Struts2基本程序演示

Struts2启动配置

 <?xml version="1.0" encoding="UTF-8"?>

 <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"

          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"

          version="3.1">

     <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>

 </web-app>

Struts2主配置文件

 <?xml version="1.0" encoding="UTF-8" ?>

 <!DOCTYPE struts PUBLIC

     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

     "http://struts.apache.org/dtds/struts-2.3.dtd">

 <struts>

     <constant name="struts.enable.DynamicMethodInvocation" value="false" />

     <constant name="struts.devMode" value="true" />

     <!--默认就是UTF-8 所以不配置也行-->

     <!--<constant name="struts.i18n.encoding" value="UTF-8"/>-->

     <package name="default" namespace="/" extends="struts-default">

         <action name="index">

             <result>/WEB-INF/main.jsp</result>

         </action>

     </package>

     <!--struts2qs模块-->

     <include file="org/zln/struts2qs/cfg/struts2_struts2qs.xml"/>

 </struts>

Struts2模块文件配置

 <?xml version="1.0" encoding="UTF-8" ?>

 <!DOCTYPE struts PUBLIC

     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

     "http://struts.apache.org/dtds/struts-2.3.dtd">

 <struts>

     <!--国际化资源-->

     <constant name="struts.custom.i18n.resources" value="org/zln/struts2qs/resource/messageResource"/>

     <!--struts2qs模块-->

     <package name="struts2qs" namespace="/struts2qs" extends="struts-default">

         <!--登录界面-->

         <action name="loginUI" class="org.zln.struts2qs.action.LoginAction" method="loginUI">

             <result name="success">/WEB-INF/struts2qs/loginForm.jsp</result>

         </action>

         <!--登录动作-->

         <action name="loginDo" class="org.zln.struts2qs.action.LoginAction" method="loginDo">

             <result name="success">/WEB-INF/struts2qs/welcome.jsp</result>

             <result name="input">/WEB-INF/struts2qs/loginForm.jsp</result>

         </action>

         <!--获取书籍-->

         <action name="getBooks" class="org.zln.struts2qs.action.BookAction" method="getBook">

             <result name="success">/WEB-INF/struts2qs/showBooks.jsp</result>

             <result name="login">/WEB-INF/struts2qs/loginForm.jsp</result>

         </action>

     </package>

 </struts>

Action

 package org.zln.struts2qs.action;

 import com.opensymphony.xwork2.ActionContext;

 import com.opensymphony.xwork2.ActionSupport;

 import org.apache.commons.lang3.StringUtils;

 /**

  * Created by sherry on 15-7-8.

  */

 public class LoginAction extends ActionSupport {

     private String username;

     private String password;

     //登录界面

     public String loginUI(){

         return SUCCESS;

     }

     //登录动作

     public String loginDo(){

         System.out.println("获取参数：" + username + ":" + password);

         if ("zln".equals(username)

                 &&"123".equals(password)){

             ActionContext.getContext().getSession().put("user",username);

             return SUCCESS;

         }else {

             return INPUT;

         }

     }

     //输入校验

     //所有方法的输入校验

     @Override

     public void validate() {

         super.validate();

     }

     //指定方法的输入校验

     public void validateLoginDo(){

         if (StringUtils.isEmpty(username)){

             //对错误信息进行了国际化 也可以直接用文字

             addFieldError("username",getText("username.required"));

         }

     }

     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;

     }

 }

 /*

 Action访问Servlet API

 间接访问

      static ActionContext     getContext()

 直接访问

 * */

 package org.zln.struts2qs.action;

 import com.opensymphony.xwork2.ActionContext;

 import com.opensymphony.xwork2.ActionSupport;

 import org.zln.struts2qs.service.BookService;

 /**

  * Created by sherry on 15-7-8.

  */

 public class BookAction extends ActionSupport {

     private String[] books;

     public String getBook(){

         String user = (String) ActionContext.getContext().getSession().get("user");

         if ("zln".equals(user)){

             //实际开发中会从容器中获取依赖对象

             BookService bookService = new BookService();

             books = bookService.getLeeBooks();

             return SUCCESS;

         }else {

             return LOGIN;

         }

     }

     public String[] getBooks() {

         return books;

     }

     public void setBooks(String[] books) {

         this.books = books;

     }

 }

jsp页面

 <%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>

 <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>

 <%@ taglib prefix="s" uri="/struts-tags" %>

 <%

     String home = request.getContextPath();

 %>

 <html>

 <head>

     <%--s:text标签输出国际化信息--%>

     <title><s:text name="loginPage"/></title>

 </head>

 <body>

     <form action="<%=home%>/struts2qs/loginDo.action" method="post">

         <table>

             <caption>用户登录</caption>

             <tr>

                 <td>用户名：</td>

                 <td><input type="text" name="username" /></td>

             </tr>

             <tr>

                 <td>密 码：</td>

                 <td><input type="password" name="password" /> </td>

             </tr>

             <tr>

                 <td colspan="2">

                     <input type="submit" value="提交"/>

                     <input type="reset" value="重置" />

                 </td>

             </tr>

         </table>

     </form>

     <hr/>

     <%--使用Struts2标签 默认提供表单输出提示--%>

     <s:form namespace="/struts2qs" action="loginDo" method="POST">

         <%--使用标签的 key 输出国际化信息--%>

         <s:textfield name="username" key="username"/>

         <s:password name="password" label="密  码"/>

         <s:submit value="提交"></s:submit>

     </s:form>

 </body>

 </html>

 <%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>

 <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>

 <%@ taglib prefix="s" uri="/struts-tags" %>

 <%

     String home = request.getContextPath();

 %>

 <html>

 <head>

     <%--使用表达式输出国际化信息--%>

     <title><s:property value="%{getText('succPage')}"/> </title>

 </head>

 <body>

     欢迎，${sessionScope.user}，您已经登录！<br/>

     <a href="<%=home%>/struts2qs/getBooks.action">获取书籍列表</a>

 </body>

 </html>

 <%@ page import="com.opensymphony.xwork2.util.ValueStack" %>

 <%@ page contentType="text/html;charset=UTF-8" language="java" pageEncoding="UTF-8" %>

 <%@ taglib prefix="c" uri="http://java.sun.com/jstl/core" %>

 <%@ taglib prefix="s" uri="/struts-tags" %>

 <html>

 <head>

     <title>书籍</title>

 </head>

 <body>

     <table border="1" width="360">

         <%

             /*Struts2的所有属性参数被封装在此*/

             ValueStack valueStack = (ValueStack) request.getAttribute("struts.valueStack");

             String[] books = (String[]) valueStack.findValue("books");

             for (String book:books){

                 %>

                 <tr>

                     <td>书名：</td>

                     <td><%=book%></td>

                 </tr>

         <%

             }

         %>

     </table>

     <hr/>

     <table border="1" width="360">

         <caption>书籍</caption>

         <s:iterator value="books" status="index">

             <s:if test="#index.odd == true">

                 <tr style="background-color: aqua">

             </s:if>

             <s:else>

                 <tr>

             </s:else>

                     <td>书名：</td>

                     <td><s:property/></td>

                 </tr>

         </s:iterator>

     </table>

     <hr/>

     <a href="${pageContext.request.contextPath}/index.action">返回首页</a>

 </body>

 </html>

Action访问Servlet API的方法

巴特西

Struts2基本程序演示

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