我在谷歌搜索了许多关于向服务器发布数据的多部分技术的博客，每个人都在做与我正在做的相同的方式，但我仍然无法将我的参数发布到服务器以及图像这里是我的代码：
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
byte[] imageByte = null;
ByteArrayBody bab = null;
if(order.getSignature() != null)
{
imageByte = order.getSignature();
httppost.setHeader("Content-Type", "image/png");
bab = new ByteArrayBody(imageByte, "signature.png");
}
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
Charset chars = Charset.forName("UTF-8");
builder.setCharset(chars);
builder.addTextBody("SessId",sessionid);
builder.addTextBody("Status",order.getDeliveryStatus());
builder.addTextBody("Notes",order.getNotes());
builder.addTextBody("OrderId",order.getId());
if(order.getConfirm_delivery_datetime() != null)
builder.addTextBody("ConfirmDeliveryDate",order.getConfirm_delivery_datetime());
if(bab != null)
builder.addPart("Signature", bab);
final HttpEntity yourEntity = builder.build();
httppost.setEntity(yourEntity);
HttpResponse response = httpclient.execute(httppost);
if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
s = new StringBuilder();
s.append("Error:" + response.getStatusLine().getStatusCode());
}else {
// i get success but no data transfers on server.
}
是的，当我使用NameValuePair技术时，我确实收到了服务器上的所有参数，任何人都指导我在上面的代码中做了什么错误？
ArrayList<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
nameValuePair.add(new BasicNameValuePair("SessId",sessionid));
nameValuePair.add(new BasicNameValuePair("Status",order.getDeliveryStatus()));
nameValuePair.add(new BasicNameValuePair("Notes",order.getNotes()));
nameValuePair.add(new BasicNameValuePair("OrderId",order.getId()));
nameValuePair.add(new BasicNameValuePair("ConfirmDeliveryDate",order.getConfirm_delivery_datetime()));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePair));
任何帮助将不胜感激。
答案 0 :(得分：1)
我花了两天时间讨论这个问题但我无法使用我的项目中包含的apache .jar文件通过multipart发布数据，因为该技术已在上述问题中发布。
然后我不得不改变以纯java方式发布的方式，并在下面给出了work.code：
自定义类使用率：
try {
MultipartUtil multipart = new MultipartUtil(requestURL, charset);
multipart.addHeaderField("User-Agent", "CodeJava");
multipart.addFormField("SessId", sessionid);
multipart.addFormField("Status", order.getDeliveryStatus());
multipart.addFormField("Notes",order.getNotes());
multipart.addFormField("OrderId", order.getId());
if(order.getConfirm_delivery_datetime() != null)
multipart.addFormField("ConfirmDeliveryDate", order.getConfirm_delivery_datetime());
if(order.getSignature() != null)
multipart.addPart("Signature", order.getSignature(),"Signature"+order.getId()+".png");
List<String> response = multipart.finish();
System.out.println("SERVER REPLIED:");
for (String line : response) {
System.out.println(line);
}
} catch (IOException ex) {
System.err.println(ex);
}
自定义类：
package com.utils;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import android.os.Build;
/**
* This utility class provides an abstraction layer for sending multipart HTTP
* POST requests to a web server.
