在java后台书写https的方法

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();
}

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