https://mozilla.github.io/rhino/ 下载 rhino1_7R5.zip ， 解压后运行 cmd
cd D:\rhino\rhino1_7R5
先测试最简单的: java -jar js.jar swing1.js
var SwingGui = new JavaImporter(javax.swing, javax.swing.event, javax.swing.border, java.awt.event);
with (SwingGui) {
var frame = new JFrame("test");
frame.setSize(300,200);
var pane = frame.getContentPane();
var button1 = new JButton("button1");
pane.add(button1);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}测试发行版中例子: java -jar js.jar examples/SwingApplication.js 居然报错了
js: Cannot convert function to interface java.awt.event.WindowListener since it
contains methods with different names
看了书【Java 程序设计】，明白了，改一处即可。
with (swingNames) {
try {
UIManager.
setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());
} catch (e) { }
//Create the top-level container and add contents to it.
var frame = new swingNames.JFrame("SwingApplication");
frame.getContentPane().add(createComponents(), BorderLayout.CENTER);
// Pass JS function as implementation of WindowListener. It is allowed since
// all methods in WindowListener have the same signature. To distinguish
// between methods Rhino passes to JS function the name of corresponding
// method as the last argument
/*
frame.addWindowListener(function(event, methodName) {
if (methodName == "windowClosing") {
java.lang.System.exit(0);
}
});
*/
//Finish setting up the frame, and show it.
frame.pack();
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}一个较复杂的例子: 来自参考书【JavaScript 权威指南】第12章
java -jar js.jar rhinoURLFetcher.js
/*
* A download manager application with a simple Java GUI
*/
var swingNames = new JavaImporter(javax.swing, javax.swing.event, javax.swing.border, java.awt,java.awt.event);
importClass(java.net.URL);
importClass(java.io.FileOutputStream);
importClass(java.lang.Thread);
with (swingNames) {
var frame = new JFrame("Rhino URL Fetcher"); // The application window
var urlfield = new JTextField(30); // URL entry field
var button = new JButton("Download"); // Button to start download
var filechooser = new JFileChooser(); // A file selection dialog
var row = Box.createHorizontalBox(); // A box for field and button
var col = Box.createVerticalBox(); // For the row & progress bars
var padding = new EmptyBorder(3,3,3,3); // Padding for rows
// Put them all together and display the GUI
row.add(urlfield); // Input field goes in the row
row.add(button); // Button goes in the row
col.add(row); // Row goes in the column
frame.add(col); // Column goes in the frame
row.setBorder(padding); // Add some padding to the row
frame.pack(); // Set to minimum size
frame.visible = true; // Make the window visible
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// When the user clicks the button, call this function
button.addActionListener(function() {
try {
// Create a java.net.URL to represent the source URL.
// (This will check that the user's input is well-formed)
var url = new URL(urlfield.text);
// Ask the user to select a file to save the URL contents to.
var response = filechooser.showSaveDialog(frame);
// Quit now if they clicked Cancel
if (response != JFileChooser.APPROVE_OPTION) return;
// Otherwise, get the java.io.File that represents the destination file
var file = filechooser.getSelectedFile();
// Now start a new thread to download the url
new java.lang.Thread(function() { download(url,file); }).start();
} catch(e) {
// Display a dialog box if anything goes wrong
JOptionPane.showMessageDialog(frame, e.message, "Exception",
JOptionPane.ERROR_MESSAGE);
}
});
// Use java.net.URL, etc. to download the content of the URL and use
// java.io.File, etc. to save that content to a file. Display download
// progress in a JProgressBar component. This will be invoked in a new thread.
function download(url, file) {
try {
// Each time we download a URL we add a new row to the window
// to display the url, the filename, and the download progress
var row = Box.createHorizontalBox(); // Create the row
row.setBorder(padding); // Give it some padding
var label = url.toString() + ": "; // Display the URL
row.add(new JLabel(label)); // in a JLabel
var bar = new JProgressBar(0, 100); // Add a progress bar
bar.stringPainted = true; // Display filename in
bar.string = file.toString(); // the progress bar
row.add(bar); // Add bar to this new row
col.add(row); // Add row to the column
frame.pack(); // Resize window
// We don't yet know the URL size, so bar starts just animating
bar.indeterminate = true;
// Now connect to the server and get the URL length if we can
var conn = url.openConnection(); // Get java.net.URLConnection
conn.connect(); // Connect and wait for headers
var len = conn.contentLength; // See if we have URL length
if (len) { // If length known, then
bar.maximum = len; // set the bar to display
bar.indeterminate = false; // the percent downloaded
}
// Get input and output streams
var input = conn.inputStream; // To read bytes from server
var output = new FileOutputStream(file); // To write bytes to file
// Create an array of 4k bytes as an input buffer
var buffer = java.lang.reflect.Array.newInstance(java.lang.Byte.TYPE,
4096);
var num;
while((num=input.read(buffer)) != -1) { // Read and loop until EOF
output.write(buffer, 0, num); // Write bytes to file
bar.value += num; // Update progress bar
}
output.close(); // Close streams when done
input.close();
}
catch(e) { // If anything goes wrong, display error in progress bar
if (bar) {
bar.indeterminate = false; // Stop animating
bar.string = e.toString(); // Replace filename with error
}
}
}
}
cd D:\rhino\rhino1_7R5\examples
java -cp ..\js.jar;. org.mozilla.javascript.tools.shell.Main unique.js test1.txt
编写 rhino.bat
@echo off
java -cp D:/rhino/rhino1_7R5/js.jar;. org.mozilla.javascript.tools.shell.Main %*rhino.bat swing1.js
rhino.bat rhinoURLFetcher.js