Struts 2輸入結(jié)果：它是如何工作的？轉(zhuǎn)換/驗(yàn)證錯(cuò)誤是如何處理的？主要問題工作流程應(yīng)該是這樣的：如果輸入一個(gè)字符串而不是數(shù)字，首先它應(yīng)該通過一個(gè)異常攔截器，而當(dāng)通過param攔截器時(shí)，當(dāng)轉(zhuǎn)換為int類型時(shí)，它將不能使用Integer.parseInt就會(huì)出現(xiàn)異常，難道不應(yīng)該出現(xiàn)這樣的異常嗎？NumberFormatException)被推入價(jià)值棧？為什么它不顯示NumberFormatException即使結(jié)果不應(yīng)該被打印出來，也要顯示結(jié)果？邊問題每當(dāng)我在表格中加一個(gè)字母表，它就變成零.？為什么？index.jsp<%@ taglib uri="/struts-tags" prefix="s"%><s:form action="divide">     <s:textfield name="number1" label="number1"/>     <s:textfield name="number2" label="number2"/>     <s:submit value="divide"/></s:form>divide.javapackage actions;public class divide {     int number1,number2,result;     public String execute() throws Exception     {         result=number1/number2;         return "success";     }     public int getNumber1() {         return number1;     }     public void setNumber1(int number1) {         this.number1 = number1;     }     public int getNumber2() {         return number2;     }     public void setNumber2(int number2) {         this.number2 = number2;     }     public int getResult() {         return result;     }}Result.jsp<%@taglib uri="/struts-tags" prefix="s" %><b>     the result of division is    <s:property value="result"/></b><jsp:include page="index.jsp"></jsp:include>處理程序jsp<%@taglib uri="/struts-tags" prefix="s"%><b>     following exception occured during the processing    <s:property value="exception"/></b><jsp:include page="index.jsp"/>struts.xml<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC      "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"     "http://struts.apache.org/dtds/struts-2.0.dtd">     <struts>         <package name="yo" extends="struts-default">             <action name="divide" class="actions.divide">                 <exception-mapping result="error" exception="Exception"/>                 <result name="success">/result.jsp</result>                 <result name="error">/handler.jsp</result>             </action>         </package>     </struts>