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struts傻瓜式学习(一天篇) [复制链接]

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Struts/Hibernate

struts傻瓜式学习(一天篇)
作者:未知 时间:2005-07-24 21:22 出处:JR 责编:chinaitpower
              摘要:struts傻瓜式学习(一天篇)
作者:林佩雯
    或许有人觉得struts不容易学,似乎里面的一些概念让未接触过的人迷惑,M
VC
1、M
VC
2、模式……我写这篇文章是想让从来没有接触过struts的人,能有个简单的入门指引,当然,
系统
地学习struts是必要的,里面有很多让人心醉的东东,那是后话了。
    该案例包括首页,用户登陆、网站向导页面。就这么简单,没有深奥的struts概念,主要靠动手,然后用心体会~!@#$%^&
    WEB Server用tomcat4。到
http://jakarta.apache.org
下载struts1.1,把zip
文件
释放到c:\struts,拷贝C:\struts\webapps\struts-example.war到c:\tomcat4\webapps中,启动tomcat,war包被释放为struts-example
文件
夹,删除war包,把struts-example
文件
夹更名为test。
一、把WEB-INF\web.xml改成:
    
  
    action
    org.apache.struts.action.ActionServlet
   
      config
      /WEB-INF/struts-config.xml
   
    1
  
  
  
    action
    *.cool
  
   
  
    index.jsp
  
二、把test\WEB-INF\ struts-config.xml改成:
  
  
  
   
  
  
  
  
   
   
  
  
  
  
   
   
   
  
三、增加一个FormBean,类路径为test.UserForm,以下是这个类的内容:
  • package test;

  • import org.apache.struts.action.ActionForm;

  • public class UserForm extends ActionForm
  • {
  •   private
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/String.
    [url=]java[/url]
    .html]String[/url]
    name="lpw";//用户名
  •   private
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/String.
    [url=]java[/url]
    .html]String[/url]
    ps="1111";//密码
  •   public UserForm(){}
  •   public void setName(
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/String.
    [url=]java[/url]
    .html]String[/url]
    s) {name=s;}
  •   public
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/String.
    [url=]java[/url]
    .html]String[/url]
    getName() {return name;}
  •   public void setPs(
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/String.
    [url=]java[/url]
    .html]String[/url]
    s) {ps=s;}
  •   public
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/String.
    [url=]java[/url]
    .html]String[/url]
    getPs() {return ps;}
  • }
    四、增加一个Action的子类,类路径为test. RegistAction,以下是这个类的内容:
  • package test;
  • import
    java
    .lang.reflect.
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/reflect/InvocationTargetException.
    [url=]java[/url]
    .html]InvocationTargetException[/url]
    ;
  • import
    java
    .util.
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/util/Locale.
    [url=]java[/url]
    .html]Locale[/url]
    ;
  • import
    java
    x.servlet.
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>javax/servlet/ServletException.
    [url=]java[/url]
    .html]ServletException[/url]
    ;
  • import
    java
    x.servlet.http.
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>javax/servlet/http/HttpServletRequest.
    [url=]java[/url]
    .html]HttpServletRequest[/url]
    ;
  • import
    java
    x.servlet.http.
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>javax/servlet/http/HttpSession.
    [url=]java[/url]
    .html]HttpSession[/url]
    ;
  • import
    java
    x.servlet.http.
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>javax/servlet/http/HttpServletResponse.
    [url=]java[/url]
    .html]HttpServletResponse[/url]
    ;
  • import org.apache.struts.action.Action;
  • import org.apache.struts.action.ActionError;
  • import org.apache.struts.action.ActionErrors;
  • import org.apache.struts.action.ActionForm;
  • import org.apache.struts.action.ActionForward;
  • import org.apache.struts.action.ActionMapping;
  • import org.apache.struts.util.MessageResources;
  • import test.UserForm;

  • public final class RegistAction extends Action
  • {
  •   public ActionForward execute(ActionMapping mapping,ActionForm form,
  •    
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>javax/servlet/http/HttpServletRequest.
    [url=]java[/url]
    .html]HttpServletRequest[/url]
    request,                  
  •    
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>javax/servlet/http/HttpServletResponse.
    [url=]java[/url]
    .html]HttpServletResponse[/url]
    response) throws
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/lang/Exception.
    [url=]java[/url]
    .html]Exception[/url]

  •   {
  •    
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>java/util/Locale.
    [url=]java[/url]
    .html]Locale[/url]
    locale = getLocale(request);
  •     MessageResources messages = getResources(request);
  •    
    [url= target=_blank http: www.chinaitpower.com Dev Programme Java index.html?>javax/servlet/http/HttpSession.
    [url=]java[/url]
    .html]HttpSession[/url]
    session = request.getSession();
  •     UserForm userform = (UserForm) form;
  •          //此处可以调用其他类来执行
    数据库
    写入或其他逻辑判断

  •          // 如果UserForm传来的参数name的值为默认的lpw,将forward到failed,
  •          // 该名称将到struts-config.xml的中寻找映射的url地址
  •          // (可以是绝对路径,也可以是相对路径),对于本例,是转到failed.cool,
  •          // 还记得吗?后缀为cool的请求全部到action-mappings中寻找
  •          // 对应的action处理,最终目录是wuwu.jsp*/
  •     if( "lpw".equals(userform.getName()) ) return (mapping.findForward("failed"));
  •     else return (mapping.findForward("regist"));
  •   }
  • }
    五、以下所有新增或修改的页面相当于struts的View部分,把首页index.jsp改成:
    站点导航

    用户:
    密码:
    六、增加hello.jsp,用于站点导航:
    site mapThe following is content filling by reader
    七、增加wuwu.jsp,当没有新用户登陆时,将转到这个页面:
    现有用户:
    密码:
    没有得到新的用户!55555~~~~~
    八、增加regist.jsp,当有新用户登陆时,将转到这个页面:
    新用户帐号:
    密码:
    九、启动tomcat4,浏览器中键入http://localhost:8080/test/index.jsp,操作一下,就可以看到结果,并初步理解struts的M、V、C各部分的协同工作原理,当然这是作者的良好意愿,如果读者看得一头雾水,欢迎指出错误在哪里  :)
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