java 发送http和https请求的实例

HTTP请求：

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//处理http请求 requestUrl为请求地址 requestMethod请求方式，值为"GET"或"POST"   public static String httpRequest(String requestUrl,String requestMethod,String outputStr){     StringBuffer buffer=null;     try{     URL url=new URL(requestUrl);     HttpURLConnection conn=(HttpURLConnection)url.openConnection();     conn.setDoOutput(true);     conn.setDoInput(true);     conn.setRequestMethod(requestMethod);     conn.connect();     //往服务器端写内容 也就是发起http请求需要带的参数     if(null!=outputStr){       OutputStream os=conn.getOutputStream();       os.write(outputStr.getBytes("utf-8"));       os.close();     }     //读取服务器端返回的内容     InputStream is=conn.getInputStream();     InputStreamReader isr=new InputStreamReader(is,"utf-8");     BufferedReader br=new BufferedReader(isr);     buffer=new StringBuffer();     String line=null;     while((line=br.readLine())!=null){       buffer.append(line);     }     }catch(Exception e){       e.printStackTrace();     }     return buffer.toString();   } 

HTTPS请求：

1、https和http的区别我这里就不介绍了，在java 中访问https链接的话需要有相应的SSL证书，如果没有就无法访问（使用http访问https会返回403），所以我们要先自定义一个信任管理器。实现java自带的X509TrustManger接口，代码：

import java.security.cert.CertificateException; import java.security.cert.X509Certificate; import javax.net.ssl.X509TrustManager; public class MyX509TrustManager implements X509TrustManager {   @Override   public void checkClientTrusted(X509Certificate[] chain, String authType)       throws CertificateException {     // TODO Auto-generated method stub   }   @Override   public void checkServerTrusted(X509Certificate[] chain, String authType)       throws CertificateException {     // TODO Auto-generated method stub   }   @Override   public X509Certificate[] getAcceptedIssuers() {     // TODO Auto-generated method stub     return null;   } } 

2、然后我们就可以使用https请求了：

/*  * 处理https GET/POST请求  * 请求地址、请求方法、参数  * */ public static String httpsRequest(String requestUrl,String requestMethod,String outputStr){   StringBuffer buffer=null;   try{   //创建SSLContext   SSLContext sslContext=SSLContext.getInstance("SSL");   TrustManager[] tm={new MyX509TrustManager()};   //初始化   sslContext.init(null, tm, new java.security.SecureRandom());;   //获取SSLSocketFactory对象   SSLSocketFactory ssf=sslContext.getSocketFactory();   URL url=new URL(requestUrl);   HttpsURLConnection conn=(HttpsURLConnection)url.openConnection();   conn.setDoOutput(true);   conn.setDoInput(true);   conn.setUseCaches(false);   conn.setRequestMethod(requestMethod);   //设置当前实例使用的SSLSoctetFactory   conn.setSSLSocketFactory(ssf);   conn.connect();   //往服务器端写内容   if(null!=outputStr){     OutputStream os=conn.getOutputStream();     os.write(outputStr.getBytes("utf-8"));     os.close();   }   //读取服务器端返回的内容   InputStream is=conn.getInputStream();   InputStreamReader isr=new InputStreamReader(is,"utf-8");   BufferedReader br=new BufferedReader(isr);   buffer=new StringBuffer();   String line=null;   while((line=br.readLine())!=null){     buffer.append(line);   }   }catch(Exception e){     e.printStackTrace();   }   return buffer.toString(); } 

以上这篇java 发送http和https请求的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持武林网。