HttpClient httpClient = HttpClients.createDefault();
HttpPost httppost = new HttpPost(url);
MultipartEntityBuilder mEntityBuilder = MultipartEntityBuilder.create();
//byte[] postBody
mEntityBuilder.addBinaryBody(postName, postBody);
//提交文件
//File file = new File("test");
//mEntityBuilder.addBinaryBody("name", file);
mEntityBuilder.addTextBody("name", "Value");
httppost.setEntity(mEntityBuilder.build());
HttpResponse responce = httpClient.execute(httppost);
不写成接口：可以直接写在一起
HttpEntity reqEntity = MultipartEntityBuilder.create()
.setMode(HttpMultipartMode.BROWSER_COMPATIBLE)
.addPart("multipartFile", bin)
.addPart("userId", userId).setCharset(CharsetUtils.get("UTF-8")).build();
不带参数时：可以直接定义指定的entity
File file = new File("somefile.txt");
FileEntity reqEntity = new FileEntity(file, ContentType.create("text/plain", "UTF-8"));
byte[] b;
ByteArrayEntity entity = new ByteArrayEntity(b) ;下面是我自己定义的接口：
/**
* Http request ：Post
*
* @param url
* @param postBody(Byte)
* @param postName
* @param params
* @param heads
* @param timeOut(Millisecond)
* @return String of request result
*/
public static String postFile(String url, byte[] postBody, String postName, Map params,
Map heads, Integer timeOut) throws HttpErrorException {
String reStr = "";
try {
HttpClient httpClient = HttpClients.createDefault();
HttpPost httppost = new HttpPost(url); MultipartEntityBuilder mEntityBuilder = MultipartEntityBuilder.create();
mEntityBuilder.addBinaryBody(postName, postBody); if (params != null) {
// text params
for (Entry e : params.entrySet()) {
mEntityBuilder.addTextBody(e.getKey(), e.getValue());
}
} httppost.setEntity(mEntityBuilder.build());
if (heads != null) {
// 一般要求プロパティを設定します
for (Entry e : heads.entrySet()) {
httppost.addHeader(e.getKey(), e.getValue());
}
} // set Timeout
RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(timeOut)
.setConnectTimeout(timeOut).setSocketTimeout(timeOut).build();
httppost.setConfig(requestConfig);
// get responce
HttpResponse responce = httpClient.execute(httppost);
// get http status code
int resStatu = responce.getStatusLine().getStatusCode(); if (resStatu == HttpStatus.SC_OK) {
// get result data
HttpEntity entity = responce.getEntity();
reStr = EntityUtils.toString(entity);
}
else {
log.error(url + ": resStatu is " + resStatu);
throw new HttpErrorException(url, "resStatu is" + resStatu);
}
}
catch (ConnectionPoolTimeoutException e) {
log.error("http post throw ConnectionPoolTimeoutException", e);
throw new HttpErrorException(url, " throw timeout");
}
catch (ConnectTimeoutException e) {
log.error("http post throw ConnectTimeoutException", e);
throw new HttpErrorException(url, " throw timeout");
}
catch (SocketTimeoutException e) {
log.error("http post throw SocketTimeoutException", e);
throw new HttpErrorException(url, " throw timeout");
}
catch (HttpErrorException e) {
throw e;
}
catch (Exception e) {
log.error("http post throw Exception", e);
throw new HttpErrorException(url, " throw Exception");
}
return reStr;
}