java.lang.NoSuchMethodException 错误

最新推荐文章于 2022-08-17 16:38:06 发布

weixin_30652897

最新推荐文章于 2022-08-17 16:38:06 发布

阅读量229

点赞数

CC 4.0 BY-SA版权

文章标签： java ui 数据库

原文链接：http://www.cnblogs.com/tenney/p/4039203.html

本文探讨并解决了使用Struts2框架时遇到的Action方法名与JSP中提交路径不一致导致的运行错误。通过分析错误堆栈跟踪信息，最终定位到问题源自JSP文件中请求路径与Action类中方法名不匹配。文章详细阐述了如何修正这一错误，确保两者路径的一致性，从而顺利执行更新操作。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

报错：

Stacktraces

java.lang.NoSuchMethodException: com.gssw.action.ProAction.update()

    java.lang.Class.getMethod(Class.java:1607)
    org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.getActionMethod(AnnotationValidationInterceptor.java:75)
    org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:47)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:133)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:207)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:190)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:243)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:100)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:141)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:142)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:166)
    com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:176)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:190)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:187)
    com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:248)
    org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52)
    org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:485)
    org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77)
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91)
    org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
    org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:877)
    org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:594)
    org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1675)
    java.lang.Thread.run(Thread.java:662)
action代码

package com.gssw.action;

import java.util.List;

 

import com.gssw.dao.ProDao;
import com.gssw.dao.ProTypeDao;

import com.gssw.pojo.Product;
import com.gssw.pojo.ProductType;
import com.gssw.util.Pager;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

public class ProAction extends ActionSupport implements ModelDriven<Product>{


private static final long serialVersionUID = 1L;
private Product pro=new Product();
private List<ProductType> proType;
private List<Product> pros;
private String op;
private Pager<Product> proPager=new Pager<Product>();
private String pno;
@Override

public Product getModel() {

return pro;
}

/*	public ProAction() {
proType=pto.read();
}
*/
//private UserDao udo;
private ProDao pdo;
private ProTypeDao pto;

public String list() throws Exception{
proType=pto.read();	
//提供总记录数的
proPager.setRecordCount(pdo.total());
proPager.setPageSize(5);
proPager.setPageNo(pno);
pros=pdo.read(proPager.getPageNo(), proPager.getPageSize(), "proName desc,proId desc");
proPager.setData(pros);
proPager.setUrl("pro_list.action");

return "list";
}

public String create(){
op="create";

return "input";
}

public String updata(){
op="updata";
//这里要读一下数据库页面只是返回了一个id的值
pro=pdo.read(pro.getProId());
return "input";
}
public String createOrUpdata() throws Exception{
System.out.println(pro.toString());
if("create".equals(op)){

pdo.create(pro);
}
else if("updata".equals(op)){
pdo.update(pro);	
}
return list();
}
public String delete() throws Exception{
pdo.delete((int) pro.getProId());
return list();
}
//set();get();
public List<ProductType> getProType() {
return proType;
}

public void setProType(List<ProductType> proType) {
this.proType = proType;
}

public List<Product> getPros() {
return pros;
}

public void setPros(List<Product> pros) {
this.pros = pros;
}

public String getOp() {
return op;
}

public void setOp(String op) {
this.op = op;
}


public String getPno() {
return pno;
}

public void setPno(String pno) {
this.pno = pno;
}

public Product getPro() {
return pro;
}

public Pager<Product> getProPager() {
return proPager;
}

public void setProPager(Pager<Product> proPager) {
this.proPager = proPager;
}


/* DI */

public void setPdo(ProDao pdo) {
this.pdo = pdo;
}

public void setPto(ProTypeDao pto) {
this.pto = pto;
}
}

　　struts.xml

<struts>
    <constant name="struts.devMode" value="true" />
    <!-- 使用最简单主题，防止生成一些不需要的标签 -->
    <constant name="struts.ui.theme" value="simple" />
    
    <!-- struts2不拦截kindeditor在线编辑器中的jsp -->
	<constant name="struts.action.excludePattern" value="/kindeditor/jsp/.*" />
	
	<!-- spring插件整合Struts2 -->
	<constant name="struts.objectFactory" value="org.apache.struts2.spring.StrutsSpringObjectFactory" />
   	
    <package name="default" namespace="/" extends="struts-default">

       <default-action-ref name="default" />
           
    	<global-results>
    		<result name="login" type="redirect">/admin/login.jsp</result>
    		<result name="index">/index.jsp</result>
    		
    	</global-results>
    	
      	<action name="log*" class="logopaction" method="log{1}">
       		<result name="reindex" type="redirect">/admin/pro_list.action</result>
       		<result name="input">/admin/login.jsp</result>
       	</action>
       	<action name="pro_*" class="proaction" method="{1}">
    		<result name="list">/admin/pages/dept/list.jsp</result>
    		<result name="input">/admin/pages/dept/${op}.jsp</result>
    	</action>
       	
    	<action name="default">
    		<result type="redirect">/admin/login.jsp</result>
    	</action>
    	
    </package>

</struts>

　　update.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style type="text/css">
    #error { color: red; }
</style>
</head>
<body>
    <div id="content">
        <h1 class="title">修改产品</h1>
        <div id="error">
            <c:forEach items="${errors }" var="error">
                <li>${error.value[0] }</li>
            </c:forEach>
        </div>
        <div id="input">
            <form method="post" action="pro_createOrUpdate.action">
                <input type="hidden" name="op" value="update">
                <input type="hidden" name="proId" value="${pro.proId }">
                <ul>
                    <li>
                        <label>proName</label>
                        <input type="text" name="proName" value="${pro.proName }">
                    </li>
                    <li>
                        <label>proPrice</label>
                        <input type="text" name="proPrice" value="${pro.proPrice }">
                    </li>
                    <li>
                        <label>proNum</label>
                        <input type="text" name="proNum" value="${pro.proNum }">
                    </li>
                    
                    <li>
                        <input type="submit" value="保存">
                        <input type="button" value="取消" onclick="location.href='pro_list.action'">
                    </li>
                </ul>
            </form>
        </div>
    </div>
    
</body>
</html>

错误最终找到了是jsp文件中提交的地址和对应的action中的方法名有出入 ~还是要细心啊

转载于:https://www.cnblogs.com/tenney/p/4039203.html