public String logout() { 
FacesContext fc = FacesContext.getCurrentInstance(); HttpSession session = (HttpSession) fc.getExternalContext().getSession(false); session.invalidate(); return "login_page"; 
}
<% session.invalidate(); %> <c:redirect url="loginPage.jsf" />
<context-param> <param-name>productId</param-name> <param-value>2004Q4</param-value> </context-param>
<context-param> <param-name>connectionString</param-name> <param-value>jdbc:oracle:thin:scott/tiger@cartman:1521:O901DB</param-value> </context-param>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %> <f:loadBundle basename="demo.bundle.Messages" var="Message"/> <html> <head> <title>Input Name Page</title> <script> function gowait() { document.getElementById("main").style.visibility="hidden"; document.getElementById("wait").style.visibility="visible"; } </script> </head> <body bgcolor="white"> <f:view> <div id="main"> <h1><h:outputText value="#{Message.inputname_header}"/></h1> <h:messages style="color: red"/> <h:form id="helloForm"> <h:outputText value="#{Message.prompt}"/> <h:inputText id="userName" value="#{GetNameBean.userName}" required="true"> <f:validateLength minimum="2" maximum="20"/> </h:inputText> <h:commandButton onclick="gowait()" id="submit" action="#{GetNameBean.action}" value="Say Hello" /> </h:form> </div> <div id="wait" style="visibility:hidden; position: absolute; top: 0; left: 0"> <table width="100%" height ="300px"> <tr> <td align="center" valign="middle"> <h2>Please, wait
</h2> </td> </tr> </table> </div> </f:view> </body> </html> 如果你想有一个动画gif囄?/span>"L(fng)?.."?当表单提交后该图片应该从新加?因此,再一ơ指定图片的id,q且dl过一D|间g时后重新加蝲的代?下面是个例子: <script>
function gowait() { document.getElementById("main").style.visibility="hidden"; document.getElementById("wait").style.visibility="visible"; window.setTimeout('showProgress()', 500); } function showProgress(){ var wg = document.getElementById("waitgif"); wg.src=wg.src; } </script> . <img id="waitgif" src="animated.gif"> Vincent-chen 2008-12-01 09:55 发表评论
]]>
public String logout() { FacesContext fc = FacesContext.getCurrentInstance(); HttpSession session = (HttpSession) fc.getExternalContext().getSession(false); session.invalidate(); return "login_page";}
下面的代码片D늤例了如何在JSP面中结束session:
<% session.invalidate(); %><c:redirect url="loginPage.jsf" />
Vincent-chen 2008-11-29 13:06 发表评论
]]>Vincent-chen 2008-11-27 11:36 发表评论
]]>JSP代码Q?/strong>
<h:commandLink actionListener="#{productBean.downloadAction}" styleClass="highLightLink">
<h:outputText value="download"/>
<f:param name="productId" value="#{productBean.id}"/>
</h:commandLink>
Backing bean设计?qing)代码?x)
注意q是个Action listenerҎ(gu)Q没有返回|q且有javax.faces.event.ActionEvent参数
public void downloadAction(ActionEvent event) {
try {
String fileName="D:\\temp\\images\\products\\" + this.id + ".xls";
logger.debug("file name=" + fileName);
ByteArrayOutputStream baos=this.serviceLocator.getFileService().downloadFile(fileName); //调用ServiceҎ(gu)Q获得文件的ByteArrayOutputStream
HttpServletResponse response=FacesUtils.getServletResponse();
response.setHeader("Content-disposition", "attachment; filename=" + id+ ".xls" ); //不是内嵌昄(inline)Q而是作ؓ(f)附g下蝲
response.setContentLength(baos.size());
ServletOutputStream sos=response.getOutputStream();
baos.writeTo(sos);
baos.close();
sos.flush();
} catch (IOException ex) {
logger.debug(ex);
}
}
Service代码Q?/strong>
q个实现是一个从已经存在的物理文件获得输出流的范例，至于由Server在内存中生成输出也是一样处理，例如生成一个Excel文gQ再让用户下载?br />
public ByteArrayOutputStream downloadFile(String fileName) throws IOException {
FileInputStream fis=new FileInputStream(fileName);
BufferedInputStream bis=new BufferedInputStream(fis);
ByteArrayOutputStream baos=new ByteArrayOutputStream();
BufferedOutputStream bos=new BufferedOutputStream(baos);
int i;
while((i=bis.read())!=-1) {
bos.write(i);
}
bos.flush();//提交文g，很关?br /> bis.close();
return baos;
}
Vincent-chen 2008-11-27 11:25 发表评论
]]>
import java.io.FileOutputStream;import java.io.IOException;import java.util.regex.Matcher;import java.util.regex.Pattern;import javax.faces.context.FacesContext;import org.apache.myfaces.custom.fileupload.UploadedFile;public class Fileupload{ private UploadedFile _upFile; private String _name = ""; public UploadedFile getUpFile()
