JSF-f：validateDoubleRange

f：validateDoubleRangeタグは、値をfloat値の範囲に対して検証するために使用されます。

JSFタグ

<f:validateDoubleRange minimum = "1000.50" maximum = "10000.50"/>

タグ属性

S.No

Attribute & Description

1

minimum

オプションの範囲内の最小の長い値

2

maximum

オプションの範囲内の最大長値

応用例

上記のタグをテストするテストJSFアプリケーションを作成しましょう。

Step	Description
1	Create a project with a name helloworld under a package com.finddevguides.test as explained in the JSF - First Application chapter.
2	Modify home.xhtml as explained below. Keep the rest of the files unchanged.
3	Create result.xhtml in the webapps directory as explained below.
4	Create UserData.java as a managed bean under package com.finddevguides.test as explained below.
5	Compile and run the application to make sure the business logic is working as per the requirements.
6	Finally, build the application in the form of war file and deploy it in Apache Tomcat Webserver.
7	Launch your web application using appropriate URL as explained below in the last step.

UserData.java

package com.finddevguides.test;

import java.io.Serializable;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

@ManagedBean(name = "userData", eager = true)
@SessionScoped
public class UserData implements Serializable {
   private static final long serialVersionUID = 1L;
   private double salary;

   public double getSalary() {
      return salary;
   }

   public void setSalary(double salary) {
      this.salary = salary;
   }
}

home.xhtml

<?xml version = "1.0" encoding = "UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns = "http://www.w3.org/1999/xhtml"
   xmlns:h = "http://java.sun.com/jsf/html"
   xmlns:f = "http://java.sun.com/jsf/core">

   <h:head>
      <title>JSF tutorial</title>
   </h:head>

   <h:body>
      <h2>h:validateDoubleRange Example</h2>

      <h:form>
         <h:inputText id = "salaryInput" value = "#{userData.salary}"
            label = "salary" >
            <f:validateDoubleRange minimum = "1000.50" maximum = "10000.50"/>
         </h:inputText>
         <h:commandButton value = "submit" action = "result"/>
         <h:message for = "salaryInput" style = "color:red"/>
      </h:form>

   </h:body>
</html>

result.xhtml

<?xml version = "1.0" encoding = "UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns = "http://www.w3.org/1999/xhtml"
   xmlns:f = "http://java.sun.com/jsf/core"
   xmlns:h = "http://java.sun.com/jsf/html">

   <h:head>
      <title>JSF Tutorial!</title>
   </h:head>

   <h:body>
      <h2>Result</h2>
      Salary: #{userData.salary}
   </h:body>
</html>

すべての変更を完了したら、JSF-最初のアプリケーションの章で行ったようにアプリケーションをコンパイルして実行します。すべてがアプリケーションで問題ない場合、次の結果が生成されます。

JSF f：validateDoubleRange

無効な値を入力してください。出力は次のようになります。

JSF f：validateDoubleRange1

有効な値を入力してください。出力は次のようになります。

JSF f：validateDoubleRange2

Jsf-validatedoublerange-tag

目次