Struts数据标签之action标签实战

妖狐艹你老母 2021-07-24 21:13 425阅读 0赞

**一 action**

package org.crazyit.app.action;
    
    import com.opensymphony.xwork2.ActionSupport;
    import com.opensymphony.xwork2.ActionContext;
    
    public class TagAction extends ActionSupport
    {
        // 封装用户请求参数的author成员变量
        private String author;
    
        // author的setter和getter方法
        public void setAuthor(String author)
        {
            this.author = author;
        }
        public String getAuthor()
        {
            return this.author;
        }
        // 定义第一个处理逻辑
        public String execute() throws Exception
        {
            return "done";
        }
        // 定义第二个处理逻辑
        public String login() throws Exception
        {
            ActionContext.getContext().
                put("author", getAuthor());
            return "done";
        }
    }

**二 配置**

<?xml version="1.0" encoding="GBK"?>
    <!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.i18n.encoding" value="GBK"/>
    
        <package name="lee" extends="struts-default">
            
            <action name="tag1" class="org.crazyit.app.action.TagAction">
                <result name="done">/WEB-INF/content/succ.jsp</result>
            </action>
            
            <action name="tag2" class="org.crazyit.app.action.TagAction"
                method="login">
                <result name="done">/WEB-INF/content/loginSucc.jsp</result>
            </action>
            <action name="*">
                <result>/WEB-INF/content/{1}.jsp</result>
            </action>
        </package>
    </struts>

**三 视图**

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
    <%@taglib prefix="s" uri="/struts-tags"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
        "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>使用s:action标签在页面中调用Action</title>
    </head>
    <body>
    下面调用第一个Action，并将结果包含到本页面中。<br/>
    <s:action name="tag1" executeResult="true"/>
    <hr/>
    下面调用第二个Action，并将结果包含到本页面中。<br/>
    但阻止本页面请求参数传入Action。<br/>
    <s:action name="tag2" executeResult="true"
        ignoreContextParams="true"/>
    <hr/>
    下面调用第三个Action，且并不将结果包含到本页面中。<br/>
    <s:action name="tag2" executeResult="false"/>
    本页面是否可访问？<s:property value="author"/>
    </body>
    </html>

**四 测试**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2NoZW5ncWl1bWluZw_size_16_color_FFFFFF_t_70]: /images/20210724/c2ad67f5804a445b8ab787be425480b3.png