java后台访问接口

// 发送url地址获取信息
    public static String sendPost(String jsonStr, String path) {
        String msg = "";// 保存调用http服务后的响应信息
        try {
            byte[] data = jsonStr.getBytes();
            java.net.URL url = new java.net.URL(path);
            java.net.HttpURLConnection conn = (java.net.HttpURLConnection) url
                    .openConnection();
            conn.setRequestMethod("GET");
            conn.setConnectTimeout(5 * 1000);// 设置连接超时时间为5秒
            conn.setReadTimeout(20 * 1000);// 设置读取超时时间为20秒
            conn.setDoInput(true); // 设置输入流采用字节流
            conn.setDoOutput(true); // 设置输出流采用字节流
            conn.setUseCaches(false); // 设置缓存
            conn.setRequestProperty("Content-Type",
                    "application/x-www-form-urlencoded");
            conn.setRequestProperty("Charset", "utf-8");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            // conn.setRequestProperty("Content-Encoding", "gzip");
            conn.setRequestProperty("Content-Length",
                    String.valueOf(data.length));
            /*
             * DataOutputStream out = new
             * DataOutputStream(conn.getOutputStream());
             * out.writeBytes(jsonStr); out.close();
             */
            OutputStream outStream = conn.getOutputStream();// 返回写入到此连接的输出流
            outStream.write(data);
            outStream.close();// 关闭流

            String temp;
            // 如果请求响应码是200，则表示成功
            if (conn.getResponseCode() == 200) {
                // HTTP服务端返回的编码是UTF-8,故必须设置为UTF-8,保持编码统一,否则会出现中文乱码
                BufferedReader in = new BufferedReader(new InputStreamReader(
                        conn.getInputStream(), "utf-8"));
                while ((temp = in.readLine()) != null) {
                    System.out.println(temp);
                    msg += temp;
                }
                // msg = in.readLine();
                in.close();
            }
            conn.disconnect();// 断开连接
        } catch (Exception e) {
        }
        return msg;
    }