功能：登录时提醒要输入用户名与密码
login.jsp
<%...@ page language="java" pageEncoding="ISO-8859-1"%>
<%...@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-template" prefix="template" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-nested" prefix="nested" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html:html locale="true"> <head> <html:base /> </head> <body> <html:errors/><hr> <html:form action="/Login" method="POST"> username:<html:text property="username"/> password:<html:password property="password"/> <html:submit/> </html:form> </body></html:html>index.jsp
<%...@ page language="java" pageEncoding="ISO-8859-1"%><%...@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-template" prefix="template" %><%...@ taglib uri="http://jakarta.apache.org/struts/tags-nested" prefix="nested" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html:html locale="true"> <head> <html:base /> <title>index.jsp</title> </head> <body> <h1>success!</h1> </body></html:html>LoginForm.java
package app;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionError;import org.apache.struts.action.ActionErrors;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionMapping;public class LoginForm extends ActionForm...{
private String username; private String password;
public String getPassword() ...{ return password;
} public void setPassword(String password) ...{ this.password = password; } public String getUsername() ...{ return username; } public void setUsername(String username) ...{ this.username = username; } public ActionErrors validate(ActionMapping mapping,HttpServletRequest request)...{ ActionErrors errors=new ActionErrors(); if(this.username==null||"".equals(username))...{ errors.add("username",new ActionError("username.null")); } if(this.password==null||"".equals(password))...{ errors.add("password",new ActionError("password.null")); } return errors; } public void reset()...{}
}LoginAction.java
package app;import javax.servlet.http.HttpServletRequest;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;public class LoginAction extends Action...{ public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response)...{ String username=((LoginForm)form).getUsername(); String password=((LoginForm)form).getPassword(); if(username.equals("sbx")&&password.equals("123"))...{ return mapping.findForward("success"); }else...{ return mapping.findForward("failure"); } }}资源文件：ApplicationResources.properties
# Resources for parameter 'app.ApplicationResources'