structs 类型转换-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_20054/article/details/81992729

本文介绍了一个使用Struts2框架处理日期输入的例子。通过自定义转换器实现日期格式的解析和格式化，确保了日期数据的正确处理。文章详细展示了web配置、页面代码及后端逻辑。

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date.jsp webroot/jsp

<%@page contentType="text/html;charset=utf-8" pageEncoding="utf-8" %>
<%@taglib uri="/struts-tags" prefix="s"  %>
<%@taglib uri="/struts-dojo-tags" prefix="sx" %>
<html>
 <head>
  <sx:head/>
 </head>
<body>
 <s:property value="date"/>
 <s:form action="DateAction" namespace="/test">
   <s:textfield name="date" title="yyyy-MM-dd HH:mm:ss"></s:textfield>
 <s:submit />
 </s:form>
 </body>

</html>

web.xml


  <filter>
  	<filter-name>struts2</filter-name>
  	<filter-class>
  		org.apache.struts2.dispatcher.FilterDispatcher
  	</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>struts2</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>


DateAction-conversion.properties

date =com.zyl.test.converter.DateConverter

struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" 

"http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
 <package name="test" 
     namespace="/test" 
     extends="struts-default">

    <action name="DateAction" class="com.zyl.servletapi.DateAction">
      <result>/jsp/date.jsp</result>
      <result name="input">/jsp/date.jsp</result>
    </action>
</struts>    


DateAction.java


package com.zyl.servletapi;

import java.util.Date;

import com.opensymphony.xwork2.ActionSupport;

public class DateAction extends ActionSupport {

	private Date date;

	public Date getDate() {
		return date;
	}

	public void setDate(Date date) {
		this.date = date;
	}

	public String execute(){

		return "success";
	}


}


DateConverter.java


package com.zyl.test.converter;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;

import org.apache.struts2.util.StrutsTypeConverter;

public class DateConverter extends StrutsTypeConverter {

	private static String[] availableDateFormat = new String[] {
			"yyyy/MM/dd HH:mm:ss", "yyyy-MM-dd HH:mm:ss" };

	private static SimpleDateFormat[] sdf = new SimpleDateFormat[] {
			new SimpleDateFormat(availableDateFormat[0]),
			new SimpleDateFormat(availableDateFormat[1]) };

	@Override
	public Object convertFromString(Map context, String[] paramFromBrowser,
			Class targetClass) {

		if (java.util.Date.class == targetClass) {
			java.util.Date date = null;

			String dateString = paramFromBrowser[0];

			for (SimpleDateFormat dateFormatter : sdf) {

				try {
					date = dateFormatter.parse(dateString);
				} catch (Exception e) {
				}

			}
			if (date == null)
				return new java.util.Date();
			else
				return date;

		}
		return null;

	}

	@Override
	public String convertToString(Map arg0, Object source) {
		String dateString = "";
		if (source instanceof java.util.Date) {
			Date date = (Date)source;

			for (SimpleDateFormat dateFormatter : sdf) {

				try {
					dateString = dateFormatter.format(date);
				} catch (Exception e) {
				}

			}

		}
		return dateString;
	}

}