关于从指定Java Web Applet提取Jar文件用于离线使用的技术咨询

Absolutely, you can extract the JAR file from that Java Web Applet for offline use—here's how to do it step by step:

• Step 1: Locate the JAR file via browser dev tools
  Open the target webpage, then hit F12 (or Ctrl+Shift+I on Windows/Linux, Cmd+Opt+I on Mac) to launch your browser's Developer Tools. Switch to the Network tab, refresh the page, and use the filter bar to search for .jar entries. This will reveal the direct URL of the JAR file the applet loads.

• Step 2: Download the JAR file
  Right-click the JAR entry in the Network tab, select "Copy link address", then paste it into your browser's address bar to download the file directly. If you prefer command-line tools, use curl to grab it:

  curl -O [paste-the-copied-jar-url-here]
  

• Step 3: Set up offline execution
  Modern browsers no longer support Java Applets, so you’ll need the legacy appletviewer tool (included in Java 8 and earlier versions):

  1. Create a simple HTML file (e.g., lzw-applet.html) with this structure—replace YourJarFileName.jar and MainAppletClass with values you can find by inspecting the original page’s <applet> tag source:

     <applet code="MainAppletClass" archive="YourJarFileName.jar" width="800" height="600">
     </applet>
     

  2. Run the applet with this command:

     appletviewer lzw-applet.html
     

  Important note: You’ll need Java 8 installed—newer Java releases have completely removed Applet support.

• Step 4: Fetch dependent resources (if required)
  Some applets rely on extra assets like images or data files. Check the Network tab for non-JAR files the page loads, download those too, and place them in the same directory as your JAR and HTML file to match the original file structure.

内容的提问来源于stack exchange，提问作者redha mahir