Java Resource Get getResource(String name)

Description

get Resource

License

Apache License

Declaration

public static File getResource(String name) throws Exception 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URL;

public class Main {
    public static File getResource(String name) throws Exception {
        URI uri = locate(name);/*from  w  w w  . j av  a  2s.  c  o  m*/
        if (uri == null) {
            return null;
        }
        return new File(uri);
    }

    private static URI locate(String name) throws Exception {
        if (name == null) {
            // undefined, always return null
            return null;
        }
        URI uri = null;
        // attempt to create an URL directly
        try {
            uri = new URI(name);
            // check if the file exists
            InputStream in = null;
            try {
                in = uri.toURL().openStream();
            } finally {
                if (in != null) {
                    in.close();
                }
            }
        } catch (IOException e) {
            uri = null;
        }

        // attempt to load from an absolute path
        if (uri == null) {
            File file = new File(name);
            if (file.isAbsolute() && file.exists()) { // already absolute?
                uri = file.toURI();
            }
        }

        // attempt to load from the base directory
        if (uri == null) {
            File file = new File(name);
            if (file != null && file.exists()) {
                uri = file.toURI();
            }
        }

        // attempt to load from the user home directory
        if (uri == null) {
            File file = new File(System.getProperty("user.home"), name);
            if (file != null && file.exists()) {
                uri = file.toURI();
            }
        }

        // attempt to load from classpath
        if (uri == null) {
            URL url = null;
            // attempt to load from the context classpath
            ClassLoader loader = Thread.currentThread().getContextClassLoader();
            if (loader != null) {
                url = loader.getResource(name);
            }
            // attempt to load from the system classpath
            if (url == null) {
                url = ClassLoader.getSystemResource(name);
            }
            if (url != null) {
                uri = url.toURI();
            }
        }
        return uri;
    }
}

Related

1. getResource(String inResource)
2. getResource(String key, String bundleName, Locale locale)
3. getResource(String name)
4. getResource(String name)
5. getResource(String name)
6. getResource(String name)
7. getResource(String name)
8. getResource(String name)
9. getResource(String name)