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  • ActionWildcard通配符

    新建web project:struts2_0500_actionwildcard Build Path 项目图: src: StudentAction.java TeacherAction.java struts.xml WebRoot: index.jsp Student_add.jsp Student_delete.jsp Student_edit.jsp Student_find.jsp Teacher_add.jsp Teacher_

    新建web project:struts2_0500_actionwildcard

    Build Path

    项目图:

      src:                  

        StudentAction.java

        TeacherAction.java

        struts.xml

      WebRoot:

        index.jsp

        Student_add.jsp

        Student_delete.jsp

        Student_edit.jsp

        Student_find.jsp

        Teacher_add.jsp

        Teacher_delete.jsp

     ------------------------------------Hongten---------------------------------

    struts.xml

    代码:

    <?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="http://www.cnblogs.com/hongten/archive/2011/07/31/true" />
     <package name="Student" namespace="/" extends="struts-default">
      <action name="*_*" class="com.b510.hongten.{1}Action">
       <result>
        /{1}_{2}.jsp
                </result>
      </action>
      
      
      <action name="Student_add" class="com.b510.hongten.StudentAction"
       method="add">
       <result>
        /Student_delete.jsp
                </result>
      </action>
     </package>
    </struts>

     ------------------------------------Hongten---------------------------------

     ------------------------------------Hongten---------------------------------

    在这里,我们没有去添加Teacher_edit.jsp和Teacher_find.jsp,要想申明的是,如不美不雅我们要添加的时辰

    直接添加便可,不会因为我们又添加了新的的文件,而影响整个法度模范的运行。可是添加的时辰

    必定要遵守"约定优于设置装备安排"的原则。如:Teacher的首字母必定要大年夜写,Teacher_edit.jsp就得必定要以

    这种形式去写。不然我们还是免不了去改削设置装备安排文件;

    还有一个就是,我们看到struts.xml文件中有两个action,其拭魅这里只是为了做一个小测试二用的:

    我们的法度模范中只用:

      <action name="*_*" class="com.b510.hongten.{1}Action">
       <result>/{1}_{2}.jsp</result>
        </action>

    就足可使我们的法度模范很好的运行起来,可是添加了第二个action后:

      <action name="Student_add" class="com.b510.hongten.StudentAction"
       method="add">
       <result>/Student_delete.jsp</result>
       </action>

    这时辰就会显现我们访谒一个url:http://localhost:1000/struts2_0500_actionwildcard/Student_add

    的时辰,是去的是:Student_delete.jsp 这个页面,而不是我们的Student_add.jsp页面,这是为甚么呢?

    原因是:在struts2中,当我们访谒的url来到的时辰,处事器就会在struts.xml文件中找最接近这个url的action(如不美不雅

    是同一个包中),我们很等闲发现:

      "*_*"和"Student_add" 和url对角力计较,显然是后者要接近,所以选择了Student_delete.jsp,而非Student_add.jsp
     

     ------------------------------------Hongten--------------------------------- 

     ------------------------------------Hongten---------------------------------

    StudentAction.java

    代码:

    package com.b510.hongten;

    import com.opensymphony.xwork2.ActionSupport;

    /**
     * 
     * @author XHW
     * 
     * @date 2011-7-30
     * 
     */
    public class StudentAction extends ActionSupport {
     private static final long serialVersionUID = -5023520095036169842L;

     public String add() {
      return SUCCESS;
     }

     public String delete() {
      return SUCCESS;
     }

     public String edit() {
      return SUCCESS;
     }

     public String find() {
      return SUCCESS;
     }
    }

     ------------------------------------Hongten---------------------------------

     
     

    TeacherAction.java

    代码;

    package com.b510.hongten;

    import com.opensymphony.xwork2.ActionSupport;

    /**
     * 
     * @author XHW
     * 
     * @date 2011-7-30
     * 
     */
    public class TeacherAction extends ActionSupport {
     private static final long serialVersionUID = -5023520095036169843L;

     public String add() {
      return SUCCESS;
     }

     public String delete() {
      return SUCCESS;
     }

     public String edit() {
      return SUCCESS;
     }

     public String find() {
      return SUCCESS;
     }
    }

     ------------------------------------Hongten---------------------------------

     index.jsp

    代码;

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    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="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath%>">
        
        <title>My JSP 'index.jsp' starting page</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="http://www.cnblogs.com/hongten/archive/2011/07/31/styles.css">
     -->
      </head>
      
      <body>
        My JSP 'index.jsp' starting page<br>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Student_add">增添学生</a>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Student_delete">删除学生</a><br>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Student_edit">编辑学生</a>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Student_find">查看学生</a><br>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Teacher_add">增添教员</a>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Teacher_delete">删除教员</a><br>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Teacher_edit">编辑教员</a>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>Teacher_find">查看教员</a><br>
      </body>
    </html>

     ------------------------------------Hongten---------------------------------

    Student_add.jsp

    代码:

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    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="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath%>">
        
        <title>My JSP 'Student_add.jsp' starting page</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="http://www.cnblogs.com/hongten/archive/2011/07/31/styles.css">
     -->

      </head>
      

     
     

      <body>
       My JSP 'Student_add.jsp' starting page <br>
       <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>index.jsp">home</a>
      </body>
    </html>

     ------------------------------------Hongten---------------------------------

    Student_delete.jsp

    代码:

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    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="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath%>">
        
        <title>My JSP 'Student_delete.jsp' starting page</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="http://www.cnblogs.com/hongten/archive/2011/07/31/styles.css">
     -->

      </head>
      
      <body>
        My JSP 'Student_delete.jsp' starting page <br>
       <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>index.jsp">home</a>
      </body>
    </html>

     ------------------------------------Hongten---------------------------------

    Student_edit.jsp

    代码:

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    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="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath%>">
        
        <title>My JSP 'Student_edit.jsp' starting page</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="http://www.cnblogs.com/hongten/archive/2011/07/31/styles.css">
     -->

      </head>
      
      <body>
        My JSP 'Student_edit.jsp' starting page <br>
        <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>index.jsp">home</a>
      </body>
    </html>

     ------------------------------------Hongten---------------------------------

    Student_find.jsp

    代码:

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    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="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath%>">
        
        <title>My JSP 'Student_find.jsp' starting page</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="http://www.cnblogs.com/hongten/archive/2011/07/31/styles.css">

     

     

     -->

      </head>
      
      <body>
        My JSP 'Student_find.jsp' starting page <br>
      <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>index.jsp">home</a>
      </body>
    </html>

     ------------------------------------Hongten---------------------------------

    Teacher_add.jsp

    代码:

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    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="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath%>">
        
        <title>My JSP 'Teacher_add.jsp' starting page</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="http://www.cnblogs.com/hongten/archive/2011/07/31/styles.css">
     -->

      </head>
      
      <body>
       My JSP 'Teacher_add.jsp' starting page<br>
       <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>index.jsp">home</a>
      </body>
    </html>

     

     ------------------------------------Hongten---------------------------------

    Teacher_delete.jsp

    代码;

    <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
    <%
    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="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath%>">
        
        <title>My JSP 'Teacher_delete.jsp' starting page</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="http://www.cnblogs.com/hongten/archive/2011/07/31/styles.css">
     -->

      </head>
      
      <body>
       My JSP 'Teacher_delete.jsp' starting page <br>
      <a href="http://www.cnblogs.com/hongten/archive/2011/07/31/<%=basePath %>index.jsp">home</a>
      </body>
    </html>

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  • 原文地址:https://www.cnblogs.com/90zyh/p/2992789.html
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