java 字符串转ascii码 java字符串转decimal

BigDecimal类

public BigDecimal stringToBigDecimal(String stringBigdecimal) {
    if (StringUtils.isBlank(stringBigdecimal)) {
        return BigDecimal.ZERO;
    }
    return new BigDecimal(stringBigdecimal).setScale(2, 4);
}

List

/**
 * 字符串值转化为 List<Integer>
 *
 * @param stringValue 字符串
 * @return List<Integer>
 */
public List<Integer> stringSplitToIntegerList(String stringValue) {
    if (StringUtils.isBlank(stringValue)) {
        return new ArrayList<>();
    }
    return Arrays.stream(stringValue.split(","))
            .filter(StringUtils::isNotBlank)
            .map(Integer::valueOf)
            .collect(Collectors.toList());
}

/**
 * 字符串值转化为 List<Integer>
 *
 * @param stringValue 字符串
 * @return List<Integer>
 */
public List<String> stringSplitToStringList(String stringValue) {
    if (StringUtils.isBlank(stringValue)) {
        return new ArrayList<>();
    }
    return Arrays.stream(stringValue.split(","))
            .filter(StringUtils::isNotBlank)
            .collect(Collectors.toList());
}


/**
 * List<Integer> 转化为字符串
 *
 * @param integerList
 * @return
 */
public String integerListToString(List<Integer> integerList) {
    if (integerList == null || integerList.isEmpty()) {
        return "";
    }
    String collect = integerList
            .stream()
            .filter(Objects::nonNull)
            .map(String::valueOf)
            .collect(Collectors.joining(","));
    return Strings.nullToEmpty(collect);
}

/**
 * List<String> 转化为字符串
 *
 * @param integerList
 * @return
 */
public String stringListToString(List<String> integerList) {
    if (integerList == null || integerList.isEmpty()) {
        return "";
    }
    String collect = integerList
            .stream()
            .filter(Objects::nonNull)
            .collect(Collectors.joining(","));
    return Strings.nullToEmpty(collect);
}