java根据url获取文件流

最近的一个需求需要根据一个mp3的链接获取文件流上传到内部的存储平台，
记录一下获取文件流的代码吧。
pom文件

        <dependency><groupId>org.apache.thrift</groupId><artifactId>libthrift</artifactId><version>0.8.0</version></dependency>

代码：

package com.example.demo.service;import lombok.extern.slf4j.Slf4j;
import org.apache.http.HttpEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.config.Registry;
import org.apache.http.config.RegistryBuilder;
import org.apache.http.conn.socket.ConnectionSocketFactory;
import org.apache.http.conn.socket.LayeredConnectionSocketFactory;
import org.apache.http.conn.socket.PlainConnectionSocketFactory;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.ssl.SSLContexts;
import org.apache.http.util.ByteArrayBuffer;
import org.springframework.stereotype.Service;
import org.springframework.util.Assert;import javax.net.ssl.SSLContext;
import java.io.ByteArrayInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;/*** @Author:luobinghan*/
@Service
@Slf4j
public class HttpService {private int maxConnections = 500;private int maxConnectionsPerRoute = 100;private static final int DEFAULT_BUFFER_SIZE = 4096;private CloseableHttpClient httpStreamClient;public HttpService() {try {this.httpStreamClient = HttpClients.custom().setConnectionManager(getManager(getSslSocketFactory())).disableAutomaticRetries().build();} catch (Exception e) {log.error("init httpStreamClient error");}}/*** 获取url链接内容* @param url* @return*/public ByteBuffer getUrl(String url) {HttpEntity entity = null;try {entity = httpGet(url);} catch (Exception e) {return null;}try {ByteBuffer bytes = getBytesFromHttpRsp(entity);return bytes;} catch (Exception e) {return null;}}private PoolingHttpClientConnectionManager getManager(LayeredConnectionSocketFactory sslSocketFactory) {ConnectionSocketFactory plainSocketFactory = PlainConnectionSocketFactory.getSocketFactory();Registry<ConnectionSocketFactory> registry = RegistryBuilder.<ConnectionSocketFactory>create().register("http", plainSocketFactory).register("https", sslSocketFactory).build();PoolingHttpClientConnectionManager manager = new PoolingHttpClientConnectionManager(registry);manager.setMaxTotal(this.maxConnections);manager.setDefaultMaxPerRoute(this.maxConnectionsPerRoute);return manager;}private LayeredConnectionSocketFactory getSslSocketFactory() throws Exception {SSLContext sslContext = SSLContexts.custom().loadTrustMaterial((chain, authType) -> true).build();return new SSLConnectionSocketFactory(sslContext, new String[]{"SSLv2Hello", "SSLv3", "TLSv1","TLSv1.1", "TLSv1.2" }, null,NoopHostnameVerifier.INSTANCE);}private HttpEntity httpGet(String url) throws Exception {return httpStreamClient.execute(new HttpGet(url)).getEntity();}private ByteBuffer getBytesFromHttpRsp(org.apache.http.HttpEntity entity) throws Exception {final InputStream inputStream = entity.getContent();try {int capacity = (int)entity.getContentLength();if (capacity <= 0) {capacity = DEFAULT_BUFFER_SIZE;}final ByteArrayBuffer buffer = new ByteArrayBuffer(capacity);final byte[] tmp = new byte[DEFAULT_BUFFER_SIZE];int bytesRead;while((bytesRead = inputStream.read(tmp)) != -1) {buffer.append(tmp, 0, bytesRead);}return ByteBuffer.wrap(buffer.toByteArray());} finally {inputStream.close();}}public static void main(String[] args) {String url = "xxx";HttpService httpService = new HttpService();byte[] bytes = httpService.getUrl(url).array();InputStream inputStream =  new ByteArrayInputStream(bytes);}
}

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