page1.java

能够实现基本的文件上传

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package fileuploadexample;

import com.sun.rave.web.ui.appbase.AbstractPageBean;
import com.sun.webui.jsf.component.Button;
import com.sun.webui.jsf.component.ImageComponent;
import com.sun.webui.jsf.component.Label;
import com.sun.webui.jsf.component.MessageGroup;
import com.sun.webui.jsf.component.StaticText;
import com.sun.webui.jsf.component.Upload;
import com.sun.webui.jsf.model.UploadedFile;
import java.io.File;
import javax.faces.FacesException;

/**
 * <p>Page bean that corresponds to a similarly named JSP page.  This
 * class contains component definitions (and initialization code) for
 * all components that you have defined on this page, as well as
 * lifecycle methods and event handlers where you may add behavior
 * to respond to incoming events.</p>
 *
 * @version Page1.java
 * @version Created on 2009-5-4, 15:31:10
 * @author Administrator
 */

public class Page1 extends AbstractPageBean {
    private String realImageFilePath;
               private static final String IMAGE_URL = "/resources/image-file";

    // <editor-fold defaultstate="collapsed" desc="Managed Component Definition">

    /**
     * <p>Automatically managed component initialization.  <strong>WARNING:</strong>
     * This method is automatically generated, so any user-specified code inserted
     * here is subject to being replaced.</p>
     */
    private void _init() throws Exception {
    }
    private Label label1 = new Label();

    public Label getLabel1() {
        return label1;
    }

    public void setLabel1(Label l) {
        this.label1 = l;
    }
    private Label label2 = new Label();

    public Label getLabel2() {
        return label2;
    }

    public void setLabel2(Label l) {
        this.label2 = l;
    }
    private Label label3 = new Label();

    public Label getLabel3() {
        return label3;
    }

    public void setLabel3(Label l) {
        this.label3 = l;
    }
    private Upload fileUpload1 = new Upload();

    public Upload getFileUpload1() {
        return fileUpload1;
    }

    public void setFileUpload1(Upload u) {
        this.fileUpload1 = u;
    }
    private StaticText staticText2 = new StaticText();

    public StaticText getStaticText2() {
        return staticText2;
    }

    public void setStaticText2(StaticText st) {
        this.staticText2 = st;
    }
    private StaticText fileNameStaticText = new StaticText();

    public StaticText getFileNameStaticText() {
        return fileNameStaticText;
    }

    public void setFileNameStaticText(StaticText st) {
        this.fileNameStaticText = st;
    }
    private StaticText fileTypeStaticText = new StaticText();

    public StaticText getFileTypeStaticText() {
        return fileTypeStaticText;
    }

    public void setFileTypeStaticText(StaticText st) {
        this.fileTypeStaticText = st;
    }
    private StaticText fileSizeStaticText = new StaticText();

    public StaticText getFileSizeStaticText() {
        return fileSizeStaticText;
    }

    public void setFileSizeStaticText(StaticText st) {
        this.fileSizeStaticText = st;
    }
    private ImageComponent image1 = new ImageComponent();

    public ImageComponent getImage1() {
        return image1;
    }

    public void setImage1(ImageComponent ic) {
        this.image1 = ic;
    }
    private MessageGroup messageGroup1 = new MessageGroup();

    public MessageGroup getMessageGroup1() {
        return messageGroup1;
    }

    public void setMessageGroup1(MessageGroup mg) {
        this.messageGroup1 = mg;
    }
    private Button uploadFileButton = new Button();

    public Button getUploadFileButton() {
        return uploadFileButton;
    }

    public void setUploadFileButton(Button b) {
        this.uploadFileButton = b;
    }

    // </editor-fold>

    /**
     * <p>Construct a new Page bean instance.</p>
     */
    public Page1() {
    }

    /**
     * <p>Callback method that is called whenever a page is navigated to,
     * either directly via a URL, or indirectly via page navigation.
     * Customize this method to acquire resources that will be needed
     * for event handlers and lifecycle methods, whether or not this
     * page is performing post back processing.</p>
     * 
     * <p>Note that, if the current request is a postback, the property
     * values of the components do <strong>not</strong> represent any
     * values submitted with this request.  Instead, they represent the
     * property values that were saved for this view when it was rendered.</p>
     */
    @Override
    public void init() {
// Perform initializations inherited from our superclass
        super.init();
// 执行必须在初始化受管组件
        //*之前*完成的应用程序初始化
        // TODO - 在此处添加您自己的初始化代码
// <editor-fold defaultstate="collapsed" desc="由 Visual Web 管理的组件初始化">
// 自动初始化受管的组件
        // *注意* - 不应修改此逻辑
        try {
            _init();
        } catch (Exception e) {
            log("Page1 Initialization Failure", e);
            throw e instanceof FacesException ? (FacesException) e : new FacesException(e);
        }


