我正在gwt中进行验证。我有文本框，只允许整数和小数值。我使用正则表达式模式，如^[0-9.]+$。它工作正常。但当我输入像.这样的单点时，它接受了。如何在上面的正则表达式模式上限制单点？
答案 0 :(得分：0)
^[0-9]+([.][0-9]+)?$
所以是一系列数字，可选地后跟一个句号和一系列数字。
答案 1 :(得分：0)
怎么样：
^\d+(?:\.\d+)?$
它将匹配整数或十进制数。
<强>解释
The regular expression:
(?-imsx:^\d+(?:\.\d+)?$)
matches as follows:
NODE EXPLANATION
----------------------------------------------------------------------
(?-imsx: group, but do not capture (case-sensitive)
(with ^ and $ matching normally) (with . not
matching \n) (matching whitespace and #
normally):
----------------------------------------------------------------------
^ the beginning of the string
----------------------------------------------------------------------
\d+ digits (0-9) (1 or more times (matching
the most amount possible))
----------------------------------------------------------------------
(?: group, but do not capture (optional
(matching the most amount possible)):
----------------------------------------------------------------------
\. '.'
----------------------------------------------------------------------
\d+ digits (0-9) (1 or more times (matching
the most amount possible))
----------------------------------------------------------------------
)? end of grouping
----------------------------------------------------------------------
$ before an optional \n, and the end of the
string
----------------------------------------------------------------------
) end of grouping
----------------------------------------------------------------------
答案 2 :(得分：0)
对于我们的GWT项目，我们使用Hibernate验证器和注释，如
@DecimalMax(value = "9999999.99")
@DecimalMin(value = "0.01")
private BigDecimal amount;
而不是正则表达式。