structs环境搭建

（1）<s:fielderror />放在JSP中，如果没在web.xml中配置filter相关内容，会有The Struts dispatcher cannot be found.从而显示报错。

HTTP Status 500 - An exception occurred processing JSP page /regist.jsp at line 36

主要还是因为缺乏导入的包，对于console中的missing,not found和add这些关键字都需要注意，会提示需要导入的包。

（2）需要导入的包

（3）struts2.5.5，其web.xml的配置如下。

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <display-name></display-name>
  <welcome-file-list>
    <welcome-file>login.jsp</welcome-file>
  </welcome-file-list>

  <filter>
      <filter-name>struts2</filter-name>
      <filter-class>
          org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter
      </filter-class>
  </filter>

  <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>

</web-app>

其中filter-class的值在struts2中配置如下，否则出错：

  <filter>
      <filter-name>struts2</filter-name>
      <filter-class>
          org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter
      </filter-class>
  </filter>

（4）struts.xml的配置如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
    <constant name="struts.i18n.encoding" value="gb2312"></constant>
    <package name="shop" namespace="/"  extends="struts-default">
        <action name="login" class="com.wss.action.LoginAction">
            <result name="success" type="chain">show</result>
            <result name="error">/login.jsp</result>
        </action>
        <action name="regist" class="com.wss.action.RegistAction">
            <result name="success">/login.jsp</result>
            <result name="error">/resist.jsp</result>
        </action>
        <action name="show" class="com.wss.action.ShowAction">
            <result name="success">/suc.jsp</result>
            <result name="error">/error.jsp</result>
        </action>
        <action name="car" class="com.wss.action.CarAction">
            <result name="success">/car.jsp</result>
        </action>
    </package>

</struts>    

（5）还有log4j2.xml的配置，但是我现在还不知道这个是做什么用的额。

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

<Configuration status="WARN">

  <Appenders>

    <Console name="Console" target="SYSTEM_OUT">

      <PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>

    </Console>

  </Appenders>

  <Loggers>

     <Logger name="com.demo.NamedHierarchy" level="trace">

       <AppenderRef ref="Console"/>

</Logger>

<Logger name="com.demo" level="debug">

       <AppenderRef ref="Console"/>

</Logger>

    <Root level="error">

      <AppenderRef ref="Console"/>

    </Root>    

  </Loggers>

</Configuration>

（6）整个项目代码的布局结构是如下：

（7）一个Action的实例：

package com.wss.action;

import com.opensymphony.xwork2.ActionSupport;
import com.wss.Dao.School;
import com.wss.Dao.User;
import com.wss.Dao.UserDao;

public class RegistAction extends ActionSupport{

    public RegistAction()
    {
        System.out.println("Initialization RegistAction....");
    }

    private User user =new User();
    //private User user;
    public User getUser() {
        System.out.println("Getting the getUser");
        return user;
    }

    public void setUser(User user) {
        System.out.println("Setting the setUser");
        this.user = user;
    }

    private School school;

    public School getSchool() {
        System.out.println("Getting the getSchool");
        return school;
    }

    public void setSchool(School school) {
        System.out.println("Setting the setSchool");
        this.school = school;
    }

    private String company;
    public void setCompany(String company)
    {
        System.out.println("Setting the company");
        this.company=company;
    }

    public String execute() throws Exception{
        UserDao ud =new UserDao();

        System.out.println("The company is "+this.company+" The name is "+this.user.getName()+" The phone is "+this.user.getAddress());
        System.out.println("The school name is "+this.school.getName()+" The city is "+this.school.getCity()+" The department is "+ this.school.getDepartment());

        //if(ud.regist(user)!=0){

            this.addFieldError("success", "注册成功");
            return SUCCESS;
        //}
        //this.addFieldError("error", "注册失败");
        //return ERROR;

    }

}

（8）其中regist.sjp的代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ page contentType="text/html;charset=gbk"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<%
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%>"> 

    <title>京东商城注册页面</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <%
        request.setCharacterEncoding("gbk");
     %>
  </head>

  <body>
           <center>
               <form action="regist" method="post">

                   用户名：<input type="text" name="user.name"/><br>
                   密&nbsp;&nbsp;码:<input type="password" name="user.password"/><br>
                   手&nbsp;&nbsp;机：<input type="text" name="user.phone" /><br>
                   地&nbsp;&nbsp;址：<input type="text" name="user.address"/><br>

                   公&nbsp;&nbsp;司： <input type="text" name="company"/> <br>

                   学&nbsp;&nbsp;校：<input type="text" name="school.name"/>
                   城&nbsp;&nbsp;市：<input type="text" name="school.city" />
                   院&nbsp;&nbsp;系：<input type="text" name="school.department" />

                   <table>
                    <tr>
                        <td><input type="submit" value="注册"/></td>
                        <td><input type="reset" value="重置" ></td>
                    </tr>
                </table>
               </form>
            <s:fielderror />
           </center>
  </body>
</html>