.xsd
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd     http://www.springframework.org/schema/tx/spring-tx-2.5.xsd/spring-spring-tx-2.5.xsd-2.5.xsd
http://www.springframework.org/schema/util/spring-util-2.5.xsd     http://www.springframework.org/schema/util/spring-util-2.5.xsd/spring-spring-util-2.5.xsd-2.5.xsd
">
<bean id="sale01">
<property name="itemId" value="0001"/>
<property name="lifeTime" value="15"/>
</bean>
</beans>

    ApplicationContext context = new FileSystemXmlApplicationContext(SalesManager.getSalesSourceFile());
    SaleRoom saleRoom;
    List<String> salesNames = new LinkedList<String>();
    List<SaleRoom> allSales = new LinkedList<SaleRoom>();

    // Get all sales id's for beans
    NodeList salesNodeList = salesDoc.getElementsByTagName("bean");

    for (int i = 0; i < salesNodeList.getLength(); i++) {
        Node nNode = salesNodeList.item(i);
        salesNames.add(((Element) nNode).getAttribute("id").toString());
    }

    for (String saleName : salesNames) {
        if(saleName.contains("sale")) {
            saleRoom = (SaleRoom) context.getBean(saleName);
            allSales.add(saleRoom);
        }
    }

    return allSales;

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
           xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns:aop="http://www.springframework.org/schema/aop"
           xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">

    <aop:aspectj-autoproxy>
        <aop:include name="logSettersCalls"/>
    </aop:aspectj-autoproxy>
    <bean id="logSettersCalls"/>

    <bean id="sale01">
        <constructor-arg index="0" type="int" value="0001"/>
        <constructor-arg index="1" type="int" value="15"/>
    </bean>
</beans>

@Aspect
public class LogSettersCalls {
   @Pointcut("execution(void set*(*))")
    public void setMethod() {}

    @Before("setMethod()")
    public void logSetterCall(JoinPoint theJoinPoint) {
        String methodName = theJoinPoint.getSignature().getName();
        Object newValue = theJoinPoint.getArgs()[0];
        Object theObject = theJoinPoint.getTarget();
        System.out.println("The method " + methodName + " is called on object " 
                + theObject + " with the value " + newValue);
    }
}

ClassCastException 异常

我在使用 JedisCluster 的实例，调用它的方法 getClusterNodes () 然后给一个 JedisPool 赋值的时候，提示我一个 ClassCastException, 具体的栈信息如下:

java.lang.ClassCastException: redis.clients.jedis.JedisPool cannot be cast to redis.clients.jedis.JedisPool
	at com.redis.monitor.redis.impl.RedisServiceImpl.ping(RedisServiceImpl.java:537)
	at com.redis.monitor.manager.impl.RedisManagerImpl.ping(RedisManagerImpl.java:190)
	at com.redis.monitor.web.interceptor.ServerInteceptor.preHandle(ServerInteceptor.java:93)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:891)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:827)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:693)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:533)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1351)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1322)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:473)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:514)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:920)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:403)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:184)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:856)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:114)
	at org.eclipse.jetty.server.Server.handle(Server.java:352)
	at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:596)
	at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1049)
	at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:590)
	at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:212)
	at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:426)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:510)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint.access$000(SelectChannelEndPoint.java:34)
	at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:40)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:450)
	at java.lang.Thread.run(Thread.java:722)

public String ping(Redis redis) {
	Jedis jedis = null;
	JedisPool jp = null;
	boolean broken = false;
	try {
		Map<String, JedisPool> poolMap = redis.getJedisCluster().getClusterNodes();
		for(JedisPool jp1:poolMap.values()){
			jedis = jp1.getResource();
			jedis.ping();
		}
	} catch (JedisConnectionException jce) {
		broken = true;
	} catch (Exception e) {
		e.printStackTrace();
	} 
	return "";
}

在 for 循环赋值给 JedisPool 的时候会出错.

大家帮忙看看是怎么回事

关于将节点转换为提供ClassCastException的元素和节点怎么转换的问题我们已经讲解完毕，感谢您的阅读，如果还想了解更多关于Caused by: java.lang.ClassCastException、ClassCastException、ClassCastException $ Proxy无法转换为使用aop、ClassCastException 异常等相关内容，可以在本站寻找。