【java】String转成各种list格式

将String 转换成 List

    public static final String SEGMENTATION = ",";

    /**
     * 将String 转换成 List<Long>
     *
     * @param str
     * @return
     */
    public static List<Long> splitStrToListLong(String str) {
        List<Long> list = new ArrayList<>();
        if (StringUtils.isNotEmpty(str)) {
            String[] split = StringUtils.split(str, SEGMENTATION);
            for (String string : split) {
                list.add(NumberUtils.toLong(string, -1l));
            }
        }
        return list;
    }

    /**
     * 将String 转换成 List<Integer>
     *
     * @param str
     * @return
     */
    public static List<Integer> splitStrToListInt(String str) {
        List<Integer> list = new ArrayList<>();
        if (StringUtils.isNotEmpty(str)) {
            String[] split = StringUtils.split(str, SEGMENTATION);
            for (String string : split) {
                list.add(NumberUtils.toInt(string, -1));
            }
        }
        return list;
    }

    /**
     * 将String 转换成 List<String>
     *
     * @param str
     * @return
     */
    public static List<String> splitStrToListString(String str) {
        List<String> list = new ArrayList<>();
        if (StringUtils.isNotEmpty(str)) {
            String[] split = StringUtils.split(str, SEGMENTATION);
            for (String string : split) {
                list.add(string);
            }
        }
        return list;
    }

    /**
     * list<String>转string
     * @param list
     * @param separator
     * @return
     */
    public static String listToString(List list, char separator) {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < list.size(); i++) {
            sb.append(list.get(i)).append(separator);
        }
        return sb.toString().substring(0, sb.toString().length() - 1);
    }