struts2上传文件往底下看一点
平时都是直接在action中按照struts2定义的格式来接流,最近看到华为技术人员调用struts2底层方法对文件流做了封装,感觉有用赶紧记了下来

public void preExecute()    {        if (httpServletRequest instanceof MultiPartRequestWrapper)        {            MultiPartRequestWrapper requestWrapper = (MultiPartRequestWrapper) httpServletRequest;            Enumeration<String> parameterNames = requestWrapper.getFileParameterNames();            while (parameterNames.hasMoreElements())            {                @SuppressWarnings("unused")                String paramterName = parameterNames.nextElement();                File[] files = requestWrapper.getFiles(paramterName);                if (null == files || files.length == 0)                {                    continue;                }                else if (files.length == 1)                {                    FileBean fileBean = new FileBean();                    fileBean.setAbsolutePath(files[0].getAbsolutePath());                    fileBean.setFileSize(files[0].length());                    fileBean.setFilename(requestWrapper.getFileNames(paramterName)[0]);                    this.fileMap.put(paramterName, fileBean);                }                else                {                    ArrayList<FileBean> list = new ArrayList();                    for (int i = 0; i < files.length; i++)                    {                        File file = files[i];                        FileBean fileBean = new FileBean();                        fileBean.setAbsolutePath(file.getAbsolutePath());                        fileBean.setFileSize(file.length());                        fileBean.setFilename(requestWrapper.getFileNames(paramterName)[i]);                        list.add(fileBean);                    }                    this.fileMap.put(paramterName, list);                }            }        }    }