    }

    /**
     * <p>Callback method that is called after the component tree has been
     * restored, but before any event processing takes place.  This method
     * will <strong>only</strong> be called on a postback request that
     * is processing a form submit.  Customize this method to allocate
     * resources that will be required in your event handlers.</p>
     */
    @Override
    public void preprocess() {
    }

    /**
     * <p>Callback method that is called just before rendering takes place.
     * This method will <strong>only</strong> be called for the page that
     * will actually be rendered (and not, for example, on a page that
     * handled a postback and then navigated to a different page).  Customize
     * this method to allocate resources that will be required for rendering
     * this page.</p>
     */
    @Override
    public void prerender() {
        String uploadedFileName = (String)
       this.fileNameStaticText.getValue();
       if ( uploadedFileName != null ) {
           image1.setUrl(IMAGE_URL);
            }
    }

    /**
     * <p>Callback method that is called after rendering is completed for
     * this request, if <code>init()</code> was called (regardless of whether
     * or not this was the page that was actually rendered).  Customize this
     * method to release resources acquired in the <code>init()</code>,
     * <code>preprocess()</code>, or <code>prerender()</code> methods (or
     * acquired during execution of an event handler).</p>
     */
    @Override
    public void destroy() {
    }
    
    /**
     * <p>Return a reference to the scoped data bean.</p>
     *
     * @return reference to the scoped data bean
     */
    protected SessionBean1 getSessionBean1() {
        return (SessionBean1) getBean("SessionBean1");
    }

    /**
     * <p>Return a reference to the scoped data bean.</p>
     *
     * @return reference to the scoped data bean
     */
    protected RequestBean1 getRequestBean1() {
        return (RequestBean1) getBean("RequestBean1");
    }

    /**
     * <p>Return a reference to the scoped data bean.</p>
     *
     * @return reference to the scoped data bean
     */
    protected ApplicationBean1 getApplicationBean1() {
        return (ApplicationBean1) getBean("ApplicationBean1");
    }

    public String uploadFileButton_action() {
        //待办事项：执行此操作。返回值为某个导航
        //情况名称；如果返回值为空，将返回至同一页面。
        UploadedFile uploadedFile = fileUpload1.getUploadedFile();
                         if( uploadedFile == null )            return null;
        String uploadedFileName = uploadedFile.getOriginalName();
        // Some browsers return complete path name, some don't
        // Make sure we only have the file name
        // First, try forward slash
        int index = uploadedFileName.lastIndexOf('/');
        String justFileName;
        if ( index >= 0) {
            justFileName = uploadedFileName.substring( index + 1 );
        } else {
            // Try backslash
            index = uploadedFileName.lastIndexOf('\\');
            if (index >= 0) {
                justFileName = uploadedFileName.substring( index + 1 );
            } else {
                // No forward or back slashes
                justFileName = uploadedFileName;
            }
        }
        this.fileNameStaticText.setValue(justFileName);
        Long uploadedFileSize = new Long(uploadedFile.getSize());
        this.fileSizeStaticText.setValue(uploadedFileSize);
        String uploadedFileType = uploadedFile.getContentType();
        this.fileTypeStaticText.setValue(uploadedFileType);
        if ( uploadedFileType.equals("image/jpeg")
        || uploadedFileType.equals("image/pjpeg")
        || uploadedFileType.equals("image/gif")
        || uploadedFileType.equals("image/png")
        || uploadedFileType.equals("image/x-png")) {
            try {
                File file = new File(this.realImageFilePath);
                uploadedFile.write(file);
            } catch (Exception ex) {
                error("Cannot upload file: " + justFileName);
            }
        } else {
            error("You must upload a JPEG, PJPEG, GIF, PNG, or X-PNG file.");
            new File(this.realImageFilePath).delete();
        }
        return null;
    }

}