NewInstance

JDK 1.5 Javadocs zip file is 45MB compressed, and 235MB uncompressed. If you’d like to browse its content without uncompress it, you can use following servlet:

 1public class JavadocSampleServlet extends HttpServlet {
 2    private static final String JAVADOC_LOCATION =
 3        "D:/Java/docs/jdk-1_5_0-doc.zip";
 4    protected void doGet(HttpServletRequest req, HttpServletResponse res)
 5        throws ServletException, IOException {
 6        String resource = req.getPathInfo();
 7        if (resource == null || "/".equals(resource))
 8            resource = "/index.html";
 9        URL url = new URL("jar:file:///" + JAVADOC_LOCATION +
10                          "!/docs" + resource);
11        URLConnection conn = url.openConnection();
12        InputStream input = null;
13        OutputStream output = null;
14        try {
15            input = conn.getInputStream();
16            output = res.getOutputStream();
17            int c;
18            while ((c = input.read()) != -1) output.write(c);
19            output.flush();
20        } finally {
21            if (input != null) input.close();
22            if (output != null) output.close();
23        }
24    }
25}

Set up the constant JAVADOC_LOCATION with proper javadoc file path on your disk.
Here’s the servlet mapping:

 1<?xml version="1.0" encoding="UTF-8"?>
 2<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
 3<web-app>
 4    <servlet>
 5        <servlet-name>javadoc</servlet-name>
 6        <servlet-class>
 7            it.newinstance.sample.JavadocSampleServlet
 8        </servlet-class>
 9    </servlet>
10    <servlet-mapping>
11        <servlet-name>javadoc</servlet-name>
12        <url-pattern>/javadoc/*</url-pattern>
13    </servlet-mapping>
14</web-app>

Configure it in your tomcat and go for the URL:
http://localhost:8080/${yourContextName}/javadoc/
and enjoy.

You’ve saved 190MB of disk space

Notice the new feature of colored sources on my blog: I used this post to test if it works correctly. This weekend I wrote my parser to convert java sources to html. Seems good, isn’t that?