实例学习Struts

　　创建 Controller

　　LogonAction.java：

package org.monotonous.struts; import java.util.Locale; 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 org.apache.commons.beanutils.PropertyUtils; public final class LogonAction extends Action { public ActionForward execute( ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception { Locale locale = getLocale(request); MessageResources messages = getResources(request); // Validate the request parameters specified by the user ActionErrors errors = new ActionErrors(); String username = (String) PropertyUtils.getSimpleProperty(form, "username"); String password = (String) PropertyUtils.getSimpleProperty(form, "password"); if ((username != "foo") || (password != "bar")) errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("error.password.mismatch")); // Report any errors we have discovered back to the original form if (!errors.isEmpty()) { saveErrors(request, errors); return (mapping.getInputForward()); } // Save our logged-in user in the session HttpSession session = request.getSession(); // Do something with session... // Remove the obsolete form bean if (mapping.getAttribute() != null) { if ("request".equals(mapping.getScope())) request.removeAttribute(mapping.getAttribute()); else session.removeAttribute(mapping.getAttribute()); } // Forward control to the specified success URI return (mapping.findForward("success")); } }

　　LogoffAction.java：

　　package org.monotonous.struts;

import java.util.Locale; 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.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import org.apache.struts.util.MessageResources; public final class LogoffAction 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(); session.removeAttribute("userattrib"); session.invalidate(); // Forward control to the specified success URI return (mapping.findForward("success")); } }

　　到浏览器里面欣赏一下吧，不过还不到开香槟的时候，也许你应该为这个应用考虑一些安全措施，下一次我再讲咯。

　　本文由yesky与Matrix共同策划