public <T> void saveFile(List<T> list, String outFile) throws IOException {        if (list == null || list.isEmpty()) {            return;        }        if (StringUtils.isEmpty(outFile)) {            throw new IllegalArgumentException("outfile is null");        }        boolean isFirst = true;        BufferedWriter out = null;        try {            out = new BufferedWriter(new FileWriter(outFile));            for (T t : list) {                StringBuilder sb1 = new StringBuilder();                StringBuilder sb2 = new StringBuilder();                Class clazz = (Class) t.getClass();                Field[] fs = clazz.getDeclaredFields();                for (int i = 0; i < fs.length; i++) {                    Field f = fs[i];                    f.setAccessible(true);                    try {                        if (isFirst) {                            sb1.append(f.getName());                            sb1.append(",");                        }                        Object val = f.get(t);                        if (val == null) {                            sb2.append("");                        } else {                            sb2.append(val.toString());                        }                        sb2.append(",");                    } catch (IllegalArgumentException | IllegalAccessException e) {                        e.printStackTrace();                    }                }                if (isFirst) {                    out.write(sb1.toString());                    isFirst = false;                    out.newLine();                }                out.write(sb2.toString());                out.newLine();            }        } catch (IOException e1) {            throw e1;        } finally {            try {                if (out != null) {                    out.close();                }            } catch (IOException e2) {                throw e2;            }        }    }