* @author www.codejava.net
*
*/
public class MultipartUtil {
private final String boundary;
private static final String LINE_FEED = "\r\n";
private HttpURLConnection httpConn;
private String charset;
private OutputStream outputStream;
private PrintWriter writer;
/**
* This constructor initializes a new HTTP POST request with content type
* is set to multipart/form-data
* @param requestURL
* @param charset
* @throws IOException
*/
public MultipartUtil(String requestURL, String charset)
throws IOException {
this.charset = charset;
// creates a unique boundary based on time stamp
boundary = "===" + System.currentTimeMillis() + "===";
URL url = new URL(requestURL);
httpConn = (HttpURLConnection) url.openConnection();
httpConn.setUseCaches(false);
httpConn.setDoOutput(true); // indicates POST method
httpConn.setDoInput(true);
httpConn.setRequestProperty("Content-Type",
"multipart/form-data; boundary=" + boundary);
httpConn.setRequestProperty("User-Agent", "CodeJava Agent");
httpConn.setRequestProperty("Test", "Bonjour");
outputStream = httpConn.getOutputStream();
writer = new PrintWriter(new OutputStreamWriter(outputStream, charset),
true);
}
/**
* Adds a form field to the request
* @param name field name
* @param value field value
*/
public void addFormField(String name, String value) {
writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name=\"" + name + "\"")
.append(LINE_FEED);
writer.append("Content-Type: text/plain; charset=" + charset).append(
LINE_FEED);
writer.append(LINE_FEED);
writer.append(value).append(LINE_FEED);
writer.flush();
}
/**
* Adds a upload file section to the request
* @param fieldName name attribute in <input type="file" name="..." />
* @param uploadFile a File to be uploaded
* @throws IOException
*/
public void addFilePart(String fieldName, File uploadFile)
throws IOException {
String fileName = uploadFile.getName();
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
FileInputStream inputStream = new FileInputStream(uploadFile);
byte[] buffer = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.flush();
inputStream.close();
writer.append(LINE_FEED);
writer.flush();
}
public void addPart(String fieldName, byte[] uploadFile,String filename)
throws IOException {
String fileName = filename;
writer.append("--" + boundary).append(LINE_FEED);
writer.append(
"Content-Disposition: form-data; name=\"" + fieldName
+ "\"; filename=\"" + fileName + "\"")
.append(LINE_FEED);
writer.append(
"Content-Type: "
+ URLConnection.guessContentTypeFromName(fileName))
.append(LINE_FEED);
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();
ByteArrayOutputStream baos = new ByteArrayOutputStream(uploadFile.length);
baos.write(uploadFile, 0, uploadFile.length);
InputStream inputStream = new ByteArrayInputStream(baos.toByteArray());
//InputStream inputStream = new Byte(uploadFile);
byte[] buffer = new byte[4096];
int bytesRead = -1;
while ((bytesRead = inputStream.read(buffer)) != -1) {
outputStream.write(buffer, 0, bytesRead);
}
outputStream.flush();
inputStream.close();
writer.append(LINE_FEED);
writer.flush();
}
/**
* Adds a header field to the request.
* @param name - name of the header field
* @param value - value of the header field
*/
public void addHeaderField(String name, String value) {
writer.append(name + ": " + value).append(LINE_FEED);
writer.flush();
}
/**
* Completes the request and receives response from the server.
* @return a list of Strings as response in case the server returned
* status OK, otherwise an exception is thrown.
* @throws IOException
*/
public List<String> finish() throws IOException {
List<String> response = new ArrayList<String>();
writer.append(LINE_FEED).flush();
writer.append("--" + boundary + "--").append(LINE_FEED);
writer.close();
// checks server's status code first
int status = httpConn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
BufferedReader reader = new BufferedReader(new InputStreamReader(
httpConn.getInputStream()));
String line = null;
while ((line = reader.readLine()) != null) {
response.add(line);
}
reader.close();
httpConn.disconnect();
} else {
if (Build.VERSION.SDK_INT > 13) { httpConn.setRequestProperty("Connection", "close"); }
throw new IOException("Server returned non-OK status: " + status);
}
return response;
}
}
答案 1 :(得分：-1)
我使用apache http库发送带有post的图像的解决方案：
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, baos);
byte[] imageBytes = baos.toByteArray();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(StaticData.AMBAJE_SERVER_URL + StaticData.AMBAJE_ADD_AMBAJ_TO_GROUP);
String boundary = "-------------" + System.currentTimeMillis();
httpPost.setHeader("Content-type", "multipart/form-data; boundary="+boundary);
ByteArrayBody bab = new ByteArrayBody(imageBytes, "pic.png");
StringBody sbOwner = new StringBody(StaticData.loggedUserId, ContentType.TEXT_PLAIN);
StringBody sbGroup = new StringBody("group", ContentType.TEXT_PLAIN);
HttpEntity entity = MultipartEntityBuilder.create()
.setMode(HttpMultipartMode.BROWSER_COMPATIBLE)
.setBoundary(boundary)
.addPart("group", sbGroup)
.addPart("owner", sbOwner)
.addPart("image", bab)
.build();
httpPost.setEntity(entity);
try {
HttpResponse response = httpclient.execute(httpPost);
...then reading response