2008-02-01

使用JSF处理表单验证

 web.xml

 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <servlet>
      <servlet-name>Faces Servlet</servlet-name>
      <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
      <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
      <servlet-name>Faces Servlet</servlet-name>
      <url-pattern>*.faces</url-pattern>
    </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

 

face-config.xml

 

<?xml version="1.0"?>
<!DOCTYPE faces-config PUBLIC
"-//Sun Microsystems, Inc.//DTD JavaServer Faces Config 1.0//EN"
"http://java.sun.com/dtd/web-facesconfig_1_0.dtd">
<faces-config>
   <application>
   
     <locale-config>
       <default-locale>en</default-locale>
       <supported-locale>zh_CN</supported-locale>
     </locale-config>
   </application>
  <navigation-rule>
     <from-view-id>/index.jsp</from-view-id>
     <navigation-case>
           <from-outcome>success</from-outcome>
           <to-view-id>/welcome.jsp</to-view-id>
     </navigation-case>
      <navigation-case>
           <from-outcome>failure</from-outcome>
           <to-view-id>/index.jsp</to-view-id>
     </navigation-case>
   </navigation-rule>
   
   <managed-bean>
       <managed-bean-name>user</managed-bean-name>
       <managed-bean-class>test.UserBean</managed-bean-class>
       <managed-bean-scope>session</managed-bean-scope> 
   </managed-bean>
</faces-config>

 

JavaBean:

package test;

public class UserBean {
   private String username;
   private String password;
   private String errorMessage;
   private String locale;
   public String getLocale() {
    return locale;
}
public void setLocale(String locale) {
    this.locale = locale;
}
public String verify() {
       if(!username.equals("admin") ||
                !password.equals("123456")) {
           errorMessage = "名称或密码错误";
           return "failure";
       }
       else {
           return "success";
       }
       }

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

public String getErrorMessage() {
    return errorMessage;
}

public void setErrorMessage(String errorMessage) {
    this.errorMessage = errorMessage;
}

public String getUsername() {
    return username;
}

public void setUsername(String username) {
    this.username = username;
}
}

 

index.jsp

 

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
    <f:view>
        <h:form>
            <h:selectOneRadio value="#{user.locale}">
                <f:selectItem itemValue="zh_CN" itemLabel="中国" />
                <f:selectItem itemValue="en" itemLabel="英国" />
            </h:selectOneRadio>
         <h:messages layout="table" style="color:red"/>    
         <h3>请输入您的名称</h3>
         <font color="red"><h:outputText value="#{user.errorMessage}"/><p></font>
          名称: <h:inputText value="#{user.username}" required="true" requiredMessage="名称必须输入"/><p>
          密码: <h:inputSecret value="#{user.password}" required="true" requiredMessage="密码必须输入" validatorMessage="长度必须大于6位">
                 <f:validateLength minimum="6"/>
              </h:inputSecret><p>
         <h:commandButton value="送出" action="#{user.verify}"/>
       </h:form>
    </f:view>
  </body>
</html>

 

welcome.jsp

 

<%@ page language="java" import="java.util.*" pageEncoding="gb2312"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h" %>

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