我正在关注internationalization chapter。完成将内容翻译为德语的步骤后，当我尝试在浏览器中加载页面时出现此错误：
11:26:27.142 [ERROR] [stockwatcher] Error while executing the JavaScript provider for property 'locale'
com.google.gwt.core.client.JavaScriptException: (TypeError): Property 'locale' of object is not a function
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:248)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:269)
at com.google.gwt.dev.shell.ModuleSpacePropertyOracle.computePropertyValue(ModuleSpacePropertyOracle.java:193)
at com.google.gwt.dev.shell.ModuleSpacePropertyOracle.getSelectionProperty(ModuleSpacePropertyOracle.java:130)
at com.google.gwt.i18n.rebind.LocaleUtils.getInstance(LocaleUtils.java:85)
at com.google.gwt.i18n.rebind.LocaleInfoGenerator.generate(LocaleInfoGenerator.java:101)
at com.google.gwt.core.ext.GeneratorExtWrapper.generate(GeneratorExtWrapper.java:48)
at com.google.gwt.core.ext.GeneratorExtWrapper.generateIncrementally(GeneratorExtWrapper.java:60)
at com.google.gwt.dev.javac.StandardGeneratorContext.runGeneratorIncrementally(StandardGeneratorContext.java:647)
at com.google.gwt.dev.cfg.RuleGenerateWith.realize(RuleGenerateWith.java:41)
at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind(StandardRebindOracle.java:78)
at com.google.gwt.dev.shell.StandardRebindOracle.rebind(StandardRebindOracle.java:268)
at com.google.gwt.dev.shell.ShellModuleSpaceHost.rebind(ShellModuleSpaceHost.java:141)
at com.google.gwt.dev.shell.ModuleSpace.rebind(ModuleSpace.java:585)
at com.google.gwt.dev.shell.ModuleSpace.rebindAndCreate(ModuleSpace.java:455)
at com.google.gwt.dev.shell.GWTBridgeImpl.create(GWTBridgeImpl.java:49)
at com.google.gwt.core.client.GWT.create(GWT.java:97)
at com.google.gwt.i18n.client.LocaleInfo.<clinit>(LocaleInfo.java:37)
at com.google.gwt.user.client.ui.HasHorizontalAlignment.<clinit>(HasHorizontalAlignment.java:123)
at com.google.gwt.user.client.ui.VerticalPanel.<init>(VerticalPanel.java:31)
at com.google.gwt.sample.stockwatcher.client.StockWatcher.<init>(StockWatcher.java:29)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
at com.google.gwt.dev.shell.ModuleSpace.rebindAndCreate(ModuleSpace.java:465)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:375)
at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
at java.lang.Thread.run(Thread.java:722)
11:26:27.640 [ERROR] [stockwatcher] Unable to load module entry point class com.google.gwt.sample.stockwatcher.client.StockWatcher (see associated exception for details)
com.google.gwt.dev.shell.BrowserChannel$RemoteDeathError: Remote connection lost
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:356)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:218)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:289)
at com.google.gwt.dev.shell.ModuleSpace.displayErrorGlassPanel(ModuleSpace.java:616)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:401)
at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
at java.lang.Thread.run(Thread.java:722)
Caused by: com.google.gwt.dev.shell.BrowserChannelException: Invalid message type PROTOCOL_VERSION received waiting for return.
at com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:350)
at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:218)
at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:561)
at com.google.gwt.dev.shell.ModuleSpace.invokeNativeVoid(ModuleSpace.java:289)
at com.google.gwt.dev.shell.ModuleSpace.displayErrorGlassPanel(ModuleSpace.java:616)
at com.google.gwt.dev.shell.ModuleSpace.onLoad(ModuleSpace.java:401)
at com.google.gwt.dev.shell.OophmSessionHandler.loadModule(OophmSessionHandler.java:200)
at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:525)
at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:363)
at java.lang.Thread.run(Thread.java:722)
11:26:27.959 [ERROR] [stockwatcher] Failed to load module 'stockwatcher' from user agent 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.121 Safari/535.2' at localhost:52343
这是StockWatcher.java的代码：
package com.google.gwt.sample.stockwatcher.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.i18n.client.NumberFormat;
import com.google.gwt.user.client.Random;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.TextBox;
import com.google.gwt.user.client.ui.VerticalPanel;
import java.util.ArrayList;
import java.util.Date;
public class StockWatcher implements EntryPoint {
private static final int REFRESH_INTERVAL = 5000;
private VerticalPanel mainPanel = new VerticalPanel(); //line 29
private FlexTable stocksFlexTable = new FlexTable();
private HorizontalPanel addPanel = new HorizontalPanel();
private TextBox newSymbolTextBox = new TextBox();
private Button addStockButton = new Button("Add");
private Label lastUpdatedLabel = new Label();
private ArrayList<String> stocks = new ArrayList<String>();
private StockWatcherConstants constants = GWT.create(StockWatcherConstants.class);
/**
* Entry point method.
