JAVA：使用HttpURLConnection添加头部header信息并进行httpget请求

公用方法

import java.net.HttpURLConnection;

/**
     * HttpGet请求
     * @param vurl:请求地址,map:{头部信息}
     * @return 返回消息
     */
    public static String httpGet(String vurl,HashMap<String, Object> map) {
        try {
            URL url = new URL(vurl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            for (Map.Entry item : map.entrySet()) {
                connection.setRequestProperty(item.getKey().toString(),item.getValue().toString());//设置header
            }
            InputStream in = connection.getInputStream();
            InputStreamReader isr = new InputStreamReader(in, "utf-8");
            BufferedReader br = new BufferedReader(isr);
            String line;
            StringBuilder sb = new StringBuilder();
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
            br.close();
            isr.close();
            in.close();
            return sb.toString();
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

使用示例

我们一般会在头部添加认证信息，如token值或BasicAuth认证的 Authorization值

HashMap<String, Object> tmap = new HashMap<String, Object>();
tmap.put("Authorization",authorization);//tmap.put("token","tonken值");
String vmsg= Comm.httpGet(vurl,tmap);//获取请求的返回结果