JSF入门例子
首先去 http://java.sun.com/javaee/javaserverfaces/download.html 下载jsf的标准类库，这是sun公司发布的一套类库！当然还有apache的myfaces等，暂时先用标准的类库去操作！
用myeclipse6.0去搭建一个web的工程
然后开始编写一个登录的例子
首先编写web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>JSF</display-name>
<context-param>
<param-name>javax.faces.CONFIG_FILES</param-name>
<param-value>/WEB-INF/faces-config.xml</param-value>
</context-param>
<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>*.jsf</url-pattern>
</servlet-mapping>
</web-app>
再编写jsf的配置文件 faces-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>
<navigation-rule>
<from-view-id>/index.jsp</from-view-id>
<!-- 返回值控制跳转页面 -->
<navigation-case>
<from-outcome>success</from-outcome>
<to-view-id>/welcome.jsp</to-view-id>
</navigation-case>
<navigation-case>
<from-outcome>fail</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>
com.vincent.jsf.demo.UserBean
</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
</managed-bean>
</faces-config>
编写一个 UserBean 的类
package com.vincent.jsf.demo;
import javax.faces.event.ActionEvent;
public class UserBean {
private String name;
private String password;
private String outCome;
private String errMessage;
public void setName(String name) {
this.name = name;
}
public String getName() {
return name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getOutCome() {
return outCome;
}
public void setOutCome(String outCome) {
this.outCome = outCome;
}
public String getErrMessage() {
return errMessage;
}
public void setErrMessage(String errMessage) {
this.errMessage = errMessage;
}
public void loginIn(ActionEvent e){
System.out.println(name);
System.out.println(password);
if(name != null && name.equals("vincent")){
outCome = "success";
}else{
errMessage = "用户名错误";
outCome = "fail";
}
}
}
做两个jsp文件 index.jsp 和 welcome.jsp
<%@ page language="java" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<html>
<head>
<title>第一个JSF程序</title>
</head>
<body>
<f:view>
<h:form>
<h3>登录</h3>
名称：<h:inputText value="#{user.name}"/><p>
密码：<h:inputSecret value="#{user.password}"></h:inputSecret><p/>
<h:commandButton value="送出" actionListener="#{user.loginIn}" action="#{user.getOutCome}"/>
<font color="red"><h:outputText value="#{user.errMessage}"/></font><p>
</h:form>
</f:view>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<html>
<head>
<title>第一个JSF程序</title>
</head>
<body>
<f:view>
<h:outputText value="#{user.name}"/> 您好！
<h3>欢迎使用 JavaServer Faces！</h3>
</f:view>
</body>
</html>