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我試圖使用ICEfaces創建一個簡單的Web應用程序並遇到問題。ViewState在每次請求後都會隨着ICEfaces增長
這裏是網頁:
<!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:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>test</title>
</h:head>
<h:body>
<h:form>
<h:commandButton value="Action" action="#{test1.action}" />
</h:form>
</h:body>
</html>
下面是支持bean:
@ManagedBean(name = "test1")
@SessionScoped
public class Test1 {
public Test1() {
}
public void action() {
System.out.println("action invoked");
}
}
這裏是web.xml中:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
<display-name>regconf</display-name>
<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>*.xhtml</url-pattern>
</servlet-mapping>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Production</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FACELETS_REFRESH_PERIOD</param-name>
<param-value>1</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
</web-app>
問題是ViewState的大小很大(用Firebug檢查),每次點擊「Action」按鈕時它會增大。在第一次請求之後,它是32 KB,在第二個61 KB之後,然後是94 KB,128 KB等等(在我看來,它總是保存先前請求的狀態)。
當我將javax.faces.STATE_SAVING_METHOD
參數的值設置爲server
時,行爲會發生變化 - 在這種情況下,所有工作都正常,每次請求後ViewState都會保持較小(使用StateManager在服務器端進行檢查)。
我使用Mojarra 2.1.12(也試過MyFaces - 相同的結果),ICEfaces 3.1.0和Tomcat 7.0.29。
在此先感謝。