功能描述：一个用户注册页面register.jsp，用户可以在这个页面里输入用户注册的基本信息（例如：姓名、密码、Email等），输入完成提交表单，执行用户注册的Action，执行成功返回成功提示的页面（register-result.jsp）并将注册的信息输出。
模型：User.java
控制：RegisterAction.java
视图：register.jsp、register-result.jsp
配置：xwork.xml
User.java
package register;
public class User {
private String username;
private String password;
private String email;
private int age;
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
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;
}
public String toString(){
return "username=" + username
+ ";password=" + password
+ ";email=" + email
+ ";age=" + age;
}
}
RegisterAction.java
package example.register;
import com.opensymphony.xwork.Action;
import java.sql.*;
import register.User;
public class RegisterAction implements Action{
private User user = new User();
public User getUser(){
return this.user;
}
public String execute(){
System.out.println("Start execute......"
;
System.out.println("User="+user);
Connection conn = null;
Statement stmt = null;
try{ //向数据库中添加用户
Class.forName("com.mysql.jdbc.Driver"
;
String url = "jdbc:mysql://localhost/test?user=root&password=root&useUnicode=true&characterEncoding=GBK";
conn = DriverManager.getConnection(url);
stmt = conn.createStatement();
StringBuffer sb = new StringBuffer();
sb.append("INSERT INTO usertable VALUES('"
;
sb.append(user.getUsername());
sb.append("','"
;
sb.append(user.getPassword());
sb.append("','"
;
sb.append(user.getEmail());
sb.append("',"
;
sb.append(user.getAge());
sb.append("
"
;
stmt.executeUpdate(sb.toString());
}catch(Exception e1){
e1.printStackTrace();
}finally{
try{
if (stmt != null)
stmt.close();
if (conn != null)
conn.close();
}catch(Exception e2){
e2.printStackTrace();
}
}
return SUCCESS;
}
}
register.jsp
<title>Register Example</title>
<table border=0 width=97>
<tr><td align="left">
<form name="register" action="register.action" method="post">
Username:<input type="text" name="user.username"><br>
Password:<input type="text" name="user.password"><br>
Email:<input type="text" name="user.email"><br>
Age:<input type="text" name="user.age"><br>
<input type="submit" name="Submit"><br>
</form>
</td></tr>
</table>
register-result.jsp
<%@ taglib prefix="ww" uri="webwork" %>
<title>Register result</title>
<table border=0 width=97>
<tr>
<td align="left">
Congratulation,your register success!<p>
Username:<ww
roperty value="user.username"/><br>
Password:<ww
roperty value="user.password"/><br>
Email:<ww
roperty value="user.email"/><br>
Age:<ww
roperty value="user.age"/><br>
</td>
</tr>
</table>
web.xml
<?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>
TestRegister</display-name>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>webwork</servlet-name>
<servlet-class>com.opensymphony.webwork.dispatcher.ServletDispatcher</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>webwork</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<taglib>
<taglib-uri>webwork</taglib-uri>
<taglib-location>/WEB-INF/lib/webwork-2.2.1.jar</taglib-location>
</taglib>
</web-app>
xwork.xml
<!DOCTYPE xwork PUBLIC "-//OpenSymphony Group//XWork 1.0//EN"
"
http://www.opensymphony.com/xwork/xwork-1.0.dtd"><xwork>
<!-- Include webwork defaults (from WebWork-2.1 JAR). -->
<include file="webwork-default.xml" />
<!-- Configuration for the default package. -->
<package name="default" extends="webwork-default">
<!-- Default interceptor stack. -->
<default-interceptor-ref name="defaultStack" />
<action name="register" class="example.register.RegisterAction">
<result name="success" type="dispatcher">
<param name="location">register-result.jsp</param>
</result>
</action>
</package>
</xwork>
一些应该注意的地方：
１．Action里最好不要实现业务代码，Action的主要功能是提供从请求中取得参数的值，转化成相应的模型，再将模型传递给执行业务操作的对象，比如：将注册的用户信息存储到数据库中，由业务对象执行业务操作，再返回执行的结果．
２．执行<ww
roperty value="user.username"/>，Ognl会根据value的值＂user.username"去分别调用RegisterAction类的getUser()和User类的getUsername()方法，即：getUser().getUsername()，取得的数据就是前面注册页面输入的用户名。
３．xwork.xml中的<interceptor-ref name="params"/>,interceptor-ref标签设置这个Action用到的拦截器，"params"引用的是配置文件中的<interceptor name="params" class="
com.opensymphony.xwork.interceptor.ParametersInterceptor"/>这个拦截器将在RegisterAction的execute()方法执行之前调用，作用是将request请求的参数通过表达式语言设置到相应RegisterAction的模型里．假设你在注册页面输入用户名“moxie”，提交表单ParametersInterceptor就会下面的操作：首先从请求中取得参数的名字和名字对应的值，分别为：“user.username”和“moxie”，根据这个名字，从OgnlValueStack中取得堆栈最上面的getUser().setUsername(“tracy”)操作，即取得RegisterAction对象的User模型，并设置username属性的值为“tracy”。
Action是通过XWork的拦截器ParametersInterceptor从提交的表单中取得请求的参数和值，再通过OgnlValueStack来执行表达式，调用Action和模型里相应的get或set方法，将从请求中取得的值设置到模型中去．
做完这个例子，对WebWork的理解又加深了一些，但距离随心所欲，为我所用还有很长的路要走，继续加油，但愿我的下一个项目可以通过使用WebWork脱胎换骨．