我們知道struts1與spring整合是靠
org.springframework.web.struts.DelegatingActionProxy來實現的,以下通過具體一個用戶登錄實現來
說明struts2整合spring的相關內容.
一、準備工作
1.實例分析我們在這不與數據庫打交道,所有就是當用登錄的時候判斷用戶名是否爲指定
值,密碼是否爲指定值,以及相關的異常處理、
2.爲什麼我們要說struts2整合spring呢?相信在家都知道,我也不用多說了....
4.在 http://struts.apache.org/download.cgi#struts212
下
載struts2的jar包,源碼,API文檔.
5.在 http://static.springframework.org/downloads/nightly/release-download.php
下
載不同版本的spring的jar包,源碼,API文檔.
6.配置開發環境:
MyEclipse6.0+Eclipse3.3+JDK6.0+Tomcat6.0+Struts
2.0.11+spring2.0。
7.新建web項目,導入相應的jar包,如以下所示:
a.由於現在IDE開發工具還沒有對struts2.0有很好的支持,所有我們需要手功配置,首先將我們剛下下來的struts2.0的lib裏面的commons-logging-1.0.4.jar、ognl-2.6.11.jar、xwork-
2.0.4.jar、freemarker-2.3.8.jar、struts2-core-2.0.11.1.jar以及
struts2.0
裏面所需要的插件包struts2-spring-plugin-
2.0.11.1.jar添加的WEB-INF/lib下面
b.通過通過IDE開發工具項目對spring2.0的支持
7.在src下建立struts.xml文件(具體的寫法在後面呈現)
8.配置web.xml,如下:
< web-app version ="2.5" xmlns ="http://java.sun.com/xml/ns/javaee"
xmlns:xsi ="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation ="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" >
<!-- 加載struts2核心 -->
< 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 >
<!-- 指明spring配置文件在何處 -->
< context-param >
< param-name > contextConfigLocation </ param-name >
< param-value > classpath*:applicationContext.xml </ param-value >
</ context-param >
<!-- 加載spring配置文件applicationContext.xml -->
< listener >
< listener-class >
org.springframework.web.context.ContextLoaderListener
</ listener-class >
</ listener >
</ web-app >
二、建立前臺頁面
1.用戶登錄肯定有一個用戶登錄頁面login.jsp,如下:
<% @ taglib prefix = " s " uri = " /struts-tags " %>
<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//CN" >
< html >
< head >
< title > login2 </ title >
</ head >
< body >
< s:form name ="login" action ="login" method ="post" >
< s:textfield name ="username" label ="帳號" ></ s:textfield >
< s:password name ="password" label ="密碼" ></ s:password >
< s:submit ></ s:submit >
</ s:form >
</ body >
</ html >
2.若登錄成功的index.jsp文件,如下:
<! DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//CN" >
< html >
< head >
< title > login2 </ title >
</ head >
< body >
< div >
< h4 > 歡迎你! </ h4 >< font color ="red" > ${username} </ font >
< br />
< h4 > 你登錄的密碼是 < h4 >< font color ="red" > ${password} </ font > ;
</ div >
</ body >
</ html >
3、用戶名非法提示頁面.usernameInvalid.jsp(通過el表達示得到異常信息
)
pageEncoding = " GB18030 " %>
<! 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=GB18030" >
< title > Insert title here </ title >
</ head >
< body >
用戶名非法: < font color ="red" > ${exception.message} </ font >
</ body >
</ html >
4、密碼非法提示頁面.passwordInvalid.jsp(struts2標籤得到異常信息
);
pageEncoding = " GB18030 " %>
<% @ 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=GB18030" >
< title > Insert title here </ title >
</ head >
< body >
密碼非法: < FONT color ="red" >< s:property value ="exception.message" /></ FONT >
</ body >
</ html >
三、建
立對應的action
1.提供用戶請求服務的LoginService類
import org.topCSA.s2s.exception.PasswordException;
import org.topCSA.s2s.exception.UsernameException;
public class LoginService
{
/*
* 我們這只是一個小的例子,不與數據庫打交到
* 若有數據庫操作,那麼在這個LoginService就是操作具體Dao類實現登錄的相關操作
*/
public boolean validate(String username,String password) throws Exception
{
boolean v = false ;
if ( ! " xcp " .equals(username)) // 如果用戶名不等於xcp,就拋出一個異常
{
throw new UsernameException( " 用 戶名不正確 " );
}
else if ( ! " 123 " .equals(password))))// 如果密碼不等於 123,就拋出一個異常
{
throw new PasswordException( " 密 碼不正確 " );
}
else
{
v = true ;
}
return v;
}
}
2.接收用戶請求的LoginAction類
import org.topCSA.s2s.service.LoginService;
import com.opensymphony.xwork2.ActionSupport;
public class LoginAction extends ActionSupport
{
/**
*
*/
private static final long serialVersionUID = 1L ;
private String username;
private String password;
/*
* 我們通過Spring的IOC容器注入LoginService,從而減少類之間的依賴關係
*/
private LoginService loginService;
public LoginService getLoginService()
{
return loginService;
}
public void setLoginService(LoginService loginService)
{
this .loginService = loginService;
}
public String getUsername()
{
return username;
}
public void setUsername(String username)
{
this .username = username;
}
public String getPassword()
{
return password;
}
public void setPassword(String password)
{
this .password = password;
}
@Override
public void validate()
{
/*
* 我們可以在這個方法類加一些輸入驗證 但是爲了體現後面我們寫的業務邏輯方法這就不驗證
*/
}
@Override
public String execute() throws Exception
{
boolean result = loginService.validate(username, password);
if (result == true )
{
return SUCCESS;
}
else
{
return INPUT;
}
}
}
四、配
置struts.xml與applicationContext.xml
1.配置struts.properties,爲了解決中文問題,具體用法參照struts2的用法如下:裏面加上struts.i18n.encoding = gb2312,當然也可以直接加到struts.xml裏面寫法爲
<constant
name="struts.i18n.encoding" value="gbk"></constant>
2.配置struts.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 = " struts2 " extends = " struts-default " >
< action name = " login " class = " LoginAction " >
< exception - mapping result = " usernameInvalid " exception = " org.topCSA.s2s.exception.UsernameException " />
< exception - mapping result = " passwordInvalid " exception = " org.topCSA.s2s.exception.PasswordException " />
< result name = " success " >/ index.jsp </ result >
< result name = " input " >/ login.jsp </ result >
< result name = " usernameInvalid " >/ usernameInvalid.jsp </ result >
< result name = " passwordInvalid " >/ passwordInvalid.jsp </ result >
</ action >
</ package >
</ struts >
3.配置applicationContext.xml
< beans
xmlns = " http://www.springframework.org/schema/beans "
xmlns:xsi = " http://www.w3.org/2001/XMLSchema-instance "
xsi:schemaLocation = " http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd " >
< bean name = " loginService " class = " org.topCSA.s2s.service.LoginService " />
< bean name = " LoginAction " class = " org.topCSA.s2s.action.LoginAction " >
< property name = " loginService " >
< ref bean = " loginService " />
</ property >
</ bean >
</ beans >
五、測試(全部成功)