用HttpURLConnection請求之post/get及多檔案上傳寫法

Java · 發表 2018-10-30 11:40:20

摘要：目錄： 1、post和get請求 2、使用HttpURLConnection請求multipart/form-data型別的form提交 1、post和get請求 public class HttpConnectionUtil { ...

1、post和get請求

2、使用HttpURLConnection請求multipart/form-data型別的form提交

1、post和get請求

public class HttpConnectionUtil {
public static HttpConnectionUtil http = new HttpConnectionUtil();

public static HttpConnectionUtil getHttp() {
return http;
}

public String getRequset(final String url) {
final StringBuilder sb = new StringBuilder();
FutureTask<String> task = new FutureTask<String>(new Callable<String>() {
@Override
public String call() throws Exception {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL requestUrl = new URL(url);
connection = (HttpURLConnection) requestUrl.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(8000);
connection.setReadTimeout(8000);
if (connection.getResponseCode() == 200) {
InputStream in = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
System.out.println(sb);

}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();
}
if (connection != null) {
connection.disconnect();//斷開連線，釋放資源
}
}
return sb.toString();
}
});
new Thread(task).start();
String s = null;
try {
s = task.get();
} catch (Exception e) {
e.printStackTrace();
}
return s;
}

public String postRequset(final String url, final Map<String, String> map) {
final StringBuilder sb = new StringBuilder();
FutureTask<String> task = new FutureTask<String>(new Callable<String>() {
@Override
public String call() throws Exception {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
URL requestUrl = new URL(url);
connection = (HttpURLConnection) requestUrl.openConnection();
connection.setRequestMethod("POST");
connection.setConnectTimeout(8000);//連結超時
connection.setReadTimeout(8000);//讀取超時
//傳送post請求必須設定
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.setInstanceFollowRedirects(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
DataOutputStream out = new DataOutputStream(connection
.getOutputStream());
StringBuilder request = new StringBuilder();
for (String key : map.keySet()) {
request.append(key + "=" + URLEncoder.encode(map.get(key), "UTF-8") + "&");
}
out.writeBytes(request.toString());//寫入請求引數
out.flush();
out.close();
if (connection.getResponseCode() == 200) {
InputStream in = connection.getInputStream();
reader = new BufferedReader(new InputStreamReader(in));
String line;
while ((line = reader.readLine()) != null) {
sb.append(line);
}
System.out.println(sb);

}
} catch (Exception e) {
e.printStackTrace();
} finally {
if (reader != null) {
reader.close();//關閉流
}
if (connection != null) {
connection.disconnect();//斷開連線，釋放資源
}
}
return sb.toString();
}
});
new Thread(task).start();
String s = null;
try {
s = task.get();
} catch (Exception e) {
e.printStackTrace();
}
return s;
}

}

2、multipart/form-data型別的form提交

/**
 * Java原生的API可用於傳送HTTP請求，即java.net.URL、java.net.URLConnection，這些API很好用、很常用，
 * 但不夠簡便；
 * 
 * 1.通過統一資源定位器（java.net.URL）獲取聯結器（java.net.URLConnection） 2.設定請求的引數 3.傳送請求
 * 4.以輸入流的形式獲取返回內容 5.關閉輸入流
 * 
 * @author H__D
 *
 */
public class HttpConnectionFileUtils {


/**
* 多檔案上傳的方法
* 
* @param actionUrl：上傳的路徑
* @param uploadFilePaths：需要上傳的檔案路徑，陣列
* @return
*/
@SuppressWarnings("finally")
public static String uploadFile(String actionUrl, String[] uploadFilePaths) {
String end = "\r\n";
String twoHyphens = "--";
String boundary = "abcdefghijk";

DataOutputStream ds = null;
InputStream inputStream = null;
InputStreamReader inputStreamReader = null;
BufferedReader reader = null;
StringBuffer resultBuffer = new StringBuffer();
String tempLine = null;

try {
// 統一資源
URL url = new URL(actionUrl);
// 連線類的父類，抽象類
URLConnection urlConnection = url.openConnection();
// http的連線類
HttpURLConnection httpURLConnection = (HttpURLConnection) urlConnection;

// 設定是否從httpUrlConnection讀入，預設情況下是true;
httpURLConnection.setDoInput(true);
// 設定是否向httpUrlConnection輸出
httpURLConnection.setDoOutput(true);
// Post 請求不能使用快取
httpURLConnection.setUseCaches(false);
// 設定請求的方法，預設是GET
httpURLConnection.setRequestMethod("POST");
// 設定字元編碼連線引數
httpURLConnection.setRequestProperty("Connection", "Keep-Alive");
// 設定字元編碼
httpURLConnection.setRequestProperty("Charset", "UTF-8");
// 設定請求內容型別
httpURLConnection.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);

// 設定DataOutputStream
ds = new DataOutputStream(httpURLConnection.getOutputStream());

ds.writeBytes(twoHyphens + boundary+ end);
ds.writeBytes("Content-Disposition: form-data; name=\"accessToken\"");
ds.writeBytes(end);
ds.writeBytes("Content-Length:8");
ds.writeBytes(end);
ds.writeBytes(end);
ds.writeBytes("dengdeng");
ds.writeBytes(end);

StringBuilder sb = new StringBuilder();
for (int i = 0; i < uploadFilePaths.length; i++) {
String uploadFile = uploadFilePaths[i];
String filename = uploadFile.substring(uploadFile.lastIndexOf("//") + 1);
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; " + "name=\"file" + i + "\";filename=\"" + filename + "\"" + end);
ds.writeBytes(end);
FileInputStream fStream = new FileInputStream(uploadFile);
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
while ((length = fStream.read(buffer)) != -1) {
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
/* close streams */
fStream.close();
}
ds.writeBytes(twoHyphens + boundary+twoHyphens+ end);
/* close streams */
ds.flush();
Log.e("----------",twoHyphens + boundary+ end);
if (httpURLConnection.getResponseCode() >= 300) {
throw new Exception(
"HTTP Request is not success, Response code is " + httpURLConnection.getResponseCode()+",message:"+httpURLConnection.getResponseMessage());
}
//Log.e("response code",httpURLConnection.getResponseMessage()+"---"+httpURLConnection.getResponseCode());
if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
inputStream = httpURLConnection.getInputStream();
inputStreamReader = new InputStreamReader(inputStream);
reader = new BufferedReader(inputStreamReader);
tempLine = null;
resultBuffer = new StringBuffer();
while ((tempLine = reader.readLine()) != null) {
resultBuffer.append(tempLine);
resultBuffer.append("\n");
}
}

} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally {
if (ds != null) {
try {
ds.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (inputStreamReader != null) {
try {
inputStreamReader.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

return resultBuffer.toString();
}
}
}

用HttpURLConnection請求之post/get及多檔案上傳寫法

1、post和get請求

2、multipart/form-data型別的form提交

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