最近在对接外部接口时遇到返回的图片所在的服务器全都没有ssl证书，导致在前端直接用img标签展示时图片开裂。于是转为通过后端获取，绕过ssl验证之后转为base64返回。记录一下代码段。

package com.sy.ai.common.utils;import cn.hutool.core.codec.Base64Encoder;
import lombok.extern.slf4j.Slf4j;import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
@Slf4j
public class ImageUtil {public static String imageUrlToBase64(String imgUrl){URL url = null;InputStream is = null;ByteArrayOutputStream outStream = null;HttpURLConnection httpUrl = null;try {// 忽略ssltrustAllHttpsCertificates();HostnameVerifier hv = new HostnameVerifier() {@Overridepublic boolean verify(String s, SSLSession sslSession) {return true;}};HttpsURLConnection.setDefaultHostnameVerifier(hv);url = new URL(imgUrl);httpUrl =(HttpURLConnection) url.openConnection();// 连接超时httpUrl.setConnectTimeout(10000);// 读取超时、服务器响应慢httpUrl.setReadTimeout(10000);httpUrl.connect();is = httpUrl.getInputStream();outStream = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len = 0;while((len = is.read(buffer)) != -1){outStream.write(buffer,0, len);}return "data:image/png;base64," + encode(outStream.toByteArray());} catch (Exception e) {e.printStackTrace();}return null;}public static String encode(byte[] image) {return Base64Encoder.encode(image);}private static void trustAllHttpsCertificates() throws Exception {javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];javax.net.ssl.TrustManager tm = new miTM();trustAllCerts[0] = tm;javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext.getInstance("SSL");sc.init(null, trustAllCerts, null);javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());}static class miTM implements javax.net.ssl.TrustManager, javax.net.ssl.X509TrustManager {@Overridepublic java.security.cert.X509Certificate[] getAcceptedIssuers() {return null;}public boolean isServerTrusted(java.security.cert.X509Certificate[] certs) {return true;}public boolean isClientTrusted(java.security.cert.X509Certificate[] certs) {return true;}@Overridepublic void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType)throws java.security.cert.CertificateException {return;}@Overridepublic void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType)throws java.security.cert.CertificateException {return;}}
}