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编写一个简单的javaEE加法程序

一 、javaEE的安装及环境配置

工具:

32位系统准备eclipse-jee-mars-2-win32.zip,64位系统准备eclipse-jee-mars-2-win32-x86_64.zip

jdk1.7

maven3.3.9.rar

m2.rar

环境配置:

1. 设置eclipse的配置文件eclipse.ini,修改虚拟机路径,在-vmargs之前添加

-vm E:\jee\jdk1.7\bin\javaw.exe

注意:用写字板打开修改,-vm有的电脑要换行,有的电脑不用换行

2. 启动eclipse,设置maven

在菜单window-prefrences中搜索“maven”,打开“installations”选项进行设置

3.设置maven本地仓库路径

Maven本地仓库默认在C:\Users\用户名\.m2下,C盘空间通常很紧张,需要移到其它盘,步骤如下:

(1)修改Maven根目录(E:\jee\maven-3.3.9)下的 conf文件夹内的setting.xml文件,新增一行:

<localRepository>e:\jee\.m2\repository</localRepository>

(2)修改Eclipse中的maven配置

在菜单window--prefrences中,打开“maven--User settings”,如下图:

 

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先点“User settings”设置项的“Browse…”按钮,选择maven的配置文件,再点下面的“Reindex”按钮更新索引。

 二、编写一个简单的加法程序

新建maven项目:

1.选择菜单file—new—maven project,勾选“Create a &simple project (skip archetype selection)"

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2.新建maven项目,设置项目属性如下 

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加法程序关键代码

AddAction.java

package com.cqvie.action;

import com.opensymphony.xwork2.ActionSupport;

public class AddrAction extends ActionSupport {

    private String n1;
    private String n2;
    private String n;
    

    public String getN1() {
        return n1;
    }


    public void setN1(String n1) {
        this.n1 = n1;
    }


    public String getN2() {
        return n2;
    }


    public void setN2(String n2) {
        this.n2 = n2;
    }


    public String getN() {
        return n;
    }


    public void setN(String n) {
        this.n = n;
    }


    /**
     * 鐧诲綍
     * @return
     */
    public String add() {
        n=n1+n2;
            return "n";
    }
}

add.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>登录界面</title>
    </head>
    
    <body>
        <form action="add" method="post">
            name:<input type="text" name="n1" />
            name:<input type="text" name="n2" />
            
            <input type="submit" valuehttp://www.mamicode.com/="=" />
        </form>
    </body>
</html>

add_success.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%-- <%@ taglib prefix="s" uri="/struts-tags" %> --%>
<!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>登录成功</title>
    </head>
    
    <body>
        <%-- <s:form action="login" namespace="/" method="post">
            <s:textfield name="name" label="name"></s:textfield>
            <s:password name="password" label="password"></s:password>
            
            <s:submit value="http://www.mamicode.com/Login"></s:submit>
        </s:form> --%>
        <s:property value="http://www.mamicode.com/n"/>
    </body>
</html>

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>
    <constant name="struts.i18n.encoding" value="http://www.mamicode.com/utf-8"></constant>
    <constant name="struts.multipart.maxSize" value="http://www.mamicode.com/20971520" />
    <constant name="struts.devMode" value="http://www.mamicode.com/true" />

    <package name="p_user" namespace="/" extends="struts-default">
    
        <action name="add" class="com.cqvie.action.AddAction"
            method="add">
            <result name="success">
                /add_success.jsp
            </result>
                    
        </action>
        
    </package>

</struts>  

index.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>登录</title>
</head>
<body>
    <a href="http://www.mamicode.com/login">去登录</a>
</body>
</html>

3.运行项目

选择菜单“Run”—“Run Configurations”,设置如下图:

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4.在浏览器中查看结果

地址栏输入“http://localhost:9527/add/”查看结果

 

编写一个简单的javaEE加法程序