這是因為struts2的過濾器，解決方法是自定義一個過濾器

新建一個過濾器的類，程式碼：

  package com.filter;
  
  import java.io.IOException;
  
  import javax.servlet.FilterChain;
  import javax.servlet.ServletException;
  import javax.servlet.ServletRequest;
  import javax.servlet.ServletResponse;
  import javax.servlet.http.HttpServletRequest;
 
 import org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter;
 
 public class EditorStrutsFilter extends StrutsPrepareAndExecuteFilter{
     public void doFilter(ServletRequest req, ServletResponse res,
             FilterChain chain) throws IOException, ServletException {
         HttpServletRequest request = (HttpServletRequest) req;
         String url = request.getRequestURI();        
         System.out.println(url);        
         if (url.contains("/jsp/")) {            
             System.out.println("使用自定義過濾器");            
             chain.doFilter(req, res);        
         }else{            
             System.out.println("使用預設過濾器");            
             super.doFilter(req, res, chain);        
         }
     }
 

}

之後在web.xml裡面配置struts2過濾器

     <filter>
         <filter-name>struts2</filter-name>
         <filter-class>com.filter.EditorStrutsFilter</filter-class>
     </filter>
     <filter-mapping>
         <filter-name>struts2</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
 

注意，如果有

 　　<filter>
         <filter-name>struts2</filter-name>
         <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
     </filter>

要將其刪除

出現上傳錯誤是

java.lang.NoSuchMethodError: org.apache.commons.io.FileUtils.getTempDirectory()Ljava/io/File;

1：看下是否是apche的jar衝突，檢查一下是否存在多個以commons-io名稱開始的jar
2：FileUtils 引用jar是否版本不一致，其中沒有你要的方法