安全且区分区域设置的解析数字 [英] Parsing numbers safely and locale-sensitively

问题描述

Java 的 NumberFormat 是 1) 非线程安全的(可以使用 ThreadLocal 解决)；2) 不方便正确使用最简单的用例当我知道字符串是否应该包含 int、long 或 double 并且想要一个 API 时:

Java's NumberFormat is 1) non thread-safe (which can be worked around with a ThreadLocal); 2) inconvenient to use correctly for the simplest use case when I know whether the string should contain int, long, or double, and want an API like:

int parseInt(String str, Locale locale) throws ParseException; 
int parseInt(String str, int defaultValue, Locale locale);
long parseLong(String str, Locale locale) throws ParseException;
long parseLong(String str, long defaultValue, Locale locale);
double parseDouble(String str, Locale locale) throws ParseException;
double parseDouble(String str, double defaultValue, Locale locale);

字符串未完全解析时抛出异常的地方.显然，这样的包装器很容易编写，但我在 Guava 或 Apache Commons Lang 中找不到.我只是错过了吗?或者是否有其他或多或少的标准解决方案?

where the exception is thrown when the string isn't completely parsed. Obviously, such a wrapper is easy to write, but I couldn't find one in Guava or Apache Commons Lang. Did I just miss it? Or is there another more-or-less standard solution for this?

推荐答案

我发现的一个选项是 Apache Commons Validator(仍然是非线程安全的).

One option I've found is Apache Commons Validator (still non-thread-safe).

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