Struts2.0: My First Example

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文章标签：

#struts #user #import #iterator #list #action

本文详细介绍了一个基于Struts2.0的简单应用实例，包括文件结构、配置文件、Java类定义、页面展示等核心内容，并通过实际操作展示了如何实现用户列表显示与新增功能。

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1. folder structure

2. struts.xml

<! DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd" >

< struts >

< include file ="user/user.xml" />

</ struts >

3. struts.property
Notice: If you have config these two constants in struts.xml, you shouldn't config them here any more, or there will be errors report.

struts.devMode = true

struts.enable.DynamicMethodInvocation = true

4. user.xml

<! DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd" >

< struts >

< package name ="user" namespace ="/user" extends ="struts-default" >

< action name ="crud!*" method ="{1}" class ="user.UserAction" >

< result name ="input" > /user/UserForm.jsp </ result >

< result name ="list" > /user/UserList.jsp </ result >

< result name ="success" type ="redirect-action" > crud!list.action </ result >

</ action >

</ package >

</ struts >

5. User.java

package user;

public class User {

private String userid;

private String username;

private String password;

/**

* @return the password

public String getPassword() {

return password;

}

/**

* @param password the password to set

public void setPassword(String password) {

this.password = password;

}

/**

* @return the userid

public String getUserid() {

return userid;

}

/**

* @param userid the userid to set

public void setUserid(String userid) {

this.userid = userid;

}

/**

* @return the username

public String getUsername() {

return username;

}

/**

* @param username the username to set

public void setUsername(String username) {

this.username = username;

}

6. UserAction.java

package user;

import java.util.ArrayList;

import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {

private User user = new User();

private List<User> users;

public String list() {

BizService bizService = new BizService();

users = bizService.getUsers();

return "list";

}

public String add() {

BizService bizService = new BizService();

if(bizService.add(user)) {

return SUCCESS;

} else {

return INPUT;

}

/**

* @return the users

public List getUsers() {

return users;

}

/**

* @param users the users to set

public void setUsers(List<User> users) {

this.users = users;

}

/**

* @return the user

public User getUser() {

return user;

}

/**

* @param user the user to set

public void setUser(User user) {

this.user = user;

}

7. BizService.java
This is just a example, but does not do actual work indeed.

package user;

import java.util.ArrayList;

import java.util.List;

public class BizService {

public List getUsers() {

List<User> alUser = new ArrayList();

User u1 = new User();

u1.setUserid("1");

u1.setUsername("lwp1");

u1.setPassword("password1");

User u2 = new User();

u2.setUserid("2");

u2.setUsername("lwp2");

u2.setPassword("password2");

alUser.add(u1);

alUser.add(u2);

return alUser;

}

public boolean add(User user) {

//Do actual addition here

return true;

}

8. index.jsp
Two links: one used to show list action, and the other to show add action.

<% @ page contentType="text/html; charset=UTF-8" %>

<% @ taglib prefix="s" uri="/struts-tags" %>

<% --

@ author: Newweapon

@ date: 2007-5-4, ??02:47:36

-- %>

< html >

< head >

< title > Struts 2.0 </ title >

</ head >

< body >

< p > < a href ="<s:url action=" crud!list" /> "> list users </ a > </ p >

< p > < a href ="UserForm.jsp" > add a user </ a > </ p >

</ body >

</ html >

9. UserForm.jsp

<% @ page contentType="text/html; charset=UTF-8" %>

<% @ taglib prefix="s" uri="/struts-tags" %>

<% --

@ author: Newweapon

@ date: 2007-5-4, ??06:20:09

-- %>

< html >

< head >

< title > User Form </ title >

</ head >

< body >

< h2 > User Form </ h2 >

< table >

< s:form action ="crud!add.action" method ="post" >

< s:textfield name ="user.userid" value ="%{user.userid}" label ="UserID" size ="20" />

< s:textfield name ="user.username" value ="%{user.username}" label ="UserName" size ="20" />

< s:textfield name ="user.password" value ="%{user.password}" label ="Password" size ="20" />

< s:submit value ="submit" />

</ s:form >

</ body >

</ html >

10. UserList.jsp

<% @ page contentType="text/html; charset=UTF-8" %>

<% @ taglib prefix="s" uri="/struts-tags" %>

<% --

@ author: Newweapon

@ date: 2007-5-4, pm 03:11:41

-- %>

< html >

< head >

< title > User List </ title >

</ head >

< body >

< h2 > User List </ h2 >

< table >

< tr >

< td > UserID </ td >

< td > UserName </ td >

< td > Password </ td >

</ tr >

< s:iterator value ="users" status ="status" >

< tr >

< td >< s:property value ="userid" /></ td >

< td >< s:property value ="username" /></ td >

< td >< s:property value ="password" /></ td >

</ tr >

</ s:iterator >

</ table >

< p >< a href ="index.jsp" > Back to index.jsp </ a ></ p >

</ body >

</ html >

11. web.xml

<? xml version="1.0" encoding="UTF-8" ?>

< web-app id ="WebApp_9" 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 > yoursite </ display-name >

< filter >

< filter-name > struts2 </ filter-name >

< filter-class > org.apache.struts2.dispatcher.FilterDispatcher </ filter-class >

</ filter >

<!-- The webapplication's descriptor file contains one filter and its mapping.

By default, the filter is mapped to /*, meaning all requests will be

intercepted, but only those ending with a specific suffix (.action,

by default) and certain special paths (for static files) will be processed

and handled by WebWork

-->

< filter-mapping >