教你从头开始用JAVA创建一个自己的简单API并实现第三方调用
public class HttpClientUtil {
public static String doPost(String pathUrl, String data){
OutputStreamWriter out = null;
BufferedReader br = null;
String result = "";
try {
URL url = new URL(pathUrl);
//打开和url之间的连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
//请求方法为"POST"
conn.setRequestMethod("POST");
// 设置是否向httpUrlConnection输出,因为这个是post请求,参数要放在http正文内,因此需要设为true, 默认情况下是false;
conn.setDoOutput(true);
// Post请求不能使用缓存
conn.setUseCaches(false);
//设置请求属性
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive"); //维持长链接
conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
conn.connect();
//调用,获取输出流
out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
//发送请求参数
out.write(data);
out.flush();
//获取URLConnection对象对应的输入流
InputStream is = conn.getInputStream();
//构造一个字符流缓存
br = new BufferedReader(new InputStreamReader(is));
String str = "";
while ((str = br.readLine()) != null){
result += str;
}
System.out.println(result);
//关闭流
is.close();
//断开连接,disconnect是在底层tcp socket链接空闲时才切断,如果正在被其他线程使用就不切断。
conn.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
return result;
}
}