struts2上传

1.使用struts2上传文件时报错：

 

Unable to find 'struts.multipart.saveDir' property setting. Defaulting to javax.servlet.context.tempdir

 提示该 struts.multipart.saveDir属性没有找到，

在struts.xml配置文件中增加如下配置即可：

 

<constant name="struts.multipart.saveDir" value="/upload/temp"/>

 

作用是设置临时文件上传路径。

2.上传时为了避免中文乱码：

 

<?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>
	<!-- 设置使用的解码集 -->
 	<constant name="struts.i18n.encoding" value="GBK"/>
	<package name="qs" extends="struts-default" namespace="/administrate">
		<action name="aaxcel" class="cd.xf.action.QuestionAction" method="aaxcel">
			<param name="saveDir">C:\upload\</param>
			<result name="success">/index.jsp</result>
		</action>
	</package>
</struts>    

 

 3.web.xml中

 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  	<filter-name>struts2</filter-name>
  	<filter-class>
  		org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  	</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>struts2</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  <!-- 配置Struts2的CleanUp的Filter -->
  <filter> 
      <filter-name>struts-cleanup</filter-name> 
      <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class> 
  </filter>
  <!-- 定义Struts2的CleanUp Filter拦截的URL -->
  <filter-mapping>
      <filter-name>struts-cleanup</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>

 

4.上传的时候

页面中：

 

<form action="administrate/aaxcel.action" method="post" enctype="multipart/form-data">
    				导入Excel数据
    				<input type="file" name="upload"><div id="uploadmessage"></div>
    				<input type="file" name="upload"><div id="uploadmessage"></div>
    				<br>
    				<input type="submit" value=" 提交 ">
    			</form>

 Action中

上传一个文件时：

 

public class QuestionAction extends ActionSupport implements ServletRequestAware {
	@Resource
	private QuestionService questionService;
	private HttpServletRequest request;
	private File upload;
	private String uploadContentType;
	private String uploadFileName;

 

上传多个文件时（将几个属性封装成对应的数组形式即可）：

 

public class QuestionAction extends ActionSupport implements ServletRequestAware {
	@Resource
	private QuestionService questionService;
	private HttpServletRequest request;
	private File [] upload;
	private String [] uploadContentType;
	private String [] uploadFileName;
......................

 注意红色的部分，必须要一致才行，不然后台接收不到上传的文件

 

5.配置限制上传文件的大小

在struts.xml中

<constant name="struts.multipart.maxSize" value="10701096"/> //最大上传配置成10M 
    默认的上传大小为2M