传值从Java的JavaScript [英] Pass a value to javascript from Java

问题描述

我有以下的Java小程序。它得到了一个用户选择的文件的绝对文件路径：

I have the following Java applet. It gets the absolute file path of a file that a user has selected:

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import javax.swing.*;
import java.awt.Color;
/*
   <OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" 
           width=150 height=100 
 codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Version=1,3,0,0"> 
     <PARAM NAME="code" value="FileApplet.class">
   </OBJECT>
 */

public class fileabs extends JApplet
{
   private JTextField tfCount;
   final JFileChooser fc = new JFileChooser();

  public void init() {
      setBackground(Color.WHITE);
        JPanel p = new JPanel( new FlowLayout(FlowLayout.CENTER, 15, 15));
        p.add(new JLabel("Select File: "));
        tfCount = new JTextField(50);
        tfCount.setEditable(false);
        p.add(tfCount);
        JButton b2 = new JButton("Browse...");
        p.add(b2);
        b2.addActionListener( new ActionListener(){
            public void actionPerformed(ActionEvent ae) {
               tfCount.setText("dsds");
                int returnVal = fc.showOpenDialog(fileabs.this);
                tfCount.setText(fc.getSelectedFile().getAbsolutePath());
            }
        } );

        // p.add(label);
        add(p);
    }
}

不过，我需要能够在另一种语言（蟒蛇/ Django的）发送给表单。我怎么会抢abolsute路径的价值，所以我可以在JavaScript解析呢？现在，我没有访问路径，即使它显示了小程序中。

However, I need to be able to send this to a form in another language (python/django). How would I grab the value of the abolsute path so I can parse it in javascript? Right now, I don't have access to the path, even if it shows within the applet.

推荐答案

您应该考虑使用 LiveConnect的，它允许小程序在页面中使用JavaScript交互，反之亦然。

You should look into using LiveConnect, which allows an applet to interact with JavaScript in a page, and vice versa.

以下code调用全球的JavaScript函数的setpath 在页面与一个参数：

The following code calls the global JavaScript function setPath in the page with a single argument:

netscape.javascript.JSObject.getWindow(appletInstance)
    .call("setPath", new Object[] { path });

小程序必须与参数启动 MAYSCRIPT 设置为真正或 MAYSCRIPT 来被允许使用LiveConnect的。

The applet must be started with the parameter mayscript set to either true or mayscript to be allowed to use LiveConnect.

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