com.gitee.starblues.loader.utils.ResourceUtils Maven / Gradle / Ivy
/**
* Copyright [2019-Present] [starBlues]
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.gitee.starblues.loader.utils;
import java.io.File;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Objects;
import java.util.function.Consumer;
/**
* 资源工具
*
* @author starBlues
* @since 3.0.0
* @version 3.0.0
*/
public class ResourceUtils {
public static final String URL_PROTOCOL_FILE = "file";
public static final String URL_PROTOCOL_JAR_FILE = "jar";
public static final String JAR_FILE_EXTENSION = ".jar";
public static final String ZIP_FILE_EXTENSION = ".zip";
public static final String URL_PROTOCOL_VFSFILE = "vfsfile";
public static final String URL_PROTOCOL_VFS = "vfs";
public static final String PACKAGE_SPLIT = "/";
public static final String CLASS_FILE_EXTENSION = ".class";
private ResourceUtils(){}
/**
* 是否为jar文件
* @param url url
* @return boolean
*/
public static boolean isJarFileUrl(URL url) {
String protocol = url.getProtocol();
boolean extensionIsJar = url.getPath().toLowerCase().endsWith(JAR_FILE_EXTENSION);
return (URL_PROTOCOL_FILE.equals(protocol) && extensionIsJar)
|| (URL_PROTOCOL_JAR_FILE.equals(protocol) || extensionIsJar);
}
/**
* 是否为jar文件
* @param file file
* @return boolean
*/
public static boolean isJarFile(File file) {
return file.getName().toLowerCase().endsWith(JAR_FILE_EXTENSION);
}
/**
* 是否为zip文件
* @param url url
* @return boolean
*/
public static boolean isZipFileUrl(URL url) {
String protocol = url.getProtocol();
boolean extensionIsZip = url.getPath().toLowerCase().endsWith(ZIP_FILE_EXTENSION);
return (URL_PROTOCOL_FILE.equals(protocol) && extensionIsZip);
}
/**
* 是否为jar协议的文件
* @param url url
* @return boolean
*/
public static boolean isJarProtocolUrl(URL url) {
return URL_PROTOCOL_JAR_FILE.equals(url.getProtocol());
}
/**
* 是否为普通文件
* @param url url
* @return boolean
*/
public static boolean isFileUrl(URL url) {
String protocol = url.getProtocol();
return (URL_PROTOCOL_FILE.equals(protocol) || URL_PROTOCOL_VFSFILE.equals(protocol) ||
URL_PROTOCOL_VFS.equals(protocol));
}
/**
* 将资源名称统一格式化为标准格式
* 标准格式为 a/b/c
* @param name 原始资源名称
* @return 标准资源名称
*/
public static String formatStandardName(String name){
if(ObjectUtils.isEmpty(name)) {
return PACKAGE_SPLIT;
}
String[] split = name.split(PACKAGE_SPLIT);
StringBuilder newPath = null;
for (String s : split) {
if ("".equals(s)) {
continue;
}
if (newPath == null) {
newPath = new StringBuilder(s);
} else {
newPath.append(PACKAGE_SPLIT).append(s);
}
}
if(newPath == null || newPath.length() == 0){
return PACKAGE_SPLIT;
}
return newPath.toString();
}
/**
* 释放资源
* @param object 释放资源的对象
*/
public static void release(final Object object) {
release(object, null);
}
/**
* 释放资源
* @param object 释放资源的对象
* @param consumer 释放异常消费
*/
public static void release(final Object object, final Consumer consumer) {
if (object instanceof Release) {
try {
((Release)object).release();
} catch (final Exception e) {
if (consumer != null) {
consumer.accept(e);
}
}
}
}
/**
* 获取存在的url
* @param url url
* @return 存在的URL, 不存在返回nulll
*/
public static URL getExistUrl(URL url){
return getExistUrl(url, null);
}
/**
* 获取存在的url
* @param baseUrl 根url
* @param name 资源名称
* @return 存在的URL, 不存在返回nulll
*/
public static URL getExistUrl(URL baseUrl, String name){
URL url;
try {
if(ObjectUtils.isEmpty(name)){
url = baseUrl;
} else {
url = new URL(baseUrl, name);
}
} catch (MalformedURLException e) {
throw new IllegalArgumentException("非法：" + name);
}
try {
URLConnection uc = url.openConnection();
if (uc instanceof HttpURLConnection) {
HttpURLConnection hconn = (HttpURLConnection)uc;
hconn.setRequestMethod("HEAD");
if (hconn.getResponseCode() >= HttpURLConnection.HTTP_BAD_REQUEST) {
return null;
}
} else {
uc.setUseCaches(false);
InputStream is = uc.getInputStream();
is.close();
}
return url;
} catch (Exception e) {
return null;
}
}
public static boolean isClass(String path){
if(ObjectUtils.isEmpty(path)){
return false;
}
return path.toLowerCase().endsWith(CLASS_FILE_EXTENSION);
}
}