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JSF教程 – JSF验证要求示例
以下代码显示如何根据需要标记字段。
例子
下面的代码来自UserBean.java。
package cn.w3cschool.common;
import java.io.Serializable;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
@ManagedBean(name="user")
@SessionScoped
public class UserBean implements Serializable{
String password;
String confPassword;
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getConfPassword() {
return confPassword;
}
public void setConfPassword(String confPassword) {
this.confPassword = confPassword;
}
}
以下代码来自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:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core"
>
<h:body>
<h:panelGrid columns="2">
Password : <h:outputText value="#{user.password}" />
Confirm Password : <h:outputText value="#{user.confPassword}" />
</h:panelGrid>
</h:body>
</html>
以下代码来自demo.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:body>
<h:form>
<h:panelGrid columns="3">
Enter your password :
<h:inputSecret id="password" value="#{user.password}"
size="20" required="true"
label="Password" />
<h:message for="password" style="color:red" />
Enter your password again :
<h:inputSecret id="confPassword" value="#{user.confPassword}"
size="20" required="true"
label="Confirm Password">
<f:validateRequired />
</h:inputSecret>
<h:message for="confPassword" style="color:red" />
</h:panelGrid>
<h:commandButton value="Submit" action="result" />
</h:form>
</h:body>
</html>
下载 Validation_Required.zip
运行
将生成的WAR文件从目标文件夹复制到Tomcat部署文件夹，并运行Tomcat-Install-folder/bin/startup.bat。
Tomcat完成启动后，在浏览器地址栏中键入以下URL。
http://localhost:8080/simple-webapp/demo.xhtml
