建立一个Java Web项目,提取最少运行Struts2应用的包集合(摘自Struts官方文档):
Install the Minimum Set of Libraries and Configuration Files
The following files are a minium requirement for your application.
| Filename | Description |
|---|---|
| struts2-core.jar | Framework library itself, found in distribution root directory |
| xwork.jar | XWork 2 library on which Struts 2 is built (version 2.0 or later) |
| ognl.jar | Object Graph Navigation Language (OGNL), the expression language used throughout the framework |
| freemarker.jar | All UI tag templates are written in Freemarker (also a good option for your own views) |
| commons-logging.jar | Commons logging, which the framework uses to support transparently logging to either Log4J or JDK 1.4+ |
| web.xml | Java web application configuration file that defines the filters (and other components) for your web application |
| struts.xml | Framework configuration file that defines the actions, results, and interceptors for your application |
If any Struts 2 Plugins are included, then other JARs may be needed too. For example, the optional Spring Plugin requires the Spring JARs to be present.
目标:实现一个简单的用户登录.
下面是实现源码:
一、先实现登录页面
<%--
登录页面
User: leizhimin
Date: 2008-3-14
Time: 15:45:52
To change this template use File | Settings | File Templates.
--%>
< %@ page contentType ="text/html;charset=GBK" language ="java" % >
< html >
< head > < title >登录页面 </title> </head>
< body >
< form action ="Login.action" method ="post" >
< table align ="center" >
< caption > < h3 >用户登录 </h3> </caption>
< tr >
< td >用户名: < input type ="text" name ="username" /> </td>
</tr>
< tr >
< td >密 码: < input type ="text" name ="password" /> </td>
</tr>
< tr align ="center" >
< td align ="center" >
< input type ="submit" value ="登录" />
< input type ="reset" value ="重填" />
</td>
</tr>
</table>
</form>
</body>
</html>
登录页面
User: leizhimin
Date: 2008-3-14
Time: 15:45:52
To change this template use File | Settings | File Templates.
--%>
< %@ page contentType ="text/html;charset=GBK" language ="java" % >
< html >
< head > < title >登录页面 </title> </head>
< body >
< form action ="Login.action" method ="post" >
< table align ="center" >
< caption > < h3 >用户登录 </h3> </caption>
< tr >
< td >用户名: < input type ="text" name ="username" /> </td>
</tr>
< tr >
< td >密 码: < input type ="text" name ="password" /> </td>
</tr>
< tr align ="center" >
< td align ="center" >
< input type ="submit" value ="登录" />
< input type ="reset" value ="重填" />
</td>
</tr>
</table>
</form>
</body>
</html>
二、实现处理页面的Action
package stu;
/**
* 处理用户请求的Action
* File: LoginAction.java
* User: leizhimin
* Date: 2008-3-14 15:59:07
*/
public class LoginAction {
private String username;
private String password;
/**
* 处理用户请求的execute方法
* 因为Struts2的拦截机制,他们负责解析用户的请求参数,并将请求参数赋给Action对应的属性
*
* @return 当用户名为aaa并且密码为123时,返回success,否则,返回error.
* @throws Exception
*/
public String execute() throws Exception {
//当用户名为aaa并且密码为123时,返回success,否则,返回error.
if (getUsername().equals( "aaa") && getPassword().equals( "123")) {
return "success";
} else {
return "error";
}
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
/**
* 处理用户请求的Action
* File: LoginAction.java
* User: leizhimin
* Date: 2008-3-14 15:59:07
*/
public class LoginAction {
private String username;
private String password;
/**
* 处理用户请求的execute方法
* 因为Struts2的拦截机制,他们负责解析用户的请求参数,并将请求参数赋给Action对应的属性
*
* @return 当用户名为aaa并且密码为123时,返回success,否则,返回error.
