一.前端 ：登陆页面
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@taglib prefix="html" uri="http://struts.apache.org/tags-html"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
</head>
<body>
<html:errors/>
<form action="loginAction.do" method="post">
请您登陆，输入用户名和密码 <br>
用户名:<input type="text" name="username"><html:errors property="user.username.null"/><br/>
密码 :<input type="text" name="password"><html:errors property="user.password.null"/><br/>
<input type="submit" value="提交"> <input type="reset" value="重置"><br>
</form>
</body>
</html>
后台步骤：
一。Action类
1. extends DispatchAction；
2.重写ActionForward execute方法
Users user=(Users)form;//强制类型转换
return mapping.findForward("SUCCESS");
action类如下：
package com.action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import com.entity.Users;
public class LoginAction extends DispatchAction{
public ActionForward execute(ActionMapping mapping,ActionForm form,
HttpServletRequest request,HttpServletResponse response)
throws Exception{
Users user=(Users)form;
return mapping.findForward("SUCCESS");
}
}
二。实体类extends ActionForm如下：
package com.entity;
import org.apache.struts.action.ActionForm;
public class Users extends ActionForm{
private String username;
private String password;
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;
}
}
三。配置struts-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" "http://struts.apache.org/dtds/struts-config_1_3.dtd">
<struts-config>
<form-beans>
<form-bean name="users" type="com.entity.Users">
</form-bean>
</form-beans>
<global-exceptions/>
<global-forwards />
<action-mappings>
<action path="/loginAction" type="com.action.LoginAction" name="users">
<forward name="SUCCESS" path="/success.jsp"></forward>
</action>
</action-mappings>
</struts-config>
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验证的两种方式
方法一。实体类继承ActionForm并重写验证方法
1.实体Users类如下：
package com.entity;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
public class Users extends ActionForm{
private String username;
private String password;
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;
}
public ActionErrors validate(ActionMapping mapping,
javax.servlet.http.HttpServletRequest request){
ActionErrors error=new ActionErrors();//继承自ActionMessages类，信息集合
if(this.getUsername()==null||this.getUsername().trim().equals("")){
error.add("user.username.null", new ActionMessage("user.username.null"));
}
if(this.getPassword()==null||this.getPassword().trim().equals("")){
error.add("user.password.null", new ActionMessage("user.password.null"));
}
return error;
}
}
2.LoginAction类
public class LoginAction extends DispatchAction{
public ActionForward execute(ActionMapping mapping,ActionForm form,
HttpServletRequest request,HttpServletResponse response)
throws Exception{
return mapping.findForward("SUCCESS");
}
}
方法二.Action类中写验证
LoginAction类代码如下：
public class LoginAction extends DispatchAction{
public ActionForward execute(ActionMapping mapping,ActionForm form,
HttpServletRequest request,HttpServletResponse response)
throws Exception{
Users user=(Users)form;
ActionMessages messages=new ActionMessages();//信息集合
if(user.getUsername()==null||user.getUsername().trim().equals("")){
messages.add("user.username.null", new ActionMessage("user.username.null"));//国际化
//this.addErrors(request, messages);
//return mapping.findForward("INPUT");
}
if(user.getPassword()==null||user.getPassword().trim().equals("")){
messages.add("user.password.null", new ActionMessage("user.password.null"));
//this.addErrors(request, messages);
//return mapping.findForward("INPUT");
}
if(messages.size()>0){
this.addErrors(request, messages);
return mapping.getInputForward();
//return mapping.findForward("INPUT");
}
return mapping.findForward("SUCCESS");
}
}
3.struts-config.xml中<action>内容修改如下：
<action input="/index.jsp" path="/loginAction" type="com.action.LoginAction" name="users">
<forward name="SUCCESS" path="/success.jsp"></forward>
</action>