下面列出了怎么用java.lang.ClassLoader的API类实例代码及写法，或者点击链接到github查看源代码。
@Override
public void addUrlsTo(WebSitemapGenerator generator) {
String baseUrl = configuration.getString("sitemap.baseUrl");
ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
Reflections reflections = new Reflections("controllers", new MethodAnnotationsScanner());
Set<Method> actions = reflections.getMethodsAnnotatedWith(SitemapItem.class);
for(Method method : actions) {
String actionUrl = actionUrl(classLoader, method);
SitemapItem annotation = method.getAnnotation(SitemapItem.class);
if(annotation != null) {
WebSitemapUrl url = webSitemapUrl(baseUrl, actionUrl, annotation);
generator.addUrl(url);
}
}
}
static ClassLoader getContextClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getSystemClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = ClassLoader.getSystemClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getParentClassLoader(final ClassLoader cl) {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader parent = null;
try {
parent = cl.getParent();
} catch (SecurityException ex) {
}
// eliminate loops in case of the boot
// ClassLoader returning itself as a parent
return (parent == cl) ? null : parent;
}
});
}
public static InputStream getResourceAsStream(final ClassLoader cl,
final String name) {
return (InputStream) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
InputStream ris;
if (cl == null) {
ris = Object.class.getResourceAsStream("/" + name);
} else {
ris = cl.getResourceAsStream(name);
}
return ris;
}
});
}
/**
* Figure out which ClassLoader to use.
*/
public static ClassLoader findClassLoader()
{
if (System.getSecurityManager()!=null) {
//this will ensure bootclassloader is used
return null;
} else {
return SecuritySupport.class.getClassLoader();
}
}
static ClassLoader getContextClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getSystemClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = ClassLoader.getSystemClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getParentClassLoader(final ClassLoader cl) {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader parent = null;
try {
parent = cl.getParent();
} catch (SecurityException ex) {
}
// eliminate loops in case of the boot
// ClassLoader returning itself as a parent
return (parent == cl) ? null : parent;
}
});
}
public static InputStream getResourceAsStream(final ClassLoader cl,
final String name) {
return (InputStream) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
InputStream ris;
if (cl == null) {
ris = Object.class.getResourceAsStream("/" + name);
} else {
ris = cl.getResourceAsStream(name);
}
return ris;
}
});
}
/**
* Figure out which ClassLoader to use.
*/
public static ClassLoader findClassLoader()
{
if (System.getSecurityManager()!=null) {
//this will ensure bootclassloader is used
return null;
} else {
return SecuritySupport.class.getClassLoader();
}
}
static ClassLoader getContextClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getSystemClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = ClassLoader.getSystemClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getParentClassLoader(final ClassLoader cl) {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader parent = null;
try {
parent = cl.getParent();
} catch (SecurityException ex) {
}
// eliminate loops in case of the boot
// ClassLoader returning itself as a parent
return (parent == cl) ? null : parent;
}
});
}
public static InputStream getResourceAsStream(final ClassLoader cl,
final String name) {
return (InputStream) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
InputStream ris;
if (cl == null) {
ris = Object.class.getResourceAsStream("/" + name);
} else {
ris = cl.getResourceAsStream(name);
}
return ris;
}
});
}
/**
* Figure out which ClassLoader to use.
*/
public static ClassLoader findClassLoader()
{
if (System.getSecurityManager()!=null) {
//this will ensure bootclassloader is used
return null;
} else {
return SecuritySupport.class.getClassLoader();
}
}
static ClassLoader getContextClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getSystemClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = ClassLoader.getSystemClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getParentClassLoader(final ClassLoader cl) {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader parent = null;
try {
parent = cl.getParent();
} catch (SecurityException ex) {
}
// eliminate loops in case of the boot
// ClassLoader returning itself as a parent
return (parent == cl) ? null : parent;
}
});
}
public static InputStream getResourceAsStream(final ClassLoader cl,
final String name) {
return (InputStream) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
InputStream ris;
if (cl == null) {
ris = Object.class.getResourceAsStream("/" + name);
} else {
ris = cl.getResourceAsStream(name);
}
return ris;
}
});
}
/**
* Figure out which ClassLoader to use.
*/
public static ClassLoader findClassLoader()
{
if (System.getSecurityManager()!=null) {
//this will ensure bootclassloader is used
return null;
} else {
return SecuritySupport.class.getClassLoader();
}
}
static ClassLoader getContextClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getSystemClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = ClassLoader.getSystemClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getParentClassLoader(final ClassLoader cl) {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader parent = null;
try {
parent = cl.getParent();
} catch (SecurityException ex) {
}
// eliminate loops in case of the boot
// ClassLoader returning itself as a parent
return (parent == cl) ? null : parent;
}
});
}
public static InputStream getResourceAsStream(final ClassLoader cl,
final String name) {
return (InputStream) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
InputStream ris;
if (cl == null) {
ris = Object.class.getResourceAsStream("/" + name);
} else {
ris = cl.getResourceAsStream(name);
}
return ris;
}
});
}
/**
* Figure out which ClassLoader to use.
*/
public static ClassLoader findClassLoader()
{
if (System.getSecurityManager()!=null) {
//this will ensure bootclassloader is used
return null;
} else {
return SecuritySupport.class.getClassLoader();
}
}
static ClassLoader getContextClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getSystemClassLoader() {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader cl = null;
try {
cl = ClassLoader.getSystemClassLoader();
} catch (SecurityException ex) {
}
return cl;
}
});
}
static ClassLoader getParentClassLoader(final ClassLoader cl) {
return (ClassLoader) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
ClassLoader parent = null;
try {
parent = cl.getParent();
} catch (SecurityException ex) {
}
// eliminate loops in case of the boot
// ClassLoader returning itself as a parent
return (parent == cl) ? null : parent;
}
});
}
public static InputStream getResourceAsStream(final ClassLoader cl,
final String name) {
return (InputStream) AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
InputStream ris;
if (cl == null) {
ris = Object.class.getResourceAsStream("/" + name);
} else {
ris = cl.getResourceAsStream(name);
}
return ris;
}
});
}