您的正则表达式本身说，它只接受数字.所以
使用此正则表达式.可能会对您有帮助.

your regular expression itself say its going to accept only digits. so
Use this regular expression. it may help you.

/^\d+\.?\d*

/

使用此表达式

Use this expression

[0-9]+(\.[0-9][0-9]?)?

在线检查此表达式.
http://www.regexplanet.com/advanced/java/index.html [ ^ ]

Check this expression in online itself.
http://www.regexplanet.com/advanced/java/index.html[^]