今天刚学struts，交作业的题目，步骤打乱了，因为删掉了很多无关计算器的内容。
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name></display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- 第一步：配置filter，为启用Struts做准备 -->
<filter>
<filter-name>StrutsPrepareAndExecuteFilter</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>StrutsPrepareAndExecuteFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
<!-- 第4步：建立struts.xml文件 ，配置struts框架的所需内容-->
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<package name="helloPackage" extends="struts-default" namespace="/">
<action name="helloRequest" class="Ex1124.HelloAction" method="helloAction">
<result name="hellook" type="dispatcher">
/ok.jsp
</result>
</action>
<action name="indexRequest" class="Ex1124.ConfigAction" method="execute">
<result name="configok" type="dispatcher">
/index.jsp
</result>
</action>
</package>
<!-- 第9步：添加处理计算的package -->
<constant name="" value="2333"></constant>
<package name="calc" extends="struts-default" namespace="/">
<action name="calcexe" class="Ex1124.Calc" method="cal">
<!-- 特别注意：此处出现了两个错误，首先将method写错为类名，而不是方法名，
第二将class写成Ex1124/Calc，导致所有页面404 -->
<result name="calOK" type="dispatcher">
/cal.jsp
</result>
</action>
</package>
</struts>
package Ex1124;
import com.opensymphony.xwork2.ActionSupport;
//第8步：创建Calc，准备处理计算结果
public class Calc extends ActionSupport{
private String username;
private Integer num1;
private String opt;
private Integer num2;
private Integer result=0;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public Integer getNum1() {
return num1;
}
public void setNum1(Integer num1) {
this.num1 = num1;
}
public String getOpt() {
return opt;
}
public void setOpt(String opt) {
this.opt = opt;
}
public Integer getNum2() {
return num2;
}
public void setNum2(Integer num2) {
this.num2 = num2;
}
public Integer getResult() {
return result;
}
public void setResult(Integer result) {
this.result = result;
}
public String cal() throws Exception{
if(opt.equals("+")){
result=num1+num2;
}else if(opt.equals("-")){
result=num1-num2;
}else if(opt.equals("*")){
result=num1*num2;
}else if(opt.equals("/")){
result=num1/num2;
}
return "calOK";
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!-- 第10步：编写cal.jsp页面 -->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>计算器</title>
</head>
<body>
<!-- 获取文本域路径 -->
<form action=${pageContext.request.contextPath}/calcexe method="post">
<table border="2" align="center">
<tr>
<th>用户名</th>
<td><input type="text" name="username" value="${requestScope.username}"/></td>
</tr>
<tr>
<th>操作数一</th>
<td><input type="text" name="num1" value="${requestScope.num1}"/></td>
</tr>
<tr>
<th>运算符</th>
<td>
<input type="radio" name="opt" value="+" ${requestScope.opt=='+'?'checked':'checked' }/>+
<input type="radio" name="opt" value="-" ${requestScope.opt=='-'?'checked':'' }/>-
<input type="radio" name="opt" value="*" ${requestScope.opt=='*'?'checked':'' }/>*
<input type="radio" name="opt" value="/" ${requestScope.opt=='/'?'checked':'' }/>/
</td>
</tr>
<tr>
<th>操作数二</th>
<td><input type="text" name="num2" value="${requestScope.num2}"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="计算" action=""/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="text" name="result" value="${requestScope.result}"/></td>
</tr>
</table>
</form>
</body>
</html>
Comments 2 条评论
不错支持一下
@summer_last 谢谢