*/
public void onModuleLoad() {
// Set the window title, the header text, and the Add button text.
Window.setTitle(constants.stockWatcher());
RootPanel.get("appTitle").add(new Label(constants.stockWatcher()));
addStockButton = new Button(constants.add());
// Create table for stock data.
stocksFlexTable.setText(0, 0, constants.symbol());
stocksFlexTable.setText(0, 1, constants.price());
stocksFlexTable.setText(0, 2, constants.change());
stocksFlexTable.setText(0, 3, constants.remove());
// Add styles to elements in the stock list table.
stocksFlexTable.setCellPadding(6);
stocksFlexTable.getRowFormatter().addStyleName(0, "watchListHeader");
stocksFlexTable.addStyleName("watchList");
stocksFlexTable.getCellFormatter().addStyleName(0, 1, "watchListNumericColumn");
stocksFlexTable.getCellFormatter().addStyleName(0, 2, "watchListNumericColumn");
stocksFlexTable.getCellFormatter().addStyleName(0, 3, "watchListRemoveColumn");
// Assemble Add Stock panel.
addPanel.add(newSymbolTextBox);
addPanel.add(addStockButton);
addPanel.addStyleName("addPanel");
// Assemble Main panel.
mainPanel.add(stocksFlexTable);
mainPanel.add(addPanel);
mainPanel.add(lastUpdatedLabel);
// Associate the Main panel with the HTML host page.
RootPanel.get("stockList").add(mainPanel);
// Move cursor focus to the input box.
newSymbolTextBox.setFocus(true);
// Setup timer to refresh list automatically.
Timer refreshTimer = new Timer() {
@Override
public void run() {
refreshWatchList();
}
};
refreshTimer.scheduleRepeating(REFRESH_INTERVAL);
// Listen for mouse events on the Add button.
addStockButton.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
addStock();
}
});
// Listen for keyboard events in the input box.
newSymbolTextBox.addKeyPressHandler(new KeyPressHandler() {
public void onKeyPress(KeyPressEvent event) {
if (event.getCharCode() == KeyCodes.KEY_ENTER) {
addStock();
}
}
});
}
/**
* Add stock to FlexTable. Executed when the user clicks the addStockButton or
* presses enter in the newSymbolTextBox.
*/
private void addStock() {
final String symbol = newSymbolTextBox.getText().toUpperCase().trim();
newSymbolTextBox.setFocus(true);
// Stock code must be between 1 and 10 chars that are numbers, letters, or dots.
if (!symbol.matches("^[0-9a-zA-Z\\.]{1,10}$")) {
Window.alert("'" + symbol + "' is not a valid symbol.");
newSymbolTextBox.selectAll();
return;
}
newSymbolTextBox.setText("");
// Don't add the stock if it's already in the table.
if (stocks.contains(symbol))
return;
// Add the stock to the table.
int row = stocksFlexTable.getRowCount();
stocks.add(symbol);
stocksFlexTable.setText(row, 0, symbol);
stocksFlexTable.setWidget(row, 2, new Label());
stocksFlexTable.getCellFormatter().addStyleName(row, 1, "watchListNumericColumn");
stocksFlexTable.getCellFormatter().addStyleName(row, 2, "watchListNumericColumn");
stocksFlexTable.getCellFormatter().addStyleName(row, 3, "watchListRemoveColumn");
// Add a button to remove this stock from the table.
Button removeStockButton = new Button("x");
removeStockButton.addStyleDependentName("remove");
removeStockButton.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
int removedIndex = stocks.indexOf(symbol);
stocks.remove(removedIndex);
stocksFlexTable.removeRow(removedIndex + 1);
}
});
stocksFlexTable.setWidget(row, 3, removeStockButton);
// Get the stock price.
refreshWatchList();
}
/**
* Generate random stock prices.
*/
private void refreshWatchList() {
final double MAX_PRICE = 100.0; // $100.00
final double MAX_PRICE_CHANGE = 0.02; // +/- 2%
StockPrice[] prices = new StockPrice[stocks.size()];
for (int i = 0; i < stocks.size(); i++) {
double price = Random.nextDouble() * MAX_PRICE;
double change = price * MAX_PRICE_CHANGE
* (Random.nextDouble() * 2.0 - 1.0);
prices[i] = new StockPrice(stocks.get(i), price, change);
}
updateTable(prices);
}
/**
* Update the Price and Change fields all the rows in the stock table.
