jsf服务器端验证用户输入

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<h:inputText size="10"
value="#{commodityBean.foradd.name}"

                        id="input1">

                        <f:validator validatorId="input1Validator"
/>

                    </h:inputText> <h:message for="input1"></h:message>

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<validator> 

<validator-id> 

input1Validator

</validator-id> 

<validator-class> 

com.fujitsu.softbg.zl.input1Validator

</validator-class> 

</validator>

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package
com.fujitsu.softbg.zl;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import javax.faces.application.FacesMessage;

import javax.faces.component.UIComponent;

import javax.faces.context.FacesContext;

import javax.faces.validator.Validator;

import
javax.faces.validator.ValidatorException;

public
class input1Validator implements
Validator {

    @Override

    public
void validate(FacesContext arg0, UIComponent arg1, Object arg2)

            throws
ValidatorException {

        // TODO Auto-generated method stub

        String inputvalue=arg2.toString();

           String regEx="[0-9.]+";//表示一个或多个数字

           Pattern p=Pattern.compile(regEx); //编译成模式

          Matcher m=p.matcher(inputvalue); //创建一个匹配器

          boolean
rs=m.matches();

          if(!rs){

              FacesMessage message = new
FacesMessage(

                    FacesMessage.SEVERITY_ERROR, "not a vaild number",

                    "not a vaild number");

            throw
new ValidatorException(message);

          }

    }

}