Struts中ActionForm的使用及传参

来源：互联网发布：2016上半年进出口数据编辑：程序博客网时间：2024/06/01 09:07

ActionForm的使用及传参

ActionForm是Struts中的模型层,它主要用于保存页面传来的参数,并用于判断是否为空,是否验证错误

第一种传参(采用JavaBean的实体做为参数,及以类作为参数)

1.login.jsp(登录界面,传参)

<%@ page language="java" pageEncoding="GB18030"%><%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> <%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%> <html> <head><title>JSP for LoginForm form</title></head><body><form action="login.do">username : <input type="text" name="user.username"/><html:errors property="username"/><br/>userpwd : <input type="password" name="user.userpwd"/><html:errors property="userpwd"/><br/><input type="submit"/></form></body></html>

2.User.java(JavaBean类)

package com.feng.javabean;public class User {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;}}

3.loginForm(ActionForm,接受参数,并赋值)

package com.feng.struts.form;import javax.servlet.http.HttpServletRequest;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 com.feng.javabean.User;public class UserloginForm extends ActionForm {User user = new User();// 接受从页面传过来的参数,并保存到User中public User getUser() {return user;}public void setUser(User user) {this.user = user;}public ActionErrors validate(ActionMapping mapping,HttpServletRequest request) {ActionErrors errors = new ActionErrors();if (user.getUsername() == null || "".equals(user.getUsername())) {errors.add("username", new ActionMessage("username.null"));}if (user.getPassword() == null || "".equals(user.getPassword())) {errors.add("password", new ActionMessage("password.null"));}return errors;}public void reset(ActionMapping mapping, HttpServletRequest request) {// TODO Auto-generated method stub}}

4.loginAction(处理类)

package com.feng.struts.action;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.Action;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.action.ActionMessage;import org.apache.struts.action.ActionMessages;import com.feng.javabean.User;import com.feng.struts.form.UserloginForm;public class UserloginAction extends Action {public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {UserloginForm userloginForm = (UserloginForm) form;User user = userloginForm.getUser();if (user.getUsername().equals("feng")&& user.getPassword().equals("619")) {return mapping.findForward("ok");} else {ActionErrors errors = new ActionErrors();// errors.add("num", new ActionMessage("num.zero"));// super.saveErrors(request, errors);//此方法已经过时ActionMessages message = new ActionMessages();message.add("d", new ActionMessage("num.zero"));super.saveErrors(request, message);return mapping.findForward("no");}}}

5.struts-config.xml(配置文件)

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd"><struts-config> <data-sources /> <form-beans > <form-bean name="UserloginForm" type="com.feng.struts.form.UserloginForm" /> </form-beans> <global-exceptions /> <global-forwards /> <action-mappings > <action attribute="UserloginForm" input="/login.jsp" name="loginUserForm" path="/login" scope="request" type="com.feng.struts.action.UserloginAction" /> </action-mappings> <message-resources parameter="com.feng.struts.ApplicationResources" /></struts-config>

6.ApplicationResources(资源文件)

username.null=/u7528/u6237/u540D/u4E0D/u80FD/u4E3A/u7A7Apassword.null=/u5BC6/u7801/u4E0D/u80FD/u4E3A/u7A7A

另一种传参(采用BeanUtils类传参)

1.loginForm(ActionForm)

package com.feng.struts.form;import javax.servlet.http.HttpServletRequest;import org.apache.struts.action.ActionErrors;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionMapping;public class LoginUserForm extends ActionForm {private String password;private String username;public ActionErrors validate(ActionMapping mapping,HttpServletRequest request) {// TODO Auto-generated method stubreturn null;}public void reset(ActionMapping mapping, HttpServletRequest request) {// TODO Auto-generated method stub}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;}}

2.loginAction(Action)

package com.feng.struts.action;import java.lang.reflect.InvocationTargetException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.commons.beanutils.BeanUtils;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 com.feng.javabean.User;import com.feng.struts.form.LoginUserForm;public class LoginUserAction extends Action {public ActionForward execute(ActionMapping mapping, ActionForm form,HttpServletRequest request, HttpServletResponse response) {LoginUserForm loginUserForm = (LoginUserForm) form;User user = new User();try {BeanUtils.copyProperties(user, loginUserForm);// 把ActionForm中的数据填充到User类中} catch (IllegalAccessException e) {e.printStackTrace();} catch (InvocationTargetException e) {e.printStackTrace();}return null;}}

其他代码同上