根据文件名取文件【含相对路径和绝对路径处理】

   /**
     * 根据文件名取文件【含相对路径和绝对路径处理】
     * @param inputfile
     * @return
     */
    public static File getFileByFileName(String inputfile){
        File inFile = null;
        String separator = System.getProperty("file.separator");
        if("\\".equals(separator)){
            //windows版本
            if(inputfile.indexOf(":") > 0){
                inFile = new File(inputfile);
            }else{
                File file = new File("");
                String currFilePath = file.getAbsolutePath()+"\\";
                inFile = new File(currFilePath+inputfile);
            }
        }else{
            //unix版本
            if(inputfile.startsWith("/")){
                inFile = new File(inputfile);
            }else{
                File file = new File("");
                String currFilePath = file.getAbsolutePath()+"/";
                inFile = new File(currFilePath+inputfile);
            }
        }
       
        System.out.print("\n currFilePath: " + inFile.getAbsolutePath());
        return inFile;
    }