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  • 不验证网站证书下载文件

    package com.jm.hsw.tools;
    
    import java.security.cert.CertificateException;
    import java.io.File;
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.URL;
    import java.net.URLConnection;
    import java.nio.file.Files;
    import java.nio.file.Path;
    import java.nio.file.Paths;
    import java.nio.file.StandardCopyOption;
    import java.security.cert.X509Certificate;
    import javax.net.ssl.HostnameVerifier;
    import javax.net.ssl.HttpsURLConnection;
    import javax.net.ssl.SSLContext;
    import javax.net.ssl.SSLSession;
    import javax.net.ssl.SSLSocketFactory;
    import javax.net.ssl.TrustManager;
    import javax.net.ssl.X509TrustManager;
    
    public class HttpsTools {
    
        /**
         *     不验证网站证书下载文件
         *
         * @param urlStr  文件地址
         * @param saveDir 保存到本地的文件夹
         * @param fileName 保存到本地的文件名称
         * @throws Exception
         */
        public static void downloadByNIO2(String urlStr, String fileName, String saveDir) {
            File fileDir = new File(saveDir);
            // 判断文件夹是否存在
            if (!fileDir.exists()) {
                // 如果文件夹不存在,则创建新的的文件夹
                fileDir.mkdirs();
            }
            InputStream ins = null;
            try {
                // 创建SSLContext
                SSLContext sslContext = SSLContext.getInstance("SSL");
                TrustManager[] tm = {new X509TrustManager() {
                    @Override
                    public void checkClientTrusted(X509Certificate[] var1, String var2) throws CertificateException {
                        // TODO Auto-generated method stub
                    }
     
                    @Override
                    public void checkServerTrusted(X509Certificate[] var1, String var2) throws CertificateException {
                        // TODO Auto-generated method stub
                    }
     
                    @Override
                    public X509Certificate[] getAcceptedIssuers() {
                        // TODO Auto-generated method stub
                        return null;
                    }
                }};
                // 初始化
                sslContext.init(null, tm, new java.security.SecureRandom());
                // 获取SSLSocketFactory对象
                SSLSocketFactory ssf = sslContext.getSocketFactory();
                // url对象
                URL url = new URL(urlStr);
                // 打开连接
                URLConnection conn = url.openConnection();
                if (conn instanceof HttpsURLConnection) {
                    HttpsURLConnection connection = (HttpsURLConnection)conn;
                    connection.setHostnameVerifier(new HostnameVerifier() {
                        public boolean verify(String var1, SSLSession var2) {
                            return true;
                        }
                    });
                    // 设置当前实例使用的SSLSoctetFactory
                    connection.setSSLSocketFactory(ssf);
                }
                conn.setDoOutput(true);
                conn.setDoInput(true);
                conn.setUseCaches(false);
                conn.setConnectTimeout(10000);
                conn.setReadTimeout(10000);
                conn.connect();
                ins = conn.getInputStream();
                Path target = Paths.get(saveDir, fileName);
                Files.createDirectories(target.getParent());
                Files.copy(ins, target, StandardCopyOption.REPLACE_EXISTING);
            } catch (Exception e) {
                 e.printStackTrace();
            } finally {
                try {
                    ins.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
    你所拥抱的并不总是拥抱你
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  • 原文地址:https://www.cnblogs.com/java-h/p/14366657.html
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