Httppost上传
2023-09-14 09:00:57 时间
public static Boolean postSDFile(String urlstr, String msg, String filePath
) {
final String TAG = "uploadFile";
final int TIME_OUT = 10 * 1000; // 超时时间
final String CHARSET = "utf-8"; // 设置编码
//String result = null;
String BOUNDARY = Base64.encode(msg);// UUID.randomUUID().toString(); //边界标识
// 随机生成
String PREFIX = "--", LINE_END = "\r\n";
String CONTENT_TYPE = "multipart/form-data"; // 内容类型
int res = 0;
URL url;
InputStream is=null;
try {
url = new URL(urlstr);
HttpURLConnection conn = (HttpURLConnection) url
.openConnection();
conn.setReadTimeout(TIME_OUT);
conn.setConnectTimeout(TIME_OUT);
conn.setDoInput(true); // 允许输入流
conn.setDoOutput(true); // 允许输出流
conn.setUseCaches(false); // 不允许使用缓存
conn.setRequestMethod("POST"); // 请求方式
conn.setRequestProperty("Charset", CHARSET); // 设置编码
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Content-Type", CONTENT_TYPE
+ ";boundary=" + BOUNDARY);
File f = new File(filePath);
if(!f.exists()){
String write_str ="此文件已被删除";
try{
FileOutputStream fout = new FileOutputStream(f);
byte [] bytes = write_str.getBytes();
fout.write(bytes);
fout.close();
}
catch(Exception e){
e.printStackTrace();
}
is = new FileInputStream(f);
//is = context.openFileInput(filePath);// 打开文件流
if (is != null) {
* 当文件不为空,把文件包装并且上传
DataOutputStream dos = new DataOutputStream(
conn.getOutputStream());
StringBuffer sb = new StringBuffer();
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINE_END);
* 这里重点注意: name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
* filename是文件的名字,包含后缀名的 比如:abc.png
sb.append("Content-Disposition: form-data; name=\"uploadedfile\"; filename=\""
+ Base64.encode(filePath) + "\"" + LINE_END);
sb.append("Content-Type: application/octet-stream; charset="
+ CHARSET + LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());
byte[] bytes = new byte[1024];
int len = 0;
while ((len = is.read(bytes)) != -1) {
dos.write(bytes, 0, len);
System.out.println("aaaa"+len);
is.close();
dos.write(LINE_END.getBytes());
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINE_END)
.getBytes();
dos.write(end_data);
dos.flush();
* 获取响应码 200=成功 当响应成功,获取响应的流
res = conn.getResponseCode();
Log.e(TAG, "response code:" + res);
Log.e(TAG, "request success");
InputStream input = conn.getInputStream();
StringBuffer sb1 = new StringBuffer();
int ss;
while ((ss = input.read()) != -1) {
sb1.append((char) ss);
//result = sb1.toString();
//Log.e(TAG, "result : " + result);
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
if(res == 200){
return true;}
else{return false;}
public static String PostMsg(String pathUrl, String msg) {
StringBuffer sb = null;
sb = new StringBuffer();
try {
// 建立连接
URL url = new URL(pathUrl);
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection();
//设置连接属性
httpConn.setDoOutput(true);// 使用 URL 连接进行输出
httpConn.setDoInput(true);// 使用 URL 连接进行输入
httpConn.setUseCaches(false);// 忽略缓存
httpConn.setRequestMethod("POST");// 设置URL请求方法
String requestString = Base64.encode(msg);
// 设置请求属性
// 获得数据字节数据,请求数据流的编码,必须和下面服务器端处理请求流的编码一致
byte[] requestStringBytes = requestString.getBytes();
httpConn.setRequestProperty("Content-length", "" + requestStringBytes.length);
httpConn.setRequestProperty("Content-Type", "application/octet-stream");
httpConn.setRequestProperty("Connection", "Keep-Alive");// 维持长连接
httpConn.setRequestProperty("Charset", "UTF-8");
// 建立输出流,并写入数据
OutputStream outputStream = httpConn.getOutputStream();
outputStream.write(requestStringBytes);
outputStream.close();
//System.out.println("1");
// 获得响应状态
int responseCode = httpConn.getResponseCode();
if (HttpURLConnection.HTTP_OK == responseCode) {// 连接成功
// 当正确响应时处理数据
String readLine;
BufferedReader responseReader;
// 处理响应流,必须与服务器响应流输出的编码一致
responseReader = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
while ((readLine = responseReader.readLine()) != null) {
sb.append(readLine).append("\n");
}
responseReader.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
return sb.toString();
}
发送post请求下载文件 先说一下背景:这是一个以vue作为框架并用Axios来发送http请求的项目。我想要实现用axios来发送post请求,然后服务器会返回的response是一个文件流,我希望能将这个文件流写入excel,从而实现该excel文件的下载。
httpclient get/post请求 public static String httpPost(String url, JSONObject json) { String respContent = null; try{ HttpPost httpPost = new HttpPost(url); CloseableHttpClient client = HttpClients.
发送post请求下载文件 先说一下背景:这是一个以vue作为框架并用Axios来发送http请求的项目。我想要实现用axios来发送post请求,然后服务器会返回的response是一个文件流,我希望能将这个文件流写入excel,从而实现该excel文件的下载。
httpclient get/post请求 public static String httpPost(String url, JSONObject json) { String respContent = null; try{ HttpPost httpPost = new HttpPost(url); CloseableHttpClient client = HttpClients.