Struts 单选选项示例

拼搏现实的明天。 2023-02-15 05:29 12阅读 0赞

> 下载此Struts广播选项示例– [Struts-Radio-Example.zip][]

在这个Struts示例中，您将学习如何使用Struts <html：radio>标签创建HTML单选选项。

## 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-radio-folder][]![Struts-radio-folder][Struts-radio-folder 1]

## 2.动作课 ##

创建一个Action类，只转发请求。

**HtmlRadioAction.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;
    
    import com.mkyong.common.form.HtmlRadioForm;
    
    public class HtmlRadioAction extends Action{
    	
    	public ActionForward execute(ActionMapping mapping,ActionForm form,
    			HttpServletRequest request,HttpServletResponse response) 
            throws Exception {
    		
    		HtmlRadioForm htmlRadioForm = (HtmlRadioForm)form;
    		
    		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.radio.required = Please select a radio option.
    
    #label message
    label.common.html.radio.name = Select Sex
    label.common.html.radio.sex.male = Male
    label.common.html.radio.sex.female = Female
    label.common.html.radio.button.submit = Submit
    label.common.html.radio.button.reset = Reset

## 4. ActionForm ##

创建一个ActionForm，其中包含用于单选选项和表单验证的性别变量– validate（）。

**HtmlRadioForm.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 HtmlRadioForm extends ActionForm{
    	
    	String sex;
    	
    	public String getSex() {
    		return sex;
    	}
    
    	public void setSex(String sex) {
    		this.sex = sex;
    	}
    
    	@Override
    	public ActionErrors validate(ActionMapping mapping,
    		HttpServletRequest request) {
    		
    	    ActionErrors errors = new ActionErrors();
    	      
    	    if( getSex() == null || ("".equals(getSex())))
    	    {
    	       errors.add("common.radio.err",
    	    	  new ActionMessage("error.common.html.radio.required"));
    	    }
    	      
    	    return errors;
    	}
    	
    	@Override
    	public void reset(ActionMapping mapping, HttpServletRequest request) {
    		// reset properties
    		sex = "";
    	}
    }

## 5. JSP页面 ##

使用Struts的HTML标签<html：radio>创建HTML单选选项。

**radio.jsp**

Struts html:radio example

：

从htmlRadioForm表单获取单选选项值并显示它

**display.jsp**

Your selected value is :

## 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="htmlRadioForm"
    			type="com.mkyong.common.form.HtmlRadioForm"/>
    	
    	</form-beans>
    
    	<action-mappings>
    	
    	        <action
    			path="/RadioPage"
    			type="org.apache.struts.actions.ForwardAction"
    			parameter="/pages/radio.jsp"/>
    	
    		<action
    			path="/Radio"
    			type="com.mkyong.common.action.HtmlRadioAction"
    			name="htmlRadioForm"
    			validate="true"
    			input="/pages/radio.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，创建一个web.xml并集成Struts框架。

<!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 / RadioPage.do

![Struts-radio-example1][]![Struts-radio-example1][Struts-radio-example1 1]

选择性别并按下“提交”按钮，它将转发至

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

并显示选择单选选项。

![Struts-radio-example2][]![Struts-radio-example2][Struts-radio-example2 1]

标签： [单选按钮][Link 1] [Struts][]

> 翻译自: [https://mkyong.com/struts/struts-htmlradio-radio-option-example/][https_mkyong.com_struts_struts-htmlradio-radio-option-example]

[Struts-Radio-Example.zip]: http://www.mkyong.com/wp-content/uploads/2010/04/Struts-Radio-Example.zip
[Struts-radio-folder]: http://imgconvert.csdnimg.cn/aHR0cDovL3d3dy5ta3lvbmcuY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDEwLzA0L1N0cnV0cy1yYWRpby1mb2xkZXIuanBn?x-oss-process=image/format,png
[Struts-radio-folder 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly93d3cubWt5b25nLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMC8wNC9TdHJ1dHMtcmFkaW8tZm9sZGVyLmpwZw?x-oss-process=image/format,png
[Struts-radio-example1]: http://imgconvert.csdnimg.cn/aHR0cDovL3d3dy5ta3lvbmcuY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDEwLzA0L1N0cnV0cy1yYWRpby1leGFtcGxlMS5qcGc?x-oss-process=image/format,png
[Struts-radio-example1 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly93d3cubWt5b25nLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMC8wNC9TdHJ1dHMtcmFkaW8tZXhhbXBsZTEuanBn?x-oss-process=image/format,png
[Struts-radio-example2]: http://imgconvert.csdnimg.cn/aHR0cDovL3d3dy5ta3lvbmcuY29tL3dwLWNvbnRlbnQvdXBsb2Fkcy8yMDEwLzA0L1N0cnV0cy1yYWRpby1leGFtcGxlMi5qcGc?x-oss-process=image/format,png
[Struts-radio-example2 1]: http://imgconvert.csdnimg.cn/aHR0cHM6Ly93d3cubWt5b25nLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMC8wNC9TdHJ1dHMtcmFkaW8tZXhhbXBsZTIuanBn?x-oss-process=image/format,png
[Link 1]: https://mkyong.com/tag/radio-button/
[Struts]: https://mkyong.com/tag/struts/
[https_mkyong.com_struts_struts-htmlradio-radio-option-example]: https://mkyong.com/struts/struts-htmlradio-radio-option-example/