本文整理了Java中com.google.gwt.user.client.History类的一些代码示例，展示了History类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。History类的具体详情如下：
包路径：com.google.gwt.user.client.History
类名称：History

History介绍

[英]This class allows you to interact with the browser's history stack. Each "item" on the stack is represented by a single string, referred to as a "token". You can create new history items (which have a token associated with them when they are created), and you can programmatically force the current history to move back or forward.

In order to receive notification of user-directed changes to the current history item, implement the ValueChangeHandler interface and attach it via #addValueChangeHandler(ValueChangeHandler).

Example

com.google.gwt.examples.HistoryExample

URL Encoding

Any valid characters may be used in the history token and will survive round-trips through #newItem(String) to #getToken()/ ValueChangeHandler#onValueChange(com.google.gwt.event.logical.shared.ValueChangeEvent), but most will be encoded in the user-visible URL. The following US-ASCII characters are not encoded on any currently supported browser (but may be in the future due to future browser changes):

• a-z
• A-Z
• 0-9
• ;,/?:@&=+$-_.!~*()
  [中]此类允许您与浏览器的历史堆栈交互。堆栈上的每个“项”由单个字符串表示，称为“令牌”。您可以创建新的历史记录项（当它们被创建时，具有与之关联的标记），并且可以通过编程强制当前历史记录向后或向前移动。
  为了接收用户指示的对当前历史记录项的更改通知，请实现ValueChangeHandler接口，并通过#addValueChangeHandler（ValueChangeHandler）附加该接口。
  ####范例
  通用域名格式。谷歌。gwt。例子。历史例子
  ####URL编码
  任何有效字符都可以在历史标记中使用，并且在通过#newItem（String）到#getToken（）/ValueChangeHandler#onValueChange（com.google.gwt.event.logical.shared.ValueChangeEvent）的往返过程中仍然有效，但大多数字符将编码在用户可见的URL中。以下US-ASCII字符未在任何当前支持的浏览器上编码（但将来可能会因浏览器的更改而编码）：
  *a-z
  *A-Z
• 0-9
• ;,/?:@&=+$-_.!~*()

代码示例

代码示例来源：origin: kaaproject/kaa

/**
 * Reset the current history.
 */
public void resetCurrentHistory() {
 historyParams.clear();
 String historyToken = UrlParams.generateParamsUrl(historyParams);
 History.newItem(historyToken, false);
}

代码示例来源：origin: com.google.gwt/gwt-servlet

public com.google.gwt.event.shared.HandlerRegistration addValueChangeHandler(
  ValueChangeHandler<String> valueChangeHandler) {
 return History.addValueChangeHandler(valueChangeHandler);
}

代码示例来源：origin: kaaproject/kaa

private void processHistory(ValueChangeEvent<String> event) {
 String historyToken;
 if (event != null) {
  historyToken = event.getValue();
 } else {
  historyToken = History.getToken();
 }
 updateHistoryParamsFromToken(historyToken);
}

代码示例来源：origin: kaaproject/kaa

@Override
public void onModuleLoad() {
 HistoryHandler historyHandler = new HistoryHandler();
 History.addValueChangeHandler(historyHandler);
 updateHistoryParamsFromToken(History.getToken());
 authService.checkAuth(new AsyncCallback<AuthResultDto>() {
  @Override
  public void onFailure(Throwable caught) {
   authResult = Result.ERROR;
   showLogin();
   Utils.handleException(caught, view);
  }
  @Override
  public void onSuccess(AuthResultDto result) {
   authResult = result.getAuthResult();
   if (authResult == Result.OK) {
    redirectToModule("kaaAdmin");
   } else {
    showLogin();
    if (authResult == Result.ERROR) {
     view.setErrorMessage(Utils.messages.unexpectedError());
    } else if (authResult == Result.KAA_ADMIN_NOT_EXISTS) {
     view.setInfoMessage(Utils.messages.kaaAdminNotExists());
    }
   }
  }
 });
}

