setbackground参数_setcookie参数

setrequestproperty

设置http请求头

HttpURLConnection.setRequestProperty(String key，String value);

这个我居然都忘记了，哎~真是岁数大了，心好累。。。

例如：下面就是一个完整的原始网络请求方式

HttpURLConnection conn = null;

try {

URL my_url = new URL(log());

//得到connection对象。

conn = (HttpURLConnection) my_url.openConnection();

//允许写出

conn.setDoOutput(true);

//允许读入

conn.setDoinput(true);

//设置请求方式

conn.setRequeSTMethod(“POST”);

conn.setUseCaches(false);

conn.setConnectTimeout(60 * 1000);

conn.setreadTimeout(60 * 1000);

//设置请求头

conn.setRequestProperty(“Charsert”, “UTF-8”);

conn.setRequestProperty(“Content-type”, “application/JSON; charset=UTF-8”);//设置参数类型是json格式

conn.setRequestProperty(“Connection”, “Keep-Alive”);

conn.setRequestProperty(“logType”, “base”);

//连接网络。请求行，请求头的设置必须放在网络连接前

conn.connect();

BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(conn.getOutputStream(), “UTF-8”));

writer.write(String.valueOf(hashMap));

writer.close();

//得到响应码

int responseCode = conn.getResponseCode();

MyLogcat.e(“网络传输” + responseCode + “***” + conn.getResponseMessage() + String.valueOf(hashMap));

if (responseCode == 200) {

//得到响应流

InputStream inputStream = conn.getInputStream();

//将响应流转换成字符串

String returnLine = getStringFROMInputStream(inputStream);

String str = “Success” + conn.getResponseCode() + “—” + conn.getResponseMessage() + “—” + returnLine;

} else {

String str = “ERROR” + conn.getResponseCode() + “—” + conn.getResponseMessage();

}

} catch (Exception e) {

e.printStackTrace();

} finally {

if (conn != null) {

conn.disconnect();

}

}

/**

* 通过字节输入流返回一个字符串信息

*/

private static String getStringFromInputStream(InputStream is) throws Exception {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

byte[] buffer = new byte[1024];

int len = 0;

while ((len = is.read(buffer)) != -1) {

baos.write(buffer, 0, len);

}

is.close();

// 把流中的数据转换成字符串, 采用的编码是: utf-8

String Status = baos.toString();

baos.close();

return status;

}

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在Android项目中使用到了HttpURLConnection请求资源，对于其中的方法setRequestProperty()的调用顺序有些疑惑。API注释如下所示：即：