* @throws Exception
*/
public String execute() throws Exception {
//当用户名为aaa并且密码为123时,返回success,否则,返回error.
if (getUsername().equals( "aaa") && getPassword().equals( "123")) {
return "success";
} else {
return "error";
}
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
三、配置Web.xml
<?
xml
version
="1.0"
encoding
="GBK"
?>
< web-app 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 [url]http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd[/url]" >
< display-name >Struts Blank </ display-name >
<!-- 定义Struts2的FilterDispatcher的Filter-->
< filter >
<!-- 定义核心Filter的名字-->
< filter-name >struts2 </ filter-name >
<!-- 定义核心Filter的实现类-->
< filter-class >org.apache.struts2.dispatcher.FilterDispatcher </ filter-class >
</ filter >
<!-- FilterDispatcher用来初始化Struts2并且处理所有的Web请求-->
< filter-mapping >
< filter-name >struts2 </ filter-name >
< url-pattern >/* </ url-pattern >
</ filter-mapping >
< welcome-file-list >
< welcome-file >/login.jsp </ welcome-file >
</ welcome-file-list >
</ web-app >
< web-app 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 [url]http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd[/url]" >
< display-name >Struts Blank </ display-name >
<!-- 定义Struts2的FilterDispatcher的Filter-->
< filter >
<!-- 定义核心Filter的名字-->
< filter-name >struts2 </ filter-name >
<!-- 定义核心Filter的实现类-->
< filter-class >org.apache.struts2.dispatcher.FilterDispatcher </ filter-class >
</ filter >
<!-- FilterDispatcher用来初始化Struts2并且处理所有的Web请求-->
< filter-mapping >
< filter-name >struts2 </ filter-name >
< url-pattern >/* </ url-pattern >
</ filter-mapping >
< welcome-file-list >
< welcome-file >/login.jsp </ welcome-file >
</ welcome-file-list >
</ web-app >
四、配置Action处理结果和资源资源之间的映射关系
注意：此文件打包后位于WEB-INF/classes/目录下面，或者放入classpath。
<?
xml
version
="1.0"
encoding
="GBK"
?>
< web-app 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 [url]http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd[/url]" >
< display-name >Struts Blank </ display-name >
<!-- 定义Struts2的FilterDispatcher的Filter-->
< filter >
<!-- 定义核心Filter的名字-->
< filter-name >struts2 </ filter-name >
<!-- 定义核心Filter的实现类-->
< filter-class >org.apache.struts2.dispatcher.FilterDispatcher </ filter-class >
</ filter >
<!-- FilterDispatcher用来初始化Struts2并且处理所有的Web请求-->
< filter-mapping >
< filter-name >struts2 </ filter-name >
< url-pattern >/* </ url-pattern >
</ filter-mapping >
< welcome-file-list >
< welcome-file >/login.jsp </ welcome-file >
</ welcome-file-list >
</ web-app >
< web-app 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 [url]http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd[/url]" >
< display-name >Struts Blank </ display-name >
<!-- 定义Struts2的FilterDispatcher的Filter-->
< filter >
<!-- 定义核心Filter的名字-->
< filter-name >struts2 </ filter-name >
<!-- 定义核心Filter的实现类-->
< filter-class >org.apache.struts2.dispatcher.FilterDispatcher </ filter-class >
</ filter >
<!-- FilterDispatcher用来初始化Struts2并且处理所有的Web请求-->
< filter-mapping >
< filter-name >struts2 </ filter-name >
< url-pattern >/* </ url-pattern >
</ filter-mapping >
< welcome-file-list >
< welcome-file >/login.jsp </ welcome-file >
</ welcome-file-list >
</ web-app >
五、增加登录成功和失败页面
<
%@ page
contentType
="text/html;charset=GBK"
language
="java" %
>
< html >
< head > < title >登录成功页面 </title> </head>
< body >
登录成功!
</body>
</html>
< html >
< head > < title >登录成功页面 </title> </head>
< body >
登录成功!
</body>
</html>
<
%@ page
contentType
="text/html;charset=GBK"
language
="java" %
>
< html >
< head > < title >登录失败 </title> </head>
< body >
登录失败!
</body>
</html>
< html >
< head > < title >登录失败 </title> </head>
< body >
登录失败!
</body>
</html>
六、打包并部署到tomcat，运行如下图：
本文转自 leizhimin 51CTO博客，原文链接：http://blog.51cto.com/lavasoft/65773，如需转载请自行联系原作者