代码示例来源：origin: com.google.gwt/gwt-servlet

private static void onHashChanged() {
  /*
   * We guard against firing events twice, some browser (e.g. safari) tend to
   * fire events on startup if HTML5 pushstate is used.
   */
  String hashToken = getDecodedHash();
  if (!hashToken.equals(getToken())) {
   token = hashToken;
   historyEventSource.fireValueChangedEvent(hashToken);
  }
 }
}

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Replace the current history token on top of the browsers history stack.
 *
 * <p>Note: This method has problems. The URL is updated with window.location.replace,
 * this unfortunately has side effects when using the deprecated iframe linker
 * (ie. "std" linker). Make sure you are using the cross site iframe linker when using
 * this method in your code.
 *
 * <p>Calling this method will cause
 * {@link ValueChangeHandler#onValueChange(com.google.gwt.event.logical.shared.ValueChangeEvent)}
 * to be called as well if and only if issueEvent is true.
 *
 * @param historyToken history token to replace current top entry
 * @param issueEvent issueEvent true if a
 *          {@link ValueChangeHandler#onValueChange(com.google.gwt.event.logical.shared.ValueChangeEvent)}
 *          event should be issued
 */
public static void replaceItem(String historyToken, boolean issueEvent) {
 token = historyToken;
 impl.replaceToken(encodeHistoryToken(historyToken));
 if (issueEvent) {
  fireCurrentHistoryState();
 }
}

代码示例来源：origin: org.eagle-i/eagle-i-search-gwt

private void update(final String pageParams) {
  if ( pageMode == null ) {
    // FIXME seriously revisit exception handling in the search UI
    throw new RuntimeException( "Cannot set history" );
  }
  final StringBuilder buf = new StringBuilder( pageMode.getToken() );
  if ( pageParams != null && pageParams.length() > 0 ) {
    // Use the standard ? to signal the start of the query parameters
    buf.append( pageParams );
  }
  
  String newPageParams = buf.toString();
  String currentPageParams = getCurrentPageParams();
  if ( currentPageParams.equals( newPageParams ) ) {
    History.fireCurrentHistoryState();
  } else {
    History.newItem( newPageParams );
  }
}

代码示例来源：origin: org.jvnet.hudson.main/maven3-plugin

private void startHistoryManagement() {
    // Manage history change/navigation.
    // TODO: figure out how this fits in with Activities and Places.
    // TODO: probably pull this into a separate component.
    History.addValueChangeHandler(new ValueChangeHandler<String>()
    {
      public void onValueChange(ValueChangeEvent<String> event) {
        String historyToken = event.getValue();

        // Find the module matching the history token.
        if (historyToken.startsWith("module-")) {
          String moduleId = historyToken.substring("module-".length());

          for (MavenProjectDTO module : mdp.getList()) {
            if (moduleId.equals(module.getId())) {
              moduleInfoPickerPresenter.selectModule(module);
              // Show the module info tab.
              mainPanel.selectModuleInfo();
              break;
            }
          }
        }
      }
    });

    // Navigate to initial history state (as determined by the URL).
    History.fireCurrentHistoryState();
  }
}

代码示例来源：origin: bedatadriven/activityinfo

private void onNavigationCompleted(PageState place) {
  String token = PageStateSerializer.serialize(place);
  /*
   * If it's a duplicate, we're not totally interested
   */
  if (!token.equals(History.getToken())) {
    /*
     * Lodge in the browser's history
     */
    History.newItem(token, false);
  }
}

代码示例来源：origin: ArcBees/GWTP

@Override
public void navigateBack() {
  History.back();
}

代码示例来源：origin: ltearno/hexa.tools

public void refreshCurrentPlace()
{
  History.fireCurrentHistoryState();
}

代码示例来源：origin: bedatadriven/activityinfo

private void fireInitialPage() {
  if (History.getToken().length() != 0) {
    Log.debug("HistoryManager: firing initial placed based on intial token: "
        + History.getToken());
    History.fireCurrentHistoryState();
  } else {
    eventBus.fireEvent(new NavigationEvent(
        NavigationHandler.NAVIGATION_REQUESTED, new DashboardPlace()));
  }
}

