java - Struts 2 模型驱动的负整数

Question

如何将负数（-123 或 -123.00）分配给 ModelDriven bean （实现 ModelDriven< Bean >）。 当我尝试通过该操作的请求传递值时，它会抛出异常

Fri Aug 10 18:45:27 IST 2012 unable to convert value using type converter [com.opensymphony.xwork2.conversion.impl.XWorkBasicConverter]
Overflow or underflow casting: "-123.12" into class java.lang.Double - [unknown location]
    at com.opensymphony.xwork2.conversion.impl.XWorkBasicConverter.doConvertToNumber(XWorkBasicConverter.java:406)
    at com.opensymphony.xwork2.conversion.impl.XWorkBasicConverter.doConvertToNumber(XWorkBasicConverter.java:415)
    at com.opensymphony.xwork2.conversion.impl.XWorkBasicConverter.convertValue(XWorkBasicConverter.java:118)