字符串隐藏部分子串

字符串隐藏部分子串

  /**
     * 功能描述：*号替换
     *
     * @param obj
     * @param lengths    隐藏的长度
     * @param indexs     开始位，不传的话使用自动计算,-1为自动计算
     * @param fieldNames
     * @return void
     * @author konglcwqy
     * @date 2022/6/10 10:10
     */
    private void hide(Object obj, int[] lengths, int[] indexs, String... fieldNames) throws Exception {
        if (fieldNames.length != lengths.length) {
            return;
        }
        if (fieldNames.length != indexs.length) {
            return;
        }
        for (int i = 0; i < fieldNames.length; i++) {
            this.doHide(obj, fieldNames[i], lengths[i], indexs[i]);
        }
    }

    /**
     * 功能描述：执行隐藏
     *
     * @param obj
     * @param fieldName
     * @param length
     * @param start     开始位，不传的话使用自动计算,-1为自动计算
     * @return void
     * @author konglcwqy
     * @date 2022/6/10 10:15
     */
    private void doHide(Object obj, String fieldName, int length, int start) throws Exception {
        Field field = ListTool.getDeclaredField(obj.getClass(), fieldName);
        if (field != null) {
            if (field.getType().equals(String.class)) {
                field.setAccessible(true);
                Object value = field.get(obj);
                if (ObjectUtil.isNotEmpty(value)) {
                    String realValue = value.toString();
                    //长度小于要隐藏的长度时不进行处理
                    if (realValue.length() <= length) {
                        return;
                    }
                    StringBuilder sb = new StringBuilder();
                    for (int i = 0; i < length; i++) {
                        sb.append("*");
                    }
                    if (start == -1) {
                        start = (realValue.length() - length) / 2;
                    }
                    int end = start + length;
                    if (end >= realValue.length()) {
                        end = realValue.length() - 1;
                    }
                    realValue = realValue.substring(0, start) + sb.toString() + realValue.substring(end);
                    field.set(obj, realValue);
                }
            }
        }
    }
//使用
this.hide(mjxx, new int[]{4, 12}, new int[]{-1, 2}, "phonenumber", "zjhm");