Struts
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,MVC1、MVC2、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:
二、把test\WEB-INF\ struts-config.xml改成:
br>
package test;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
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, HttpServletRequest request, HttpServletResponse response)
throws Exception
{
Locale locale = getLocale(request);
MessageResources messages = getResources(request);
HttpSession 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
// (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
六、增加hello.jsp,用于站点导航:
site map
The 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!
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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