代码示例来源：origin: org.eagle-i/eagle-i-search-gwt

public void clearHistory() {
  final String historyPageMode =  getPageModeFromHistory( History.getToken() );
  resultAnalytics = new SearchResultAnalytics();
  if ( historyPageMode.isEmpty() )  {
  final String pageParam = getPageParamFromHistory( History.getToken() );
  if ( PageMode.instance.pageToken.startsWith( historyPageMode ) ){
    pageMode = PageMode.instance;
      Window.alert("Invalid URL, cannot display resource.");
      log.severe("Expecting exactly 2 parts after split, found: " + parts.length + ". Parts: " + parts);
      History.back();
      return;
      Window.alert("Invalid URL, cannot display resource.");
      log.severe("Expecting first part to be " + URI_KEY + ", found: " + parts[0]);
      History.back();
      return;
    Window.alert("Invalid URL, cannot display resource.");
    log.severe("Unexpected page token: "+pageMode);
    History.back();
    return;

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Adds a new browser history entry. Calling this method will cause
 * {@link ValueChangeHandler#onValueChange(com.google.gwt.event.logical.shared.ValueChangeEvent)}
 * to be called as well if and only if issueEvent is true.
 *
 * @param historyToken the token to associate with the new history item
 * @param issueEvent true if a
 *          {@link ValueChangeHandler#onValueChange(com.google.gwt.event.logical.shared.ValueChangeEvent)}
 *          event should be issued
 */
public static void newItem(String historyToken, boolean issueEvent) {
 historyToken = (historyToken == null) ? "" : historyToken;
 if (!historyToken.equals(getToken())) {
  token = historyToken;
  String updateToken = encodeHistoryToken(historyToken);
  impl.newToken(updateToken);
  if (issueEvent) {
   historyEventSource.fireValueChangedEvent(historyToken);
  }
 }
}

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Sets the history token referenced by this hyperlink. This is the history
 * token that will be passed to {@link History#newItem} when this link is
 * clicked.
 *
 * @param targetHistoryToken the new history token, which may not be null (use
 *          {@link Anchor} instead if you don't need history processing)
 */
@SuppressIsSafeUriCastCheck //TODO(bangert): Refactor setPropertyString
public void setTargetHistoryToken(String targetHistoryToken) {
 assert targetHistoryToken != null
  : "targetHistoryToken must not be null, consider using Anchor instead";
 this.targetHistoryToken = targetHistoryToken;
 String hash = History.encodeHistoryToken(targetHistoryToken);
 anchorElem.setPropertyString("href", "#" + hash);
}

代码示例来源：origin: com.googlecode.mgwt/mgwt

@Override
public void go(int number) {
  if (number > 0) {
    History.forward();
  } else {
    History.back();
  }
}

代码示例来源：origin: org.eagle-i/eagle-i-search-gwt

public void updateCurrentRequest(final StemCellSearchRequest request, boolean redraw) {
  // TODO validate  request
  if(redraw) {
    if(currentPageParamString.equals( request.toUrlParams() ) ) {
      History.fireCurrentHistoryState();
    } else {
      History.newItem( currentPageMode.getToken() + request.toUrlParams() );
    }
  } else {
    // Need to still update internal state and add a history item
    // just don't fire an event
    setInternalRequestState( request.toUrlParams() );
    History.newItem( currentPageMode.getToken() + request.toUrlParams(), false );
  }
}

代码示例来源：origin: com.haulmont.cuba/cuba-web-toolkit

protected void initHandler() {
  handlerRegistration = History.addValueChangeHandler(new ValueChangeHandler<String>() {
    @Override
    public void onValueChange(ValueChangeEvent<String> event) {
    History.fireCurrentHistoryState();

代码示例来源：origin: com.vaadin.external.gwt/gwt-user

private static void onHashChanged() {
  /*
   * We guard against firing events twice, some browser (e.g. safari) tend to
   * fire events on startup if HTML5 pushstate is used.
   */
  String hashToken = getDecodedHash();
  if (!hashToken.equals(getToken())) {
   token = hashToken;
   historyEventSource.fireValueChangedEvent(hashToken);
  }
 }
}

代码示例来源：origin: dennisjzh/GwtMobile-UI

@Override
public void goBack(Object returnValue) {
  History.back();
}