20170918_chr_calActionchr Struts2实现简易计算器

来源：互联网发布：仓实而知礼节编辑：程序博客网时间：2024/05/29 19:28

Struts2实现简易计算器

/20170918_chr_calActionchr/src/nuc/sw/action/CalAction.java

package nuc.sw.action;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class CalAction extends ActionSupport {    private float num1;    private float num2;    private String op;    public float getNum1() {        return num1;    }    public void setNum1(float num1) {        this.num1 = num1;    }    public float getNum2() {        return num2;    }    public void setNum2(float num2) {        this.num2 = num2;    }    public String getOp() {        return op;    }    public void setOp(String op) {        this.op = op;    }    //业务处理方法    public String calculater(){        float result=0;        switch(op.charAt(0)){        case '+':result=num1+num2;break;        case '-':result=num1-num2;break;        case '*':result=num1*num2;break;        case '/':result=num1/num2;        }        ActionContext.getContext().put("result", result);        return "calOK";    }}

/20170918_chr_calActionchr/src/struts.xml

<struts>    <!-- Add packages here -->    <package name="Cal" extends="struts-default" namespace="/">        <action name="CalAction" class="nuc.sw.action.CalAction" method="calculater">           <result name="calOK">               /Cal.jsp           </result>        </action>    </package></struts>

/20170918_chr_calActionchr/WebContent/Cal.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!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></head><body>  <form action="CalAction"  method="get">         操作数1：<input type="text" name="num1" value="${requestScope.num1}"><br>         操作符号：<input type="radio" name="op" value="+"${requestScope.op=="+"?"checked":""}>+            <input type="radio" name="op" value="-" ${requestScope.op=="-"?"checked":""}>-            <input type="radio" name="op" value="*" ${requestScope.op=="*"?"checked":""}>*            <input type="radio" name="op" value="/" ${requestScope.op=="/"?"checked":""}>/<br>         操作数2：<input type="text" name="num2" value=" ${requestScope.num2 }"><br>         <input type="submit" value="计算"><br>         结果：   <input type="text" value="${requestScope.result} ">  </form></body></html>

阅读全文

0 0