Java模拟POST请求发送二进制数据

在进行程序之间数据通讯时咱们有时候就须要自定义二进制格式，而后经过HTTP进行二进制数据交互。交互的示例代码以下：java

public static void main(String[] args) { String result = ""; try { String url = "http://localhost:8080/Demo/SiteApi"; URL realUrl = new URL(url); // 打开和URL之间的链接
        URLConnection conn = realUrl.openConnection(); // 设置通用的请求属性
        conn.setRequestProperty("accept", "*/*"); conn.setRequestProperty("connection", "Keep-Alive"); conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)"); conn.setRequestProperty("Content-Type", "application/octet-stream"); // 发送POST请求必须设置以下两行
        conn.setDoOutput(true); conn.setDoInput(true); // 发送请求参数
        DataOutputStream dos=new DataOutputStream(conn.getOutputStream()); String content="I love china"; dos.write(content.getBytes()); // flush输出流的缓冲
 dos.flush(); // 定义BufferedReader输入流来读取URL的响应
        BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream())); String line; while ((line = in.readLine()) != null) { result += line; } System.out.println(result);//打印输出结果
    } catch (Exception e) { System.out.println("异常," + e.getMessage()); e.printStackTrace(); } }

上面是模拟的http请求，若是是https请求，而且咱们本身搭建的https可能证书不合法，所以须要在请求前加上下面的代码：app

javax.net.ssl.HttpsURLConnection.setDefaultHostnameVerifier(new javax.net.ssl.HostnameVerifier() { public boolean verify(String arg0, SSLSession arg1) { if (arg0.equals("119.84.112.220")) { return true; } return false; } });