打开一个完整的网页

Question

有没有使用Java打开完整网页的方法，我必须检查在Java用户端应用程序中打开完整网页所花费的时间，我已经尝试过这段代码：

    URL ur = new URL("http://www.google.com/");
    HttpURLConnection yc =(HttpURLConnection) ur.openConnection();
    BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));
    String inputLine;
    while ((inputLine = in.readLine()) != null) 
    System.out.println(inputLine);
    in.close();

但这给了我网址的源代码……这对我没用！

因为我需要通过制作 Java 应用程序来记录网页加载到我的桌​​面所花费的时间。

一切都在客户网站上！

Answer 1

1. 您可以使用Cobra
2. 您也可以使用plain Swing

3. 你也可以使用 JavaFX 来做这样的事情：

   import javafx.application.Application;
   import javafx.scene.Scene;
   import javafx.stage.Stage;
   import javafx.scene.web.WebView;
   
   public class MyWebView extends Application {
   
       public static void main(String[] args) {
           launch(args);
       }
   
       @Override
       public void start(final Stage primaryStage) {
           final WebView wv = new WebView();
           wv.getEngine().load("http://www.google.com");
           primaryStage.setScene(new Scene(wv));
           primaryStage.show();
       }
   }
   

Answer 2

这是一个基于JavaFX 的示例：

import java.util.Date;
import javafx.application.Application;
import javafx.beans.value.*;
import javafx.concurrent.Worker.State;
import javafx.event.*;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.image.Image;
import javafx.scene.layout.*;
import javafx.scene.web.WebEngine;
import javafx.stage.Stage;

/** times the loading of a page in a WebEngine */
public class PageLoadTiming extends Application {
  public static void main(String[] args) { launch(args); }
  @Override public void start(Stage stage) {
    final Label instructions = new Label(
      "Loads a web page into a JavaFX WebEngine.  " +
      "The first page loaded will take a bit longer than subsequent page loads due to WebEngine intialization.\n" +
      "Once a given url has been loaded, subsequent loads of the same url will be quick as url resources have been cached on the client."
    );
    instructions.setWrapText(true);
    instructions.setStyle("-fx-font-size: 14px");

    // configure some controls.
    final WebEngine engine   = new WebEngine();
    final TextField location = new TextField("http://docs.oracle.com/javafx/2/get_started/jfxpub-get_started.htm");
    final Button    go       = new Button("Go");
    final Date      start    = new Date();
    go.setOnAction(new EventHandler<ActionEvent>() {
      @Override public void handle(ActionEvent arg0) {
        engine.load(location.getText());
        start.setTime(new Date().getTime());
      }
    });
    go.setDefaultButton(true);
    final Label timeTaken = new Label();

    // configure help tooltips.
    go.setTooltip(new Tooltip("Start timing the load of a page at the entered location."));
    location.setTooltip(new Tooltip("Enter the location whose page loading is to be timed."));
    timeTaken.setTooltip(new Tooltip("Current loading state and time taken to load the last page."));

    // monitor the page load status and update the time taken appropriately.
    engine.getLoadWorker().stateProperty().addListener(new ChangeListener<State>() {
      @Override public void changed(ObservableValue<? extends State> state, State oldState, State newState) {
        switch (newState) {
          case SUCCEEDED: timeTaken.setText(((new Date().getTime()) - start.getTime()) + "ms"); break;
          default: timeTaken.setText(newState.toString());  
        }
      }
    });

    // layout the controls.
    HBox controls = HBoxBuilder.create().spacing(10).children(new Label("Location"), location, go, timeTaken).build();
    HBox.setHgrow(location, Priority.ALWAYS);
    timeTaken.setMinWidth(120);

    // layout the scene.
    VBox layout = new VBox(10);
    layout.setStyle("-fx-padding: 10; -fx-background-color: cornsilk; -fx-font-size: 20px;");
    layout.getChildren().addAll(controls, instructions);
    stage.setTitle("Page load timing");
    stage.getIcons().add(new Image("http://icons.iconarchive.com/icons/aha-soft/perfect-time/48/Hourglass-icon.png"));
    stage.setScene(new Scene(layout, 1000, 110));
    stage.show();

    // trigger loading the default page.
    go.fire();
  }
}

Answer 3

是的，家是正确的，应该可以解决问题。但是这种方式要简单得多......虽然有点错误，但它应该可以很好地用于基准测试。

JEditorPane editorPane = new JEditorPane();
editorPane.setPage(new URL("http://www.google.com"));

如果你只使用这个 sn-p，脚本仍然会在屏幕上呈现，尽管它可以解决我认为你不需要为此烦恼，因为你只需要对加载时间进行基准测试......但是结果可能会略有不同，因为运行 JavaScript 并不需要时间。

Answer 4

要使用 java 打开网页，请尝试以下代码：

 import java.io.*;
  public class b {
 public static void main(String args[])throws IOException
 {
 String downloadURL="<url>";
    java.awt.Desktop myNewBrowserDesktop = java.awt.Desktop.getDesktop();
 try
  {
       java.net.URI myNewLocation = new java.net.URI(downloadURL);
      myNewBrowserDesktop.browse(myNewLocation);
  }
 catch(Exception e)
  {
   }
  }
  }

这将在您的默认浏览器中打开网页。至于加载零件所用的时间，请看here。那里有很多建议。