*
* @param prices Stock data for all rows.
*/
private void updateTable(StockPrice[] prices) {
for (int i = 0; i < prices.length; i++) {
updateTable(prices[i]);
}
// // Display timestamp showing last refresh.
// lastUpdatedLabel.setText("Last update : "
// + DateTimeFormat.getMediumDateTimeFormat().format(new Date()));
}
/**
* Update a single row in the stock table.
*
* @param price Stock data for a single row.
*/
private void updateTable(StockPrice price) {
// Make sure the stock is still in the stock table.
if (!stocks.contains(price.getSymbol())) {
return;
}
int row = stocks.indexOf(price.getSymbol()) + 1;
// Format the data in the Price and Change fields.
String priceText = NumberFormat.getFormat("#,##0.00").format(
price.getPrice());
NumberFormat changeFormat = NumberFormat.getFormat("+#,##0.00;-#,##0.00");
String changeText = changeFormat.format(price.getChange());
String changePercentText = changeFormat.format(price.getChangePercent());
// Populate the Price and Change fields with new data.
stocksFlexTable.setText(row, 1, priceText);
Label changeWidget = (Label)stocksFlexTable.getWidget(row, 2);
changeWidget.setText(changeText + " (" + changePercentText + "%)");
// Change the color of text in the Change field based on its value.
String changeStyleName = "noChange";
if (price.getChangePercent() < -0.1f) {
changeStyleName = "negativeChange";
}
else if (price.getChangePercent() > 0.1f) {
changeStyleName = "positiveChange";
}
changeWidget.setStyleName(changeStyleName);
}
}
哈维尔
答案 0 :(得分：7)
堆栈跟踪中对第29行的引用可能表示
private StockWatcherConstants constants =
GWT.create(StockWatcherConstants.class);
无法实例化。我在您的帖子中找不到StockWatcherConstants的文字。
作为使用GWT进行本地化的德国人 - 通常使用Messages而非Constants - 我不记得看到完全相同的错误，但有一些常见的陷阱。
请确保您的属性文件确实使用UTF-8编码。正如GWT文档所述，它不符合标准Java。
另外，请确保您的Module.gwt.xml设置正确。您的应用应继承国际化模块。
<inherits name="com.google.gwt.i18n.I18N"/>
此外，您应声明可用的区域设置，并选择默认区域。
<extend-property name="locale" values="de"/>
<!-- <extend-property name="locale" values="en"/> -->
<!-- <extend-property name="locale" values="zh"/> -->
<set-property-fallback name="locale" value="de"/>
要更改区域设置，必须重新加载应用程序。语言环境被编译为单独的JavaScript文件。
如果您不希望依赖HTTP标头进行本地化，则可以从cookie设置区域设置。
String localeCookie = Cookies.getCookie(LocaleInfo.getLocaleCookieName());
if(localeCookie != null) {
setLocale(localeCookie);
}
其他地方则需要以下声明。
protected void setLocale(String targetLocale) {
if (LocaleInfo.getCurrentLocale().getLocaleName().equals(targetLocale))
return;
Set<String> availableLocales =
new HashSet<String>(Arrays.asList(LocaleInfo.getAvailableLocaleNames()));
if (! availableLocales.contains(targetLocale))
return;
Cookies.setCookie(LocaleInfo.getLocaleCookieName(), targetLocale,
new Date(new Date().getTime() + COOKIE_LIFETIME));
Window.Location.reload();
}
请确保您还在Module.gwt.xml。
<set-configuration-property name="locale.cookie" value="GWTlocale"/>
您可以使用此setLocale（）函数更改区域设置以响应UI事件。但是，由于重新加载，您将丢失所有状态信息。
如果您使用Places，则可以使用第二个Cookie返回原来的位置。
eventBus.addHandler(PlaceChangeEvent.TYPE, new PlaceChangeEvent.Handler() {
@Override
public void onPlaceChange(PlaceChangeEvent event) {
Cookies.setCookie(HISTORY_COOKIE,
historyMapper.getToken(event.getNewPlace()),
new Date(new Date().getTime() + COOKIE_LIFETIME));
}
});
启动时，您的应用程序会查看cookie，然后，您会看到新语言环境中的相同位置。
String lastToken = Cookies.getCookie(HISTORY_COOKIE);
Place defaultPlace =
(lastToken != null ? historyMapper.getPlace(lastToken) : Place.NOWHERE);
if (defaultPlace == Place.NOWHERE)
defaultPlace = new BestPlaceToStartYourApplication();
historyHandler.register(placeController, eventBus, defaultPlace);
historyHandler.handleCurrentHistory();
由于您的问题长期未得到答复，因此此回复更为全面。希望它能让你开始在GWT中实现国际化。