java https安全传输

HttpsURLConnection 扩展 HttpURLConnection，支持各种特定于 https 功能。此类使用 HostnameVerifier 和 SSLSocketFactory。为这两个类都定义了默认实现。但是，可以根据每个类（静态的）或每个实例来替换该实现。所有新 HttpsURLConnection 实例在创建时将被分配“默认的”静态值，通过在连接前调用每个实例适当的 set 方法可以重写这些值

在URL前加https://前缀表明是用SSL加密的。你的电脑与服务器之间收发的信息传输将更加安全。

Web服务器启用SSL需要获得一个服务器证书并将该证书与要使用SSL的服务器绑定。
http和https使用的是完全不同的连接方式,用的端口也不一样,前者是80,后者是443。http的连接很简单,是无状态的,...

HTTPS协议是由SSL+HTTP协议构建的可进行加密传输、身份认证的网络协议
要比http协议安全
[java]
import java.io.*;
import java.net.*;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;

public class HttpsURLConnectionTest {

    private String url = "<A href="http://127.0.0.1:8080/TestWeb/version">https://127.0.0.1:8080/TestWeb/version</A>";
    private myX509TrustManager xtm = new myX509TrustManager();

    private myHostnameVerifier hnv = new myHostnameVerifier();

    public HttpsURLConnectionTest() {
        SSLContext sslContext = null;
        try {
            sslContext = SSLContext.getInstance("TLS"); //或SSL
            X509TrustManager[] xtmArray = new X509TrustManager[] {xtm};
            sslContext.init(null, xtmArray, new java.security.SecureRandom());
        } catch (GeneralSecurityException e) {
            e.printStackTrace();
        }
        if (sslContext != null) {
            HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());
        }
        HttpsURLConnection.setDefaultHostnameVerifier(hnv);
    }

    public void run() {
        HttpsURLConnection urlCon = null;
        try {
            urlCon = (HttpsURLConnection)(new URL(url)).openConnection();
            urlCon.setDoOutput(true);
            urlCon.setRequestMethod("POST");
            urlCon.setRequestProperty("Content-Length", "1024");
            urlCon.setUseCaches(false);
            urlCon.setDoInput(true);
            urlCon.getOutputStream().write("Data={\"type\":\"P003\"}".getBytes("gbk"));
            urlCon.getOutputStream().flush();
            urlCon.getOutputStream().close();
            BufferedReader in = new BufferedReader(new InputStreamReader(urlCon.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
            // 增加自己的代码
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        HttpsURLConnectionTest httpsTest = new HttpsURLConnectionTest();
        httpsTest.run();
    }
}

/** *//**
* 重写三个方法
* @author Administrator
*
*/
class myX509TrustManager implements X509TrustManager {

    public void checkClientTrusted(X509Certificate[] chain, String authType) {
    }

    public void checkServerTrusted(X509Certificate[] chain, String authType) {
        System.out.println("cert: " + chain[0].toString() + ", authType: " + authType);
    }

    public X509Certificate[] getAcceptedIssuers() {
        return null;
    }
}

/** *//**
* 重写一个方法
* @author Administrator
*
*/
class myHostnameVerifier implements HostnameVerifier {

    public boolean verify(String hostname, SSLSession session) {
        System.out.println("Warning: URL Host: " + hostname + " vs. " + session.getPeerHost());
        return true;
    }
}

补充：综合编程 , 安全编程 ,