<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.io.File"%>
<%@ page import="java.net.URI"%>
<%@ page import="java.net.URISyntaxException"%>
<%@ page import="java.net.URL"%>
<%@ page import="java.text.SimpleDateFormat"%>
<%@ page import="java.util.ArrayList"%>
<%@ page import="java.util.Date"%>
<%@ page import="java.util.HashMap"%>
<%@ page import="java.util.List"%>
<%@ page import="java.util.Map"%>
<%@ page import="java.util.StringTokenizer"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%
ClassLoaderInfo cl = new ClassLoaderInfo();
String className = request.getParameter("className");
Map classInfo = null;
if (className != null && className.trim().length() > 0) {
classInfo = cl.getLoadingClassInfo(className);
}
List bootClasses = cl.getBootClassInfos();
List extClasses = cl.getExtClassInfos();
List appClasses = cl.getAppClassInfos();
%>
<html>
<head>
<title>Nextree Classloader Information</title>
<style type="text/css">
.c_title{
font-size:20px;
}
.th_classinfo{
text-align:left;
color:#fff;
background-color:#000;
}
.td_classinfo{
text-align:left;
background-color:#ccc;
}
.th_classloader{
width:700px;
text-align:left;
color:#fff;
background-color:#000;
}
</style>
</head>
<body>
<p class="c_title">Nextree Classloader Information</p>
<form>
Class Name: <input type="text" name="className" size="100"/>
</form>
<% if (classInfo != null && classInfo.get("X_ERROR") != null) {
Throwable t = (Throwable) classInfo.get("X_ERROR");
%>
<p>No such class : <%=t.getClass().getName()%> (<%=t.getMessage()%>)</p>
<% } else if (classInfo != null) { %>
<p>
<table>
<tr>
<th class="th_classinfo">Class Name</th>
<td class="td_classinfo"><%=className%></td>
</tr>
<tr><th class="th_classinfo">Classloaders</th>
<td class="td_classinfo">
<%
List classLoaders = (List) classInfo.get("X_CLASSLOADERS");
for(int i = 0; i < classLoaders.size(); i++) {
String classLoader = (String) classLoaders.get(i);
%>
<%=classLoader%><br>
<% } %>
</td>
</tr>
<tr><th class="th_classinfo">File Name</th><td class="td_classinfo"><%=classInfo.get("X_FILE_NAME")%></td></tr>
<tr><th class="th_classinfo">Modified Date</th><td class="td_classinfo"><%=classInfo.get("X_FILE_DATE")%></td></tr>
</table>
</p>
<% } %>
<p>
<table>
<tr><th class="th_classloader">Boot Classes (from sun.boot.class.path)</th></tr>
<%
for(int i = 0; i < bootClasses.size(); i++) {
String path = (String) bootClasses.get(i);
%>
<tr><td><%=path%></td></tr>
<% } %>
</table>
</p>
<p>
<table>
<tr><th class="th_classloader">Extension Classes (from java.ext.dirs)</th></tr>
<%
for(int i = 0; i < extClasses.size(); i++) {
String path = (String) extClasses.get(i);
%>
<tr><td><%=path%></td></tr>
<% } %>
</table>
</p>
<p>
<table>
<tr><th class="th_classloader">Application Classes (from java.class.path)</th></tr>
<%
for(int i = 0; i < appClasses.size(); i++) {
String path = (String) appClasses.get(i);
%>
<tr><td><%=path%></td></tr>
<% } %>
</table>
</p>
</body>
</html>
<%!
static class ClassLoaderInfo
{
private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
public Map getLoadingClassInfo(String className)
{
Map result = new HashMap();
List cl = null;
try
{
cl = getClassLoadersOfClass(className);
}
catch(Throwable e)
{
result.put("X_ERROR", e);
return result;
}
if(cl != null) result.put("X_CLASSLOADERS", cl);
String resourceName = classNameToResourceName(className);
URL url = getClass().getResource(resourceName);
try
{
result.put("X_FILE_NAME", url.toURI().toString());
File file = getFileFromURI(url.toURI());
if(file.exists())
{
result.put("X_FILE_DATE", sdf.format(new Date(file.lastModified())));
}
}
catch(URISyntaxException e) { }
return result;
}
public File getFileFromURI(URI uri)
{
File result = null;
String schema = uri.getScheme();
if("file".equals(schema))
result = new File(uri);
else
if("zip".equals(schema))
{
String uriStr = uri.getSchemeSpecificPart();
String file = uriStr.substring(0, uriStr.indexOf('!'));
result = new File(file);
} else
if("jar".equals(schema))
{
String uriStr = uri.getSchemeSpecificPart();
String file = uriStr.substring(6, uriStr.indexOf('!'));
result = new File(file);
}
return result;
}
public List getClassLoaderInfos(String className)
{
List result = new ArrayList();
for(ClassLoader cl = getClass().getClassLoader(); cl != null; cl = cl.getParent())
result.add(cl.getClass().getName());
result.add("Bootstrap classloader");
return result;
}
public List getBootClassInfos()
{
return separatePath(System.getProperty("sun.boot.class.path"));
}
public List getExtClassInfos()
{
return getJars(System.getProperty("java.ext.dirs"));
}
public List getAppClassInfos()
{
return separatePath(System.getProperty("java.class.path"));
}
private List separatePath(String classpath)
{
StringTokenizer st = new StringTokenizer(classpath, File.pathSeparator);
List result = new ArrayList();
for(; st.hasMoreTokens(); result.add(st.nextToken()));
return result;
}
private List getClassLoadersOfClass(String className) throws Throwable
{
Class c = Class.forName(className.trim());
List result = new ArrayList();
for(ClassLoader cl = c.getClassLoader(); cl != null; cl = cl.getParent())
result.add(cl.getClass().getName());
result.add("Bootstrap classloader");
return result;
}
private String classNameToResourceName(String className)
{
String resourceName = className;
if(!resourceName.startsWith("/"))
resourceName = (new StringBuilder()).append("/").append(resourceName).toString();
resourceName = resourceName.replace('.', '/');
resourceName = (new StringBuilder()).append(resourceName).append(".class").toString();
return resourceName;
}
private List getJars(String directoryName)
{
File directory = new File(directoryName);
if(!directory.exists())
return new ArrayList();
List result = new ArrayList();
String allFiles[] = directory.list();
if(allFiles != null)
{
for(int i = 0; i < allFiles.length; i++)
if(allFiles[i].endsWith(".jar"))
{
File f = new File(directory, allFiles[i]);
result.add(f.getPath());
}
}
return result;
}
}
%>
last modified 2012-09-27 14:16:06
Processing time 0.0060 sec