URLConnection 请求头和返回值编码

/**
* 发送post请求
* */
public static String sendPostWb(String url, String param) {
  PrintWriter out = null;
  BufferedReader in = null;
  String result = "";
  System.out.println("请求参数:" + param);
  try {
    URL realUrl = new URL(url);
    // 打开和URL之间的连接
    URLConnection conn = realUrl.openConnection();
    // 设置通用的请求属性
    conn.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

              //设置接受的文件类型,*表示一切可以接受的

    conn.setRequestProperty("accept", "*/*");
    conn.setRequestProperty("connection", "Keep-Alive");
    //TODO 新添加的请求头编码
    conn.setRequestProperty("Accept-Charset", "UTF-8");
    conn.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
    // 发送POST请求必须设置如下两行
    conn.setDoOutput(true);
    conn.setDoInput(true);
    // 获取URLConnection对象对应的输出流
    out = new PrintWriter(conn.getOutputStream());
    // 发送请求参数
    out.print(param);
    // flush输出流的缓冲
    out.flush();
    // 定义BufferedReader输入流来读取URL的响应
    /*in = new BufferedReader(
      new InputStreamReader(conn.getInputStream()));*/
    //TODO 新添加设置,返回编码
    in = new BufferedReader(
      new InputStreamReader(conn.getInputStream(), "utf-8"));
    String line;
    while ((line = in.readLine()) != null) {
      result += line;
    }
  } catch (Exception e) {
    System.out.println("发送 POST 请求出现异常!" + e.toString());
    e.printStackTrace();
  }
  // 使用finally块来关闭输出流、输入流
  finally {
    try {
      if (out != null) {
        out.close();
      }
      if (in != null) {
        in.close();
      }
    } catch (IOException ex) {
      System.out.println("发送 POST 请求出现异常!" + ex.toString());
      ex.printStackTrace();
    }
  }
  return result;
}

posted @ 2017-06-23 10:24  MrLiub  阅读(12352)  评论(0编辑  收藏  举报