HttpURLConnection Post請求上傳檔案和引數到servlet
阿新 • • 發佈：2019-02-02
public String uplaod(String actionUrl, Map<String, String> params) {
InputStream in = null;
String BOUNDARY = java.util.UUID.randomUUID().toString();
String PREFFIX = "--", LINEND = "\r\n";
String MULTIPART_FROM_DATA = "multipart/form-data";
String CHARSET = "UTF-8";
URL uri;
StringBuilder sb2 = null;
String filePath = params.get("FILE_PATH");
try {
uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();// 設定從主機讀取資料超時
conn.setReadTimeout(10 * 1000);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Charset", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);
// 首先組拼文字型別的引數
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : params.entrySet()) {
sb.append(PREFFIX);
sb.append(BOUNDARY);
sb.append(LINEND);
sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
sb.append(LINEND);
sb.append(entry.getValue());
sb.append(LINEND);
}
DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(sb.toString().getBytes(CHARSET));
// 構建傳送字串資料
if (!ApplicationUtil.isEmptyString(filePath)) {
String fileName = params.get("FILE_NAME");
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + fileName + "\"" + LINEND);
sb1.append("Content-Type: application/octet-stream;chartset=" + CHARSET + LINEND);
sb1.append(LINEND);
// 寫入到輸出流中
outStream.write(sb1.toString().getBytes());
// 將檔案讀入輸入流中
InputStream is = new FileInputStream(filePath);
byte[] buffer = new byte[1024];
int len = 0;
// 寫入輸出流
while ((len = is.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
is.close(); // 新增換行標誌
outStream.write(LINEND.getBytes());
} // 請求結束標誌
byte[] end_data = (PREFFIX + BOUNDARY + PREFFIX + LINEND).getBytes();
outStream.write(end_data); // 刷新發送資料
outStream.flush(); // 得到響應碼
int res = conn.getResponseCode();
// 上傳成功返回200
if (res == 200) {
in = conn.getInputStream();
int ch;
sb2 = new StringBuilder(); // 儲存資料
while ((ch = in.read()) != -1) {
sb2.append((char) ch);
}
}
conn.disconnect();
}
catch (MalformedURLException e) {
e.printStackTrace();
}
catch (ProtocolException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return sb2 == null ? null : sb2.toString();
}
InputStream in = null;
String BOUNDARY = java.util.UUID.randomUUID().toString();
String PREFFIX = "--", LINEND = "\r\n";
String MULTIPART_FROM_DATA = "multipart/form-data";
String CHARSET = "UTF-8";
URL uri;
StringBuilder sb2 = null;
String filePath = params.get("FILE_PATH");
try {
uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();// 設定從主機讀取資料超時
conn.setReadTimeout(10 * 1000);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setUseCaches(false);
conn.setRequestMethod("POST");
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Charset", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);
// 首先組拼文字型別的引數
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : params.entrySet()) {
sb.append(PREFFIX);
sb.append(BOUNDARY);
sb.append(LINEND);
sb.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINEND);
sb.append("Content-Type: text/plain; charset=" + CHARSET + LINEND);
sb.append("Content-Transfer-Encoding: 8bit" + LINEND);
sb.append(LINEND);
sb.append(entry.getValue());
sb.append(LINEND);
}
DataOutputStream outStream = new DataOutputStream(conn.getOutputStream());
outStream.write(sb.toString().getBytes(CHARSET));
// 構建傳送字串資料
if (!ApplicationUtil.isEmptyString(filePath)) {
String fileName = params.get("FILE_NAME");
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + fileName + "\"" + LINEND);
sb1.append("Content-Type: application/octet-stream;chartset=" + CHARSET + LINEND);
sb1.append(LINEND);
// 寫入到輸出流中
outStream.write(sb1.toString().getBytes());
// 將檔案讀入輸入流中
InputStream is = new FileInputStream(filePath);
byte[] buffer = new byte[1024];
int len = 0;
// 寫入輸出流
while ((len = is.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
is.close(); // 新增換行標誌
outStream.write(LINEND.getBytes());
} // 請求結束標誌
byte[] end_data = (PREFFIX + BOUNDARY + PREFFIX + LINEND).getBytes();
outStream.write(end_data); // 刷新發送資料
outStream.flush(); // 得到響應碼
int res = conn.getResponseCode();
// 上傳成功返回200
if (res == 200) {
in = conn.getInputStream();
int ch;
sb2 = new StringBuilder(); // 儲存資料
while ((ch = in.read()) != -1) {
sb2.append((char) ch);
}
}
conn.disconnect();
}
catch (MalformedURLException e) {
e.printStackTrace();
}
catch (ProtocolException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
return sb2 == null ? null : sb2.toString();
}