public static void setAuto(XWPFDocument doc) throws SecurityException, NoSuchFieldException, IllegalArgumentException, IllegalAccessException, ClassNotFoundException{
        List<POIXMLDocumentPart> list = doc.getRelations();
        //设置一些Word文档的兼容属性
        for(POIXMLDocumentPart p:list)
        {
            if(p instanceof XWPFSettings)
            {
                XWPFSettings settings = (XWPFSettings)p;
                //反射获得ctsettings的反射对象
                Field field = null;
                //反射三种方式
//                field = settings.getClass().getDeclaredField("ctSettings");
//                field = XWPFSettings.class.getDeclaredField("ctSettings");
                field = Class.forName("org.apache.poi.xwpf.usermodel.XWPFSettings").getDeclaredField("ctSettings");
                //将私有的成员变量公有化，以便能修改。
                field.setAccessible(true);
                //生成新的Word设置类CTSettings的对象实例，设置UlTrailSpace，使得word为行尾的空格显示下划线
                CTSettings att = CTSettings.Factory.newInstance();
                att.addNewCompat().addNewUlTrailSpace().setVal(STOnOff.ON);
                //添加对象
                field.set(settings, att);
                break;
            }
        }
    }