Struts2的文件下传注意点总结

Struts2的文件上传注意点总结

1. 表单的enctype属性要设置为multipart/form-data

 

<form action="upload.action" method="post" enctype="multipart/form-data">
    选择文件：<input type="file" name="upload" /><br><input value="上传" type="submit" />
</form>

 

 2. 修改web.xml文件的配置

 

 <!-- 定义Struts2的核心Filter -->
     <filter>
         <filter-name>struts</filter-name>
         <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
     </filter>
 <!-- 定义Struts2核心Filter拦截的URL -->
     <filter-mapping>
         <filter-name>struts</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
 <!-- 如果不加的话，会发生第一次上传取不到文件的情况 -->
     <filter>
         <filter-name>struts-cleanup</filter-name>
         <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
     </filter>
     <filter-mapping>
         <filter-name>struts-cleanup</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>