{
return _upFile;
} public void setUpFile(UploadedFile upFile) { _upFile = upFile; } public String getName() { return _name; } public void setName(String name) { _name = name; } public String upload() throws IOException { FacesContext facesContext = FacesContext.getCurrentInstance(); int start=_upFile.getName().lastIndexOf("\\")==-1?_upFile.getName().lastIndexOf("\\"):_upFile.getName().lastIndexOf("\\")+1; String file=_upFile.getName().substring(start,_upFile.getName().length()); String path=Fileupload.class.getResource("/").getPath().substring(1,Fileupload.class.getResource("/").getPath().length()); path=path.replace("%20", " ")+file; try { FileOutputStream keyFOS = new FileOutputStream(path); keyFOS.write(_upFile.getBytes()); keyFOS.close(); } catch (Exception e) { System.out.println("lalala"); } facesContext.getExternalContext().getApplicationMap().put("fileupload_bytes", _upFile.getBytes()); facesContext.getExternalContext().getApplicationMap().put("fileupload_type", _upFile.getContentType()); facesContext.getExternalContext().getApplicationMap().put("fileupload_name", _upFile.getName()); return path; }public boolean isUploaded() { FacesContext facesContext = FacesContext.getCurrentInstance(); return facesContext.getExternalContext().getApplicationMap().get("fileupload_bytes")!=null; }}
前台实现QMyfaces
<t:inputFileUpload id="fileupload" value="#{action$fixing.myFile}" storage="file" styleClass="fileUploadInput" maxlength="200000"/> <h:commandButton value="#{prompt['Submit']}" action="#{action$fixing.sel}" />
后台理BeanQ?/span>
import org.apache.myfaces.custom.fileupload.UploadedFile; public class FixingAction{private UploadedFile myFile; public UploadedFile getMyFile() { return myFile; } public void setMyFile(UploadedFile myFile) { this.myFile = myFile; } public String sel(){ Fileupload file=new Fileupload();String path=file.setUpFile(this.myFile);System.out.println("文g存放路径Q?+path);return null; }}Vincent-chen 2008-11-27 11:17 发表评论
]]>public String btnSaveXML_action() { // TODO: Process the action. Return value is a navigation // case name where null will return to the same page. try { //get the appId Integer appId = Integer.valueOf(txtMemory1.getText().toString()); String appName = datamanagementservice.getAppNameByAppId(appId); Document doc = writeXML(appId, appName); TransformerFactory tFactory = TransformerFactory.newInstance(); Transformer transformer = tFactory.newTransformer(); DOMSource source = new DOMSource(doc); //the file's loadpath String loadPath = "c:\\temp\\" + appName + ".xml"; //if the file no exist then create it File f = new File("c:\\temp\\"); f.mkdirs(); StreamResult result = new StreamResult(new java.io.File(loadPath)); transformer.transform(source, result); //new a download file File t_file = new File(loadPath); long l; for (l = 0L; l == 0L; l = t_file.length()) { t_file = new File(loadPath); } InputStream in = new FileInputStream(t_file); if (in != null) { String filename = t_file.getName(); filename = java.net.URLEncoder.encode(filename, "utf-8"); FacesContext.getCurrentInstance().responseComplete(); HttpServletResponse httpServletResponse = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse(); httpServletResponse.reset(); httpServletResponse.setContentType("application/x-msdownload"); String rrr = "attachment; filename=" + filename; httpServletResponse.setHeader("Content-Disposition", rrr); httpServletResponse.setContentLength((int) l); byte b[] = new byte[2048]; for (int len = 0; (len = in.read(b)) > 0;) { httpServletResponse.getOutputStream().write(b, 0, len); } in.close(); } } catch (Exception e) { e.printStackTrace(); } getRequestBean1().setSelectAppId((Integer) dropDown1.getSelected()); return null; }Vincent-chen 2008-11-27 10:39 发表评论
]]>惛_JSF控g中操作框枉FramesetQ可以在左框枉QQ一框架）里声明一个FormQ设定好它的target="mainFrame"QQ一框架늚idQ，q样当点击这个Form里面的CommandButton或者CommandLink的时候，JSF处理好业务逻辑后，可以将To-View-ID指定的页面{C框架里面去昄了?br />
|
<h:form target="mainFrame"> |
mainFrame |
点击左边的commandButton之后Qindex处理之后的To-View-ID指定的页面就?x)显C在mainFrame里面?
