让Eclipse的TomcatPlugin支持Tomcat 8.x

项目原因，近期要迁移到Eclipse上开发。重新架构，自然打算都用新的版本。发现一个问题：TomcatPlugin已经支持最新的Eclipse 4.4，但Tomcat的版本却只支持到7.x。纠结啊，Tomcat 8.x已经出来许久，用不了岂不是很痛心。于是乎打算深入处理一下。

1，直接用DevloaderTomcat7.jar放到tomcat8.x中运行，提示什么getContainer方法找不到。看来Tomcat8.x的源码改动有点大。貌似只有重新构建DevLoader了。

2，解压DevloaderTomcat7.jar，里面已经包含了工程信息，直接导入Eclipse，修改依赖Jar包目录，可惜没有DevLoader类的源码。没事反编译就行了。

3，修改编译报错的地方。

4，有些地方反编译有些问题，还好Devloader.jar的源码是有的，结合着改了下，OK。

5，重新打JAR包，命名DevloaderTomcat8.jar。

放入Tomcat8.x，一起正常。

何为管理？做人、管人、理事，最重要的是能为兄弟们解决问题。好几个月没写代码了，写两句感觉挺好的。

改后的源码如下：

 package org.apache.catalina.loader;

 import java.io.File;
 import java.io.FileFilter;
 import java.io.FileReader;
 import java.io.IOException;
 import java.io.LineNumberReader;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.StringTokenizer;
 import javax.servlet.ServletContext;
 import org.apache.catalina.LifecycleException;

 public class DevLoader extends WebappLoader {
     private static final String info = "org.apache.catalina.loader.DevLoader/1.0";
     private String webClassPathFile = ".#webclasspath";
     private String tomcatPluginFile = ".tomcatplugin";

     public DevLoader() {
     }

     public DevLoader(ClassLoader parent) {
         super(parent);
     }

     public void startInternal() throws LifecycleException {
         log("Starting DevLoader");

         super.startInternal();

         ClassLoader cl = super.getClassLoader();
         if (!(cl instanceof WebappClassLoader)) {
             logError("Unable to install WebappClassLoader !");
             return;
         }
         WebappClassLoader devCl = (WebappClassLoader) cl;

         List webClassPathEntries = readWebClassPathEntries();
         StringBuffer classpath = new StringBuffer();
         for (Iterator it = webClassPathEntries.iterator(); it.hasNext();) {
             String entry = (String) it.next();
             File f = new File(entry);
             if (f.exists()) {
                 if ((f.isDirectory()) && (!(entry.endsWith("/"))))
                     f = new File(entry + "/");
                 try {
                     URL url = f.toURL();

                     // devCl.addRepository(url.toString());
                     devCl.addURL(url);
                     classpath.append(f.toString() + File.pathSeparatorChar);
                     log("added " + url.toString());
                 } catch (MalformedURLException e) {
                     logError(entry + " invalid (MalformedURL)");
                 }
             } else {
                 logError(entry + " does not exist !");
             }
         }

         String cp = (String) getServletContext().getAttribute("org.apache.catalina.jsp_classpath");
         StringTokenizer tokenizer = new StringTokenizer(cp, File.pathSeparatorChar + "");
         while (tokenizer.hasMoreTokens()) {
             String token = tokenizer.nextToken();

             if ((token.charAt(0) == '/') && (token.charAt(2) == ':')) {
                 token = token.substring(1);
             }
             classpath.append(token + File.pathSeparatorChar);
         }

         getServletContext().setAttribute("org.apache.catalina.jsp_classpath", classpath.toString());
         log("JSPCompiler Classpath = " + classpath);
     }

     protected void log(String msg) {
         System.out.println("[DevLoader] " + msg);
     }

     protected void logError(String msg) {
         System.err.println("[DevLoader] Error: " + msg);
     }

     protected List readWebClassPathEntries() {
         List rc = null;

         File prjDir = getProjectRootDir();
         if (prjDir == null)
             return new ArrayList();

         log("projectdir=" + prjDir.getAbsolutePath());

         rc = loadWebClassPathFile(prjDir);

         if (rc == null)
             rc = new ArrayList();
         return rc;
     }

     protected File getProjectRootDir() {
         File rootDir = getWebappDir();
         FileFilter filter = new FileFilter() {
             public boolean accept(File file) {
                 return (file.getName().equalsIgnoreCase(webClassPathFile) || file.getName().equalsIgnoreCase(tomcatPluginFile));
             }
         };
         while (rootDir != null) {
             File[] files = rootDir.listFiles(filter);
             if ((files != null) && (files.length >= 1))
                 return files[0].getParentFile();

             rootDir = rootDir.getParentFile();
         }
         return null;
     }

     protected List loadWebClassPathFile(File prjDir) {
         File cpFile = new File(prjDir, this.webClassPathFile);
         if (cpFile.exists()) {
             FileReader reader = null;
             try {
                 List rc = new ArrayList();
                 reader = new FileReader(cpFile);
                 LineNumberReader lr = new LineNumberReader(reader);
                 String line = null;
                 while ((line = lr.readLine()) != null) {
                     line = line.replace('\\', '/');
                     rc.add(line);
                 }
                 return rc;
             } catch (IOException ioEx) {
                 if (reader != null)
                     ;
                 return null;
             }
         }
         return null;
     }

     protected ServletContext getServletContext() {
         // return ((Context) getContainer()).getServletContext();
         return this.getContext().getServletContext();
     }

     protected File getWebappDir() {
         File webAppDir = new File(getServletContext().getRealPath("/"));
         return webAppDir;
     }
 }

最后，附DevloaderTomcat8.jar的下载地址： http://download.csdn.net/download/matrix_designer/8244253