1、創建工程項目:
File->new->others,打開新建嚮導對話框,在樹中找到web->Dynamic Web Project,選中,點擊next按鈕。在projects name中輸入dodotest,點擊next。保持默認設置,點擊finished。這時,我們在eclipse中會看到新建的工程dodotest,創建完成。
2、修改web.xml文件:
內容如下
- <?xml version="1.0" encoding="UTF-8"?>
- <web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
- <display-name>
- dodotest</display-name>
- <filter>
- <filter-name>struts2</filter-name>
- <filter-class>
- org.apache.struts2.dispatcher.FilterDispatcher
- </filter-class>
- </filter>
- <filter-mapping>
- <filter-name>struts2</filter-name>
- <url-pattern>/*</url-pattern>
- </filter-mapping>
- <welcome-file-list>
- <welcome-file>index.jsp</welcome-file>
- </welcome-file-list>
- </web-app>
<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>
dodotest</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.FilterDispatcher
</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
3、編寫類代碼:
3.1 HelloWorld.java
先寫一個父類
- package com.yeepal.test;
- public class HelloWorld {
- private String words;
- public String getWords() {
- return words;
- }
- public void setWords(String words) {
- this.words = words;
- }
- }
package com.yeepal.test;
public class HelloWorld {
private String words;
public String getWords() {
return words;
}
public void setWords(String words) {
this.words = words;
}
}
3.2 HelloAction.java
再寫一個子類
- package com.yeepal.test;
- import com.opensymphony.xwork2.ActionSupport;
- import com.yeepal.test.HelloWorld;
- public class HelloAction extends ActionSupport {
- private static final long serialVersionUID = 1L;
- private HelloWorld helloWorld;
- public HelloWorld getHelloWorld() {
- return helloWorld;
- }
- public void setHelloWorld(HelloWorld helloWorld) {
- this.helloWorld = helloWorld;
- }
- @Override
- public String execute() {
- return SUCCESS;
- }
- }
package com.yeepal.test;
import com.opensymphony.xwork2.ActionSupport;
import com.yeepal.test.HelloWorld;
public class HelloAction extends ActionSupport {
private static final long serialVersionUID = 1L;
private HelloWorld helloWorld;
public HelloWorld getHelloWorld() {
return helloWorld;
}
public void setHelloWorld(HelloWorld helloWorld) {
this.helloWorld = helloWorld;
}
@Override
public String execute() {
return SUCCESS;
}
}
注:這裏分成兩個類來寫,是爲了順便實踐一下類的繼承,而不是必須的,只寫一個類也是可以的。
4、加載相應的包:
寫完上面的類,會發現有些錯誤,主要是因爲我們這裏使用了STRUTS及一些相應的lib文件,而這些文件我們還沒添加到項目裏,所以下一步我們就來添加這些lib,本次要使用到的lib文件包括4個,分別是:struts2-core-2.0.9.jar、freemarker-2.3.8.jar、 ognl-2.6.11.jar、xwork-2.0.4.jar,千萬不要一下子就把所有的struts裏面的lib文件全部拿過來用,反而會出錯。
把這寫文件放到 dodotest\WebContent\WEB-INF\lib 目錄下,在eclipse中右擊項目名稱,選擇properties,在新的屬性對話框裏,選擇java Build Path,然後再右側的對話框裏選擇Libraries標籤,然後是右邊的“Add External JARs…,找到剛纔那4個lib文件,全選,再點“打開”,這樣,這4個lib文件就被添加到了項目中,這時候你會發現剛纔的那些錯誤消失了。
5、現在我們來寫struts.xml文件:
在src目錄下新建XML文件,命名爲struts.xml,內容如下:
- <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
- "http://struts.apache.org/dtds/struts-2.0.dtd">
- <struts>
- <include file="struts-default.xml" />
- <package name="default" extends="struts-default">
- <action name="hello"
- class="com.yeepal.test.HelloAction">
- <result name="success">success.jsp</result>
- <result name="input">index.jsp</result>
- </action>
- </package>
- </struts>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<include file="struts-default.xml" />
<package name="default" extends="struts-default">
<action name="hello"
class="com.yeepal.test.HelloAction">
<result name="success">success.jsp</result>
<result name="input">index.jsp</result>
</action>
</package>
</struts>
6、編寫JSP文件:
下面我們來寫兩個JSP文件,新建JSP文件,默認情況下新建的文件路徑是WebContent下,不需要修改。
- <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
- <title>你好,世界</title>
- <meta http-equiv="pragma" content="no-cache">
- <meta http-equiv="cache-control" content="no-cache">
- <meta http-equiv="expires" content="0">
- <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
- <meta http-equiv="description" content="This is my page">
- </head>
- <body>
- <form action="hello.action" method="post">
- <fieldset><legend>Struts2入門實例</legend>
- <p><label>請輸入你想說的話:</label>
- <input type="text" name="helloWorld.words" value="試試看!" /></p>
- <p><input type="submit" value="提交" /></p>
- </fieldset>
- </form>
- </body>
- </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>你好,世界</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">