jsf服务器端验证用户输入

浏览数：20 / 时间：2015年06月09日

服务器端验证用户输入数据步骤

1 html页面上插入要输入数据控件

<h:inputText size="10" 
value="#{commodityBean.foradd.name}"
                        id="input1">
                        <f:validator validatorId="input1Validator" 
/>
                    </h:inputText> <h:message for="input1"></h:message>

　　这里要用input1Validator验证inputText控件的数值。然后结果用message形式返回。真正验证的逻辑端在服务端执行。

2 在web-info文件夹下的face-config.xml里面写入

<validator>  
<validator-id>  
input1Validator
</validator-id>  
<validator-class>  
com.fujitsu.softbg.zl.input1Validator
</validator-class>  
</validator> 

　　通知服务器制动去找com.fujitsu.softbg.zl文件夹下的input1Validator.java文件。

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);
          }
             
    }
}