Question

httpclient如何一起上传内容和图片

hi，大家好，我现在客户端发送数据到服务器端没有问题，不知道和图片一起该如何上传呢，我现在使用的是HttpPost httpPost = new HttpPost(url); List params = new ArrayList (); params.add(new BasicNameValuePair("value1", 1)); params.add(new BasicNameValuePair("value2", 2)); params.add(new BasicNameValuePair("value2", 3)); httpPost.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));请问加入图片后该如何加入进去呢，期待高手解答，在网上搜了一下，大部分都是使用HttpURLConnection，有没有用httpclient实现图片和内容一起上传的？

Answer 1

以文件的形式传参
/**
* 通过拼接的方式构胡知造请求内容，实现参数传输以及文裤皮消件传输
*
* @param actionUrl 访问的服务器URL
* @param params 普通参数
* @param files 文件参数
* @return
* @throws IOException
*/
public static void post(String actionUrl, Map<String, String> params, Map<String, File> files) throws IOException
{

String BOUNDARY = java.util.UUID.randomUUID().toString();
String PREFIX = "--", LINEND = "\r\n";
String MULTIPART_FROM_DATA = "multipart/form-data";
String CHARSET = "UTF-8";

URL uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
conn.setReadTimeout(5 * 1000); // 缓存的最长时间
conn.setDoInput(true);// 允许输入
conn.setDoOutput(true);// 允许输出
conn.setUseCaches(false); // 不允许使用缓存握悄
conn.setRequestMethod("POST");
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Charsert", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

// 首先组拼文本类型的参数
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : params.entrySet())
{
sb.append(PREFIX);
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());
InputStream in = null;
// 发送文件数据
if (files != null)
{
for (Map.Entry<String, File> file : files.entrySet())
{
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
// name是post中传参的键 filename是文件的名称
sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + file.getKey() + "\"" + LINEND);
sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());

InputStream is = new FileInputStream(file.getValue());
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1)
{
outStream.write(buffer, 0, len);
}

is.close();
outStream.write(LINEND.getBytes());
}

// 请求结束标志
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
outStream.write(end_data);
outStream.flush();
// 得到响应码
int res = conn.getResponseCode();
if (res == 200)
{
in = conn.getInputStream();
int ch;
StringBuilder sb2 = new StringBuilder();
while ((ch = in.read()) != -1)
{
sb2.append((char) ch);
}
}
outStream.close();
conn.disconnect();
}
// return in.toString();
}

以数据流的形式传参
public static String postFile(String actionUrl, Map<String, String> params, Map<String, byte[]> files)
throws Exception
{
StringBuilder sb2 = null;
String BOUNDARY = java.util.UUID.randomUUID().toString();
String PREFIX = "--", LINEND = "\r\n";
String MULTIPART_FROM_DATA = "multipart/form-data";
String CHARSET = "UTF-8";

URL uri = new URL(actionUrl);
HttpURLConnection conn = (HttpURLConnection) uri.openConnection();
conn.setReadTimeout(6 * 1000); // 缓存的最长时间
conn.setDoInput(true);// 允许输入
conn.setDoOutput(true);// 允许输出
conn.setUseCaches(false); // 不允许使用缓存
conn.setRequestMethod("POST");
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Charsert", "UTF-8");
conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA + ";boundary=" + BOUNDARY);

// 首先组拼文本类型的参数
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, String> entry : params.entrySet())
{
sb.append(PREFIX);
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());
InputStream in = null;
// 发送文件数据
if (files != null)
{
for (Map.Entry<String, byte[]> file : files.entrySet())
{
StringBuilder sb1 = new StringBuilder();
sb1.append(PREFIX);
sb1.append(BOUNDARY);
sb1.append(LINEND);
sb1.append("Content-Disposition: form-data; name=\"pic\"; filename=\"" + file.getKey() + "\"" + LINEND);
sb1.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINEND);
sb1.append(LINEND);
outStream.write(sb1.toString().getBytes());

// InputStream is = new FileInputStream(file.getValue());
// byte[] buffer = new byte[1024];
// int len = 0;
// while ((len = is.read(buffer)) != -1)
// {
// outStream.write(buffer, 0, len);
// }
// is.close();
outStream.write(file.getValue());

outStream.write(LINEND.getBytes());
}

// 请求结束标志
byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes();
outStream.write(end_data);
outStream.flush();
// 得到响应码
int res = conn.getResponseCode();
if (res == 200)
{
in = conn.getInputStream();
int ch;
sb2 = new StringBuilder();
while ((ch = in.read()) != -1)
{
sb2.append((char) ch);
}
System.out.println(sb2.toString());
}
outStream.close();
conn.disconnect();
// 解析服务器返回来的数据
return ParseJson.getEditMadIconResult(sb2.toString());
}
else
{
return "Update icon Fail";
}
// return in.toString();
}

Answer 2

用httpclient 服务端告做代码怎么写啊，客户端 直接 MultipartEntity reqEntity = new MultipartEntity(); if (!imageurl.equals("")) { FileBody file = new FileBody(new File(imageurl)); reqEntity.addPart("pic", file); }不用写流操作吗液唯？ 查看原帖>袜埋衡>

Answer 3

请教楼主一个问题，我上传文件的时候中文文件会出现乱码，怎么解决啊？？？

Answer 4

呵呵,楼上的用HttpClient上传解决塌困了啊，帮帮小弟我咯，我轮歼正困惑着，看到回复了，吱一声 查团桐念看原帖>>

Answer 5

请教楼主一个问题，我上传文件的时候中文文件会出现乱码，怎么解决啊？？？ 查看原帖>>