W二U方法：(x)
<script>
function forward(p) {
window.parent.mainFrame.location.href="usermanagement/" + p + ".faces";
}
</script>当不需要Action的时?
<rich:panelMenuItem label="角色信息l护" onclick="forward('rolelist')" />当需要先q行Action操作再蟩转的时?br />
<rich:panelMenuItem label="新徏角色" action="#{user.addRoleMain}" oncomplete="forward('roledetail')" /> public String addRoleMain() { ClearRole(); return null; }q样Q在Action完成后，菜单不?x)变Q主框架会(x)跌{到指定页面?br />
OK,上面两种Ҏ(gu)基本能满_发需要了?
Vincent-chen 2008-11-23 01:05 发表评论
]]>Vincent-chen 2008-11-23 01:04 发表评论
]]>惛_JSF控g中操作框枉FramesetQ可以在左框枉QQ一框架）里声明一个FormQ设定好它的target="mainFrame"QQ一框架늚idQ，q样当点击这个Form里面的CommandButton或者CommandLink的时候，JSF处理好业务逻辑后，可以将To-View-ID指定的页面{C框架里面去昄了?br />
|
<h:form target="mainFrame"> |
mainFrame |
点击左边的commandButton之后Qindex处理之后的To-View-ID指定的页面就?x)显C在mainFrame里面?
Vincent-chen 2008-11-23 00:42 发表评论
]]>
Vincent-chen 2008-11-23 00:39 发表评论
]]>JSF面中的代码Q?br />
<h:form id="messageForm"><h:outputText id="outputMessage"/><h:commandButton value="Get Message"actionListener="#{testForm.sendMessage}"/></h:form>public void sendMessage(ActionEvent e){FacesContext context = FacesContext.getCurrentInstance();UIViewRoot view = context.getViewRoot();HtmlOutputText output =(HtmlOutputText)view.findComponent("messageForm:outputMessage");output.setStyle("color:blue");output.setValue("Who's the Mann?");}W二U方法：(x)
<h:inputText value="#{registrationForm.comments}"binding="#{registrationForm.commentsInput}"/>Vincent-chen 2008-11-23 00:38 发表评论
]]><h:inputText valueChangeListener="#{myForm.processValueChanged}"/><h:panelGrid binding="#{myForm.changePanel}" rendered="false">
</h:panelGrid>
public void processValueChanged(ValueChangeEvent event){HtmlInputText sender = (HtmlInputText)event.getComponent();sender.setReadonly(true);changePanel.setRendered(true);}当inputText的值改变的时候会(x)触发processValueChanged事gQ此事情内部通过参数Q获取HtmlInputText的控Ӟ然后讑֮readonlyQ同时设定panelGrid的模型changePanel的属性，因ؓ(f)panelGridl定了changePanelq个模型?br />
2、Action events(动作事g)
<h:commandButton type="submit" value="Login" action="success"immediate="true"/>上面q个是静态outcome事gQ在faces-config.xml中配|相应的属性后Q点击该按钮?x){向相应的Ҏ(gu)?br />
<h:commandButton value = "Test Action Listener" actionListener = "#{testActionListener.doSomeAction}" />如果d了actionListener属性的话，点击之后Q在转向其他面之前Q会(x)触发指定的事Ӟ处理之后再{向?br />
q里的doSomeActionҎ(gu)的声明是void doSomeAction(ActionEvent actionEvent)?br />
<h:commandButton type="submit" value="Login"action="#{loginForm.login}"/>上面q个是动态outcome事gQ当点击该按钮之后会(x)直接触发loginForm中的login事gQlogin事gq回的是一个字W串Q在login处理完相应操作之后需要返回一个属性中已经配置q的字符Ԍ例如successQ然后JSFҎ(gu)faces-config.xml中的配置Q蟩转到相应的页面。login的声明一般是String login();
当然也可以通过E序来添加监听器Q不q监听器c需要实现ActionListener接口Q?br />
UIComponent myComponent = new UIComponent();myComponent.addActionListener(new TestActionListener());myComponent.addActionListener(new CustomActionListener());
3、Data model eventsQ数据模型事Ӟ
FacesContext facesContext = FacesContext.getCurrentInstance();dataTable = (HtmlDataTable)facesContext.getApplication().createComponent(HtmlDataTable.COMPONENT_TYPE);DataModel myDataModel = new ResultSetDataModel(myResultSet);myDataModel.addDataModelListener(new DataModelListener(){public void rowSelected(DataModelEvent e){FacesContext.getCurrentInstance().getExternalContext().log("row selected:" + e.getRowIndex());}});dataTable.setValue(myDataModel);上面的代码攑օ初始化程序中Q当行的选择改变的时候就?x)触发相应的日志打印?br />
q是因ؓ(f)q段代码ldataTable控g定义了一个数据模型，数据和相应的事g全部存在q个数据模型里面Q然后将dataTable与这个模型进行绑定即可用它所有的数据和事件。点击dataTable上面的一行自然也׃(x)出发相应的行选择事g?
