`
静妙仙人
  • 浏览: 84079 次
  • 性别: Icon_minigender_1
  • 来自: 北京
社区版块
存档分类
最新评论

Struts2中的动态方法调用（DMI）

StrutsCSSJSPJavaEECache 
阅读更多

对于DMI的理解我觉得还是看一些代码了解的快和记忆深刻，所以，我就从网上找了一段代码

 

关于Action的方法调用：

1.Action执行的时候不一定要执行execute方法；
2.动态方法调用（DMI）的两种方式：
    a.通过配置文件struts.xml中action的method属性指定调用方法，如：
        <action  method="调用方法名">；
    b.在URL中动态指定调用方法，使用感叹号“!”将action名和调用方法名分割开，如：
        http://localhost:8080/Struts2_DMI/user!add
3.第一种方法需要配置很多action，一般使用第二种方法。

web.xml:

<?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">
  <welcome-file-list>
    <welcome-file>hello.jsp</welcome-file>
  </welcome-file-list>
  <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>

 

struts.xml

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

    <include file="example.xml"/>



    <package name="default" namespace="/" extends="struts-default">
        <default-action-ref name="index" />
        <action name="index">
            <result type="redirectAction">
                <param name="actionName">HelloWorld</param>
                <param name="namespace">/example</param>
            </result>
        </action>
    </package>
     -->

    <!-- Add packages here -->
    <constant name="struts.devMode" value="true" />
     <package name="user" namespace="/" extends="struts-default">
        <action name="userAdd" class="cn.edu.ahau.mgc.struts2.action.UserAction" method="add">
            <result name="addSuccess">/addSuccess.jsp</result>
        </action>
        <action name="userDelete" class="cn.edu.ahau.mgc.struts2.action.UserAction" method="delete">
            <result name="deleteSuccess">/deleteSuccess.jsp</result>
        </action>
        
        <action name="user" class="cn.edu.ahau.mgc.struts2.action.UserAction">
            <result name="addSuccess">/addSuccess.jsp</result>
            <result name="deleteSuccess">/deleteSuccess.jsp</result>
        </action>
    </package>
</struts>

 

 

UserAction.java:

package cn.edu.ahau.mgc.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {

    public String add() {
        return "addSuccess";
    }
    
    public String delete() {
        return "deleteSuccess";
    }
}

 

index.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
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>DMI</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
    <a href="userAdd">UserAdd</a>
    <a href="userDelete">UserDelete</a>
    <br />
    <br />
    
    <a href="user!add">user!add</a>
    <a href="user!delete">user!delete</a>
  </body>
</html>

 

addSuccess.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
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>AddSuccess</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
    User Add Success! <br>
  </body>
</html>

 

deleteSuccess.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%
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>DeleteSuccess</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->
  </head>
  
  <body>
    User Delete Success! <br>
  </body>
</html>

 

1
顶
0
踩
分享到：
| J2EE学习中一些值得研究的开源项目
评论
发表评论

您还没有登录,请您登录后再发表评论

相关推荐

Magicbox
Global site tag (gtag.js) - Google Analytics