出现java.lang.NoSuchMethodError:不能getDataSource，麻烦大伙给看看的，急！急！

Question

012-3-12 23:30:05 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet action threw exception
java.lang.NoSuchMethodError: com.wsy.struts.action.IndexAction.getDataSource(Ljavax/servlet/http/HttpServletRequest;Ljava/lang/String;)Ljavax/sql/DataSource;
at com.wsy.struts.action.IndexAction.execute(IndexAction.java:22)
at org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:53)
at org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:64)
at org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:48)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:304)
at org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:190)
at org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:280)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1858)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:446)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.java:709)
at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.java:680)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:62)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)

Answer 1

IndexAction的代码贴出来，应该是这个action里面你调用了没有的方法。导致的错误

Answer 2

com.wsy.struts.action.IndexAction.getDataSource(Ljavax/servlet/http/HttpServletRequest;Ljava/lang/String;)Ljavax/sql/DataSource;
是不是 getDataSource没有对应的方法啊确定有 getDataSource(HttpServletRequest req, String str)  ？

Answer 3

IndexAction的代码如下所示的，我是个菜鸟级的，参考的源代码做毕业设计的，但都搭配好了，就是老报错，改来改都不对，还望各位多指点的，让我顺利完成毕业设计的，在此谢了
package com.wsy.struts.action;import java.util.List;import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import javax.sql.DataSource;import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessages;import com.wsy.struts.bean.ForumBean;public class IndexAction extends Action {
public ActionMessages message; public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
message = new ActionMessages();
DataSource datasource = getDataSource(request,"dataSources");//取struts配置的数据源
HttpSession session=request.getSession();
ForumBean f=new ForumBean();
List list=f.getRecord(datasource);//取出论坛信息表中全部内容
int ztcount=ForumBean.getCount(datasource);//取出主题总数
int ztAndResponseCount=f.getZtAndResponseCount(datasource);//取总共帖子数
int todaycount=f.getTodayResponseCount(datasource);
session.setAttribute("list", list);
session.setAttribute("ztcount", ztcount+"");
session.setAttribute("ztAndResponseCount", ztAndResponseCount+"");
session.setAttribute("todaycount", todaycount+"");
return mapping.getInputForward();


}


}

Answer 4

ActionForward  这个类里有定义 getDataSource（） 这个方法吗?