4.Phase eventsQ阶D事Ӟ
q个事g是ؓ(f)了捕捉一些阶D和q程而设定的Q有以下几个阶段可以捕捉Q?br />
ANY_PHASE M阶段APPLY_REQUEST_VALUES h处理阶段的应用请求值阶D?br />
INVOKE_APPLICATION h处理阶段的调用程序阶D?br />
PROCESS_VALIDATIONS h处理阶段的处理验证阶D?br />
RENDER_RESPONSE h处理阶段的描q响应阶D?br />
RESTORE_VIEW h处理阶段的恢复视ND?br />
UPDATE_MODEL_VALUES h处理阶段的更新模型值阶D?/span>
具体可以参?/span>http://java.sun.com/javaee/javaserverfaces/1.1_01/docs/api/javax/faces/event/PhaseId.html
通过讑֮在实现类中设定相应的PhaseId以及(qing)d到faces-config.xml中就可以捕捉相应阶段事gq添加响应的代码
实现c?/span>
import javax.faces.event.PhaseEvent;import javax.faces.event.PhaseId;import javax.faces.event.PhaseListener;public class CustomPhaseListener implements PhaseListener{ public CustomPhaseListener() { } public void afterPhase(PhaseEvent event) { System.out.println("After Phase->" + event.getPhaseId()); } public void beforePhase(PhaseEvent event) { System.out.println("Before Phase->" + event.getPhaseId()); } public PhaseId getPhaseId() { return PhaseId.ANY_PHASE;//选择事g标识的常量，此ؓ(f)M阶段 } }
在faces-config.xml中添?br />
<lifecycle> <phase-listener> net.javabeat.articles.jsf.events.actions.TestActionListener </phase-listener></lifecycle>
当然可以d无限个的监听?br />
<lifecycle> <phase-listener>PhaseListener1</phase-listener> <phase-listener>PhaseListener2</phase-listener></lifecycle>
下面是请求处理的生命周期Q大家可以直观的看一下各个阶D|行顺序：(x)
各个阶段的说明以?qing)所能触发的事g
Vincent-chen 2008-11-23 00:37 发表评论
]]>org.test.TestBean x = (org.test.TestBean) request.getSession().getAttribute("testBean");如果不存在，则需要先讉K一下Managed-BeanQ让他被触发而创?br />
org.test.TestBean x = (org.test.TestBean) Util.getBean("testBean"); //In Util.java:public static Object getBean(String expr){FacesContext context = FacesContext.getCurrentInstance(); Application app = context.getApplication(); ValueBinding binding = app.createValueBinding("#{" + expr + "}");Object value = binding.getValue(context); return value;}为JSF指定ActionQ可以这样写Q?br />
<h:commandButton action="#{user.verify}" value="Say Hello!"> </h:commandButton> public String verify() { return "hello"; } <managed-bean> <description>User Name Bean</description> <managed-bean-name>user</managed-bean-name> <managed-bean-class>demo.User</managed-bean-class> <managed-bean-scope>session</managed-bean-scope> </managed-bean> <navigation-rule> <from-view-id>/pages/inputUserName.jsp</from-view-id> <navigation-case> <from-outcome>hello</from-outcome> <to-view-id>/pages/hello.jsp</to-view-id> </navigation-case> </navigation-rule>Vincent-chen 2008-11-23 00:21 发表评论
]]>