新人进ITEYE2012/06/03Struts2心得

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Struts2第一步：?

1.新建一个web项目，在web.xml中加入一个filter

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<filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> 

?2.导入struts2的jar包，可去官网下载?

3.从例子中拷贝一个struts.xml的配置文件过来?

下面是我做个第一个小例子：?

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<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"    "http://struts.apache.org/dtds/struts-2.0.dtd"><struts>    <constant name="struts.devMode" value="true" />       <package name="user" namespace="/user" extends="struts-default"><action name="userlist" method="getUsers"><result>/list.jsp</result></action><action name="input" method="addInput"><result>/input.jsp</result></action><action name="update" method="update"><result>/update.jsp</result></action><action name="updateSubmit" method="updateSubmit"><interceptor-ref name="token"></interceptor-ref><interceptor-ref name="defaultStack"></interceptor-ref><result name="fail">/error.jsp</result><result name="updatefail">/updatefail.jsp</result><result name="updateSuccess">/updateSuccess.jsp</result><result name="invalid.token" type="redirectAction"><param name="namespace">/user</param><param name="actionName">userlist</param></result></action><action name="addUser" method="addUser"><!-- strtus2 默认的拦截器stack 没有加上token这个拦截器 --><interceptor-ref name="token"></interceptor-ref><!-- 一旦配了单独的拦截器 默认的拦截器栈 就失效了 需要手动加上 --><interceptor-ref name="defaultStack"></interceptor-ref><result name="invalid.token" type="redirectAction"><param name="namespace">/user</param><param name="actionName">userlist</param></result><result name="fail">/error.jsp</result><result>/list.jsp</result></action><action name="deleteUser" method="deleteUser"><result type="redirectAction"><param name="namespace">/user</param><param name="actionName">userlist</param></result></action></package></struts>

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?简单分为4个包 ? dao ?action ? model ?service ?分别做增删改查的操作?

action的代码：用util模拟了dao层 因为没用到数据库所以service也给放弃了?

只有util模拟数据库 ?model ?和 action?

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package com.aowin.action;import java.util.List;import java.util.Map;import com.aowin.model.User;import com.aowin.util.Util;import com.opensymphony.xwork2.Action;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class UserAction extends ActionSupport {private int idss ;private int id;private User user;private List<User> userList;private Map request ;public int getIdss() {return idss;}public void setIdss(int idss) {this.idss = idss;}public Map getRequest() {return request;}public void setRequest(Map request) {this.request = request;}public int getId() {return id;}public void setId(int id) {this.id = id;}public User getUser() {return user;}public void setUser(User user) {this.user = user;}public List<User> getUserList() {return userList;}public void setUserList(List<User> userList) {this.userList = userList;}//1.开始在页面上显示 所有的 数据public String getUsers() {userList = Util.list;// 模拟去数据库操作request = (Map) ActionContext.getContext().get("request");request.put("userList", userList);return Action.SUCCESS;}//仅仅是跳转到add界面public String addInput() {return Action.SUCCESS;}//点击修改后的进入到这个方法public String update() {//看看问号传进来的id是否有得到request = (Map) ActionContext.getContext().get("request");for (User u : Util.list) {if (u.getId() == this.id) {user = u;}}request.put("user", user);return Action.SUCCESS;}//修改后提交的方法updateSubmit（）public String updateSubmit() {User us = null ;//用一个us接住上传来的user 根据上传来的id得到原来的us  us去setname 和address userList = Util.list;int id = user.getId() ;String name = user.getName();String address = user.getAddress() ;if("".equals(name.trim()) || "".equals(address.trim())){return "fail" ;}//看看是否需要setid//user.setId(user.getId());for (User u : userList) {if(u.getName().equals(name.trim()) && u.getAddress().equals(address.trim())){return "updatefail" ;}if (u.getId() == id) {us = u;}}us.setId(id);us.setName(name);us.setAddress(address);request = (Map) ActionContext.getContext().get("request");request.put("userList", userList);return "updateSuccess" ;}//增加用户public String addUser(){userList = Util.list;String name = user.getName();String address = user.getAddress() ;for(User u : userList){System.out.println(u.getName());if(u.getName().equals(name.trim()) || u.getAddress().equals(address.trim())||"".equals(name.trim())||"".equals(address.trim())){return "fail" ; }}try{id = userList.get(userList.size()-1).getId() + 1 ;}catch (Exception e) {id = 1 ;}user.setId(id);user.setName(name);user.setAddress(address);userList.add(user);request = (Map) ActionContext.getContext().get("request");request.put("userList", userList);return Action.SUCCESS;}//删除用户public String deleteUser(){userList = Util.list;userList.remove(idss);request = (Map) ActionContext.getContext().get("request");request.put("userList", userList);return Action.SUCCESS;}}

import java.util.ArrayList;import java.util.List;import com.aowin.model.User;public class Util {public static List<User> list = new ArrayList<User>();static {for (int i = 1; i < 7; i++) {User user = new User();user.setId(i);user.setAddress("上海" + i);user.setName("张三" + i);list.add(user);}}}