Struts 隐藏值示例

绝地灬酷狼 2023-02-15 05:30 11阅读 0赞

> 下载此Struts隐藏值示例– [Struts-HiddenValue-Example.zip][]

在这个Struts示例中，您将学习如何使用Struts **<html：hidden>**标记创建HTML隐藏字段。

## 1.文件夹结构 ##

这是Maven创建的最终项目结构。 请创建相应的文件夹。

![Struts-hidden-value-folder][]![Struts-hidden-value-folder][Struts-hidden-value-folder 1]

## 2.动作课 ##

创建一个Action类，只转发请求。

**HtmlHiddenAction.java**

package com.mkyong.common.action;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.apache.struts.action.Action;
    import org.apache.struts.action.ActionForm;
    import org.apache.struts.action.ActionForward;
    import org.apache.struts.action.ActionMapping;
    
    public class HtmlHiddenAction extends Action{
    	
    	public ActionForward execute(ActionMapping mapping,ActionForm form,
    			HttpServletRequest request,HttpServletResponse response) 
            throws Exception {
    		
    		return mapping.findForward("success");
    	}
    	
    }

## 3.属性文件 ##

创建一个属性文件，并声明错误和标签消息。

**通用属性**

#error message
    error.common.html.hidden.name.required = Hidden value "Name" is required.
    
    #label message
    label.common.html.hidden.button.submit = Submit
    label.common.html.hidden.button.reset = Reset

## 4. ActionForm ##

创建一个ActionForm，其中包含一个名称变量和表单验证– validate（）。

**HtmlHiddenForm.java**

package com.mkyong.common.form;
    
    import javax.servlet.http.HttpServletRequest;
    
    import org.apache.struts.action.ActionErrors;
    import org.apache.struts.action.ActionForm;
    import org.apache.struts.action.ActionMapping;
    import org.apache.struts.action.ActionMessage;
    
    public class HtmlHiddenForm extends ActionForm{
    	
    	String name;
    	
    	public String getName() {
    		return name;
    	}
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    	@Override
    	public ActionErrors validate(ActionMapping mapping,
    			HttpServletRequest request) {
    		
    	    ActionErrors errors = new ActionErrors();
    	      
    	    if( getName() == null || ("".equals(getName()))) {
    	       errors.add("common.name.err",
                      new ActionMessage("error.common.html.hidden.name.required"));
    	    }
    	      
    	    return errors;
    	}
    	
    	@Override
    	public void reset(ActionMapping mapping, HttpServletRequest request) {
    		// reset properties
    		name = "";
    	}
    
    }

## 5. JSP页面 ##

使用Struts的HTML标签**<html：hidden>**创建一个HTML隐藏值。

**hidden.jsp**

Struts html:hidden example

隐藏字段，请从源文件查看。

从ActionForm获取隐藏值并显示它

**display.jsp**

Hidden value :

## 6. struts-config.xml ##

创建一个Struts配置文件并将其链接在一起。

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE struts-config PUBLIC 
    "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN" 
    "http://jakarta.apache.org/struts/dtds/struts-config_1_3.dtd">
    
    <struts-config>
    
    	<form-beans>
    		<form-bean
    			name="htmlHiddenForm"
    			type="com.mkyong.common.form.HtmlHiddenForm"/>
    	
    	</form-beans>
    
    	<action-mappings>
    	
    	    <action
    			path="/HiddenPage"
    			type="org.apache.struts.actions.ForwardAction"
    			parameter="/pages/hidden.jsp"/>
    	
    		<action
    			path="/Hidden"
    			type="com.mkyong.common.action.HtmlHiddenAction"
    			name="htmlHiddenForm"
    			validate="true"
    			input="/pages/hidden.jsp"
    			>	
    			
    			<forward name="success" path="/pages/display.jsp"/>
    		</action>
    	</action-mappings>
    
    	<message-resources
    		parameter="com.mkyong.common.properties.Common" />
    
    </struts-config>

## 7. web.xml ##

最后一步，为Strut框架集成创建一个web.xml。

<!DOCTYPE web-app PUBLIC
     "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
     "http://java.sun.com/dtd/web-app_2_3.dtd" >
    
    <web-app>
      <display-name>Maven Struts Examples</display-name>
      
      <servlet>
        <servlet-name>action</servlet-name>
        <servlet-class>
            org.apache.struts.action.ActionServlet
        </servlet-class>
        <init-param>
            <param-name>config</param-name>
            <param-value>
             /WEB-INF/struts-config.xml
            </param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
      </servlet>
        
      <servlet-mapping>
           <servlet-name>action</servlet-name>
           <url-pattern>*.do</url-pattern>
      </servlet-mapping>
    
    </web-app>

访问它

> http：// localhost：8080 / StrutsExample / HiddenPage.do

![Struts-hidden-value-example1][]![Struts-hidden-value-example1][Struts-hidden-value-example1 1]

**hidden.jsp** HTML源代码。

Struts html:hidden example

隐藏字段，请从源文件查看。

按下提交按钮，它将前进到

> http：// localhost：8080 / StrutsExample / Hidden.do

并显示隐藏的值。

![Struts-hidden-value-example2][]![Struts-hidden-value-example2][Struts-hidden-value-example2 1]

标签： [隐藏的价值][Link 1] [Struts][]

> 翻译自: [https://mkyong.com/struts/struts-htmlhidden-hidden-value-example/][https_mkyong.com_struts_struts-htmlhidden-hidden-value-example]

[Struts-HiddenValue-Example.zip]: http://www.mkyong.com/wp-content/uploads/2010/04/Struts-HiddenValue-Example.zip
[Struts-hidden-value-folder]: http://imgconvert.csdnimg.cn/aHR0cDovL3d3dy5ta3lvbmcuY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDEwLzA0L1N0cnV0cy1oaWRkZW4tdmFsdWUtZm9sZGVyLmpwZw?x-oss-process=image/format,png
[Struts-hidden-value-folder 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly93d3cubWt5b25nLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMC8wNC9TdHJ1dHMtaGlkZGVuLXZhbHVlLWZvbGRlci5qcGc?x-oss-process=image/format,png
[Struts-hidden-value-example1]: http://imgconvert.csdnimg.cn/aHR0cDovL3d3dy5ta3lvbmcuY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDEwLzA0L1N0cnV0cy1oaWRkZW4tdmFsdWUtZXhhbXBsZTEuanBn?x-oss-process=image/format,png
[Struts-hidden-value-example1 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly93d3cubWt5b25nLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMC8wNC9TdHJ1dHMtaGlkZGVuLXZhbHVlLWV4YW1wbGUxLmpwZw?x-oss-process=image/format,png
[Struts-hidden-value-example2]: http://imgconvert.csdnimg.cn/aHR0cDovL3d3dy5ta3lvbmcuY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDEwLzA0L1N0cnV0cy1oaWRkZW4tdmFsdWUtZXhhbXBsZTIuanBn?x-oss-process=image/format,png
[Struts-hidden-value-example2 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly93d3cubWt5b25nLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMC8wNC9TdHJ1dHMtaGlkZGVuLXZhbHVlLWV4YW1wbGUyLmpwZw?x-oss-process=image/format,png
[Link 1]: https://mkyong.com/tag/hidden-value/
[Struts]: https://mkyong.com/tag/struts/
[https_mkyong.com_struts_struts-htmlhidden-hidden-value-example]: https://mkyong.com/struts/struts-htmlhidden-hidden-value-example/