学习javaeetutorial6.pdf 106页到113页 附件中javaeetutorial6.zip
环增需求：JDK1.6??? 服务器:tomcat6.0.29? web项目?? 框架:JSF2.0
简单描述：项目启动后，进入欢迎界面faces/greeting.xhtml
?<welcome-file-list>
??????? <welcome-file>faces/greeting.xhtml</welcome-file>
???</welcome-file-list>
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被
Servlet
?<servlet-mapping>
??????? <servlet-name>Faces Servlet</servlet-name>
??????? <url-pattern>/faces/*</url-pattern>
??? </servlet-mapping>
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交给JSF处理
进入faces-config.xml的配置
/greeting.xhtml
<navigation-rule>
??? <description>
??????? The decision rule used by the NavigationHandler to
??????? determine which view must be displayed after the
??????? current view, greeting.jsp is processed.
??? </description>
??? <from-view-id>/greeting.xhtml</from-view-id>
??? <navigation-case>
??????? <description>
??????????? Indicates to the NavigationHandler that the response.jsp
??????????? view must be displayed if the Action referenced by a
??????????? UICommand component on the greeting.jsp view returns
??????????? the outcome "success".
??????? </description>
????? <from-outcome>success</from-outcome>
????? <to-view-id>/response.xhtml</to-view-id>
??? </navigation-case>
? </navigation-rule>
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由于请求的操作，应该action默认的不是success 即<from-outcome>success</from-outcome>
不符合，所以直接返回请求页面/greeting.xhtml
进入开始页面，
<managed-bean>
??? <description>
????? The backing bean that backs up the guessNumber Web application
??? </description>
??? <managed-bean-name>UserNumberBean</managed-bean-name>
??? <managed-bean-class>guessNumber.UserNumberBean</managed-bean-class>
??? <managed-bean-scope>session</managed-bean-scope>
??? <managed-property>
????? <property-name>minimum</property-name>
????? <property-class>long</property-class>
????? <value>0</value>
??? </managed-property>
??? <managed-property>
????? <property-name>maximum</property-name>
????? <property-class>long</property-class>
????? <value>10</value>
??? </managed-property>
? </managed-bean>
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配的是Session作用域，所以每次请求的，bean只有第一次会被实例化(无参构造函数生成的随机数就被确定了，以后的请求这这个值是不会改变的),然后是返回结果页面response.xhtml只显示Bean中的UserNumberBean.response，如果用户输的value等于随机数就显示猜对了，否则显示猜错了。。
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JSF的一个简单例子:
说明:
Web\WEB-INF\web.xml配置
<!--上下文参数-->
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<!--servlet路径拦截-->
<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>
<!--session的生命周期-->
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<!--欢迎页面-->
<welcome-file-list>
<welcome-file>faces/greeting.xhtml</welcome-file>
</welcome-file-list>
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Web\WEB-INF\faces-config.xml配置
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<!-- =========== FULL CONFIGURATION FILE ================================== -->
<faces-config 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-facesconfig_2_0.xsd"
version="2.0">
<application>
<resource-bundle>
<base-name>guessNumber.ApplicationMessages</base-name>
<var>ErrMsg</var>
</resource-bundle>
<locale-config>
<default-locale>en</default-locale>
</locale-config>
</application>
<managed-bean>
<description>
The backing bean that backs up the guessNumber Web application
</description>
<managed-bean-name>UserNumberBean</managed-bean-name>
<managed-bean-class>guessNumber.UserNumberBean</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
<property-name>minimum</property-name>
<property-class>long</property-class>
<value>0</value>
</managed-property>
<managed-property>
<property-name>maximum</property-name>
<property-class>long</property-class>
<value>10</value>
</managed-property>
</managed-bean>
<navigation-rule>
<description>
The decision rule used by the NavigationHandler to
determine which view must be displayed after the
current view, greeting.jsp is processed.
</description>
<from-view-id>/greeting.xhtml</from-view-id>
<navigation-case>
<description>
Indicates to the NavigationHandler that the response.jsp
view must be displayed if the Action referenced by a
UICommand component on the greeting.jsp view returns
the outcome "success".
</description>
<from-outcome>success</from-outcome>
<to-view-id>/response.xhtml</to-view-id>
</navigation-case>
</navigation-rule>
<navigation-rule>
<description>
The decision rules used by the NavigationHandler to
determine which view must be displayed after the
current view, response.jsp is processed.
</description>
<from-view-id>/response.xhtml</from-view-id>
<navigation-case>
<description>
Indicates to the NavigationHandler that the greeting.jsp
view must be displayed if the Action referenced by a
UICommand component on the response.jsp view returns
the outcome "success".
</description>
<from-outcome>success</from-outcome>
<to-view-id>/greeting.xhtml</to-view-id>
</navigation-case>
</navigation-rule>
</faces-config>
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guessNumber.UserNumberBean.java
/*
* Copyright 2009 Sun Microsystems, Inc.
* All rights reserved. You may not modify, use,
* reproduce, or distribute this software except in
* compliance with the terms of the License at:
* http://developer.sun.com/berkeley_license.html
*/
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package guessNumber;
import java.util.Random;
public class UserNumberBean {
Integer randomInt = null;
Integer userNumber = null;
String response = null;
private boolean maximumSet = false;
private boolean minimumSet = false;
private long maximum = 0;
private long minimum = 0;
public UserNumberBean() {
Random randomGR = new Random();
randomInt = new Integer(randomGR.nextInt(10));
System.out.println("Duke's number: " + randomInt);
}
public void setUserNumber(Integer user_number) {
userNumber = user_number;
}
public Integer getUserNumber() {
return userNumber;
}
public String getResponse() {
if ((userNumber != null) && (userNumber.compareTo(randomInt) == 0)) {
return "Yay! You got it!";
} else {
return "Sorry, " + userNumber + " is incorrect.";
}
}
public long getMaximum() {
return (this.maximum);
}
public void setMaximum(long maximum) {
this.maximum = maximum;
this.maximumSet = true;
}
public long getMinimum() {
return (this.minimum);
}
public void setMinimum(long minimum) {
this.minimum = minimum;
this.minimumSet = true;
}
}
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