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hbatis is a simple orm framework
package cn.sylinx.hbatis.io;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.net.URL;
import java.net.URLConnection;
import java.nio.charset.Charset;
import java.util.List;
import java.util.Properties;
/**
* 资源常用类
*
* @author han
*
*/
public class Resources {
private static ClassLoaderWrapper classLoaderWrapper = new ClassLoaderWrapper();
private static Charset charset;
Resources() {
}
/**
* get the default classloader
*
* @return the classloader
*/
public static ClassLoader getDefaultClassLoader() {
return classLoaderWrapper.defaultClassLoader;
}
/**
* Sets the default classloader
*
* @param defaultClassLoader
* - the new default ClassLoader
*/
public static void setDefaultClassLoader(ClassLoader defaultClassLoader) {
classLoaderWrapper.defaultClassLoader = defaultClassLoader;
}
/**
* Returns the URL of the resource on the classpath
*
* @param resource
* The resource to find
*
* @return The resource
*
* @throws java.io.IOException
* If the resource cannot be found or read
*/
public static URL getResourceURL(String resource) throws IOException {
return getResourceURL(null, resource);
}
public static List getResourceURLs(String resource) throws IOException {
return getResourceURLs(null, resource);
}
/**
* Returns the URL of the resource on the classpath
*
* @param loader
* classloader
* @param resource
* The resource to find
* @return The resource
* @throws java.io.IOException
* If the resource cannot be found or read
*/
public static URL getResourceURL(ClassLoader loader, String resource) throws IOException {
URL url = classLoaderWrapper.getResourceAsURL(resource, loader);
if (url == null) {
throw new IOException("Could not find resource " + resource);
}
return url;
}
public static List getResourceURLs(ClassLoader loader, String resource) throws IOException {
if(resource.startsWith("/")) {
resource = resource.substring(1, resource.length());
}
List urlList = classLoaderWrapper.getResourceAsURLs(resource, loader);
if (urlList == null || urlList.isEmpty()) {
throw new IOException("Could not find resource " + resource);
}
return urlList;
}
/**
* Returns the InputStream of the resource on the classpath
*
* @param resource
* the resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static InputStream getResourceAsStream(String resource) throws IOException {
return getResourceAsStream(null, resource);
}
/**
* returns the InputStream of the resource on the classpath
*
* @param loader
* The Classloader
* @param resource
* The resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static InputStream getResourceAsStream(ClassLoader loader, String resource) throws IOException {
InputStream in = classLoaderWrapper.getResourceAsStream(resource, loader);
if (in == null) {
throw new IOException("Could not find resource " + resource);
}
return in;
}
/**
* return the Properties of the resource on the classpath
*
* @param resource
* the resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static Properties getResourceAsProperties(String resource) throws IOException {
Properties props = new Properties();
InputStream in = getResourceAsStream(resource);
props.load(in);
in.close();
return props;
}
/**
* return the Properties of the resource on the classpath
*
* @param loader
* classloader
* @param resource
* the resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static Properties getResourceAsProperties(ClassLoader loader, String resource) throws IOException {
Properties props = new Properties();
InputStream in = getResourceAsStream(loader, resource);
props.load(in);
in.close();
return props;
}
/**
* return the Reader of the resource on the classpath
*
* @param resource
* the resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static Reader getResourceAsReader(String resource) throws IOException {
Reader reader;
if (charset == null) {
reader = new InputStreamReader(getResourceAsStream(resource));
} else {
reader = new InputStreamReader(getResourceAsStream(resource), charset);
}
return reader;
}
/**
* return the Reader of the resource on the classpath
*
* @param loader
* ClassLoader
* @param resource
* the resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static Reader getResourceAsReader(ClassLoader loader, String resource) throws IOException {
Reader reader;
if (charset == null) {
reader = new InputStreamReader(getResourceAsStream(loader, resource));
} else {
reader = new InputStreamReader(getResourceAsStream(loader, resource), charset);
}
return reader;
}
/**
* return the File of the resource on the classpath
*
* @param resource
* the resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static File getResourceAsFile(String resource) throws IOException {
return new File(getResourceURL(resource).getFile());
}
/**
* return the File of the resource on the classpath
*
* @param loader
* ClassLoader
* @param resource
* the resource to find
* @return the resource
* @throws IOException
* If the resource cannot be found or read
*/
public static File getResourceAsFile(ClassLoader loader, String resource) throws IOException {
return new File(getResourceURL(loader, resource).getFile());
}
/**
* return the InputStream of the url
*
* @param urlString
* url string
* @return the InputStream
* @throws IOException
* If the url cannot be found or read
*/
public static InputStream getUrlAsStream(String urlString) throws IOException {
URL url = new URL(urlString);
URLConnection conn = url.openConnection();
return conn.getInputStream();
}
/**
* return the Reader of the url
*
* @param urlString
* url String
* @return the Reader of url
* @throws IOException
* If the url cannot be found or read
*/
public static Reader getUrlAsReader(String urlString) throws IOException {
Reader reader;
if (charset == null) {
reader = new InputStreamReader(getUrlAsStream(urlString));
} else {
reader = new InputStreamReader(getUrlAsStream(urlString), charset);
}
return reader;
}
/**
* return the Properties of url
*
* @param urlString
* url string
* @return the Properties
* @throws IOException
* If the url cannot be found or read
*/
public static Properties getUrlAsProperties(String urlString) throws IOException {
Properties props = new Properties();
InputStream in = getUrlAsStream(urlString);
props.load(in);
in.close();
return props;
}
/**
* return the Class of the classname
*
* @param className
* the classname
* @return the Class
* @throws ClassNotFoundException
* If the class cannot be found or read
*/
public static Class classForName(String className) throws ClassNotFoundException {
return classLoaderWrapper.classForName(className);
}
/**
* get the Charset
*
* @return the Charset
*/
public static Charset getCharset() {
return charset;
}
/**
* set the Charset
*
* @param charset
* Charset
*/
public static void setCharset(Charset charset) {
Resources.charset = charset;
}
}