本类可以实现在安卓开发中在一个表单中同时提交参数、数据和上传多个文件，并可以自行制定字段名称。直接上代码：
package com.example.myuploadtest.utils;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.UUID;
import com.example.myuploadtest.Log;//这行可以删了替换为系统自带的
public class HttpConnectionUtil {
private static final String TAG = HttpConnectionUtil.class.getSimpleName();
private static final int TIME_OUT = 10*10000000; //超时时间
private static final String CHARSET = "utf-8"; //设置编码
private static final String PREFIX = "--"; //前缀
private static final String LINE_END = "\r\n"; //换行
private static final String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成
private static final String CONTENT_TYPE = "multipart/form-data"; //内容类型
public static void postRequest(String strUrl, Map<String, String> strParams, Map<String, File> fileParams, FileUploadListener listener){
String strResult = null;
HttpURLConnection conn = null;
try {
URL url = new URL(strUrl);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST"); //请求方式
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); //Post 请求不能使用缓存
//设置请求头参数
conn.setRequestProperty("Charset", CHARSET);//设置编码
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
//请求体
//提交参数
DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
dos.writeBytes( getStrParams(strParams).toString() );
dos.flush();
//当文件不为空，把文件包装并且上传
if(fileParams.size() > 0) {
//文件上传
postFileParams(dos, fileParams, listener);
}
//请求结束标志
dos.writeBytes(PREFIX + BOUNDARY + PREFIX + LINE_END);
dos.flush();
dos.close();
Log.i(TAG, "postResponseCode() = "+conn.getResponseCode() );
//获取服务器响应码 200=成功, 当服务器响应成功，获取服务器响应的流
if (conn.getResponseCode() == 200) {
InputStream in = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String line = null;
StringBuilder response = new StringBuilder();
while ((line = reader.readLine()) != null) {
response.append(line);
}
Log.i(TAG, "run: " + response);
strResult = response.toString();
}
else{
Log.i(TAG, "postResponseCode() = "+conn.getResponseCode() );
strResult = null;
}
listener.onFinish(conn.getResponseCode(), strResult, conn.getHeaderFields());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}finally {
if (conn!=null){
conn.disconnect();
}
}
//return strResult;
}
public interface FileUploadListener{
public void onProgress(long pro, double precent);
public void onFinish(int code, String res, Map<String, List<String>> headers);
}
/**
* 对post参数进行拼接编码处理，返回拼接后的结果
*/
private static StringBuilder getStrParams(Map<String,String> strParams){
StringBuilder strSb = new StringBuilder();
for (Map.Entry<String, String> entry : strParams.entrySet() ){
strSb.append(PREFIX)
.append(BOUNDARY)
.append(LINE_END)
.append("Content-Disposition: form-data; name=\"" + entry.getKey() + "\"" + LINE_END)
.append("Content-Type: text/plain; charset=" + CHARSET + LINE_END)
.append("Content-Transfer-Encoding: 8bit" + LINE_END)
.append(LINE_END)// 参数头设置完以后需要两个换行，然后才是参数内容
.append(entry.getValue())
.append(LINE_END);
}
return strSb;
}
/**
* 对post文件进行拼接编码处理，直接上传
*/
private static void postFileParams(DataOutputStream dos, Map<String, File> fileParams, FileUploadListener listener){
StringBuilder fileSb = new StringBuilder();
for (Map.Entry<String, File> fileEntry: fileParams.entrySet()){
//写入文件参数
fileSb.append(PREFIX)
.append(BOUNDARY)
.append(LINE_END)
/**
* 这里重点注意： name里面的值为服务端需要的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
*/
.append("Content-Disposition: form-data; name=\""+ fileEntry.getKey() + "\"; filename=\"" + fileEntry.getValue().getName() + "\"" + LINE_END)
.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END) //此处的ContentType不同于 请求头 中Content-Type
.append("Content-Transfer-Encoding: 8bit" + LINE_END)
.append(LINE_END);// 参数头设置完以后需要两个换行，然后才是参数内容
//写入文件数据
try {
dos.writeBytes(fileSb.toString());
dos.flush();
InputStream is = new FileInputStream(fileEntry.getValue());
byte[] buffer = new byte[1024];
long totalbytes = fileEntry.getValue().length();
long curbytes = 0;
Log.i("cky","total="+totalbytes);
int len = 0;
while ((len = is.read(buffer)) != -1){
dos.write(buffer,0,len);
curbytes += len;
listener.onProgress(curbytes, 1.0d*curbytes/totalbytes);
}
is.close();
dos.writeBytes(LINE_END);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
使用方式如下：
final String strUrl = "http://127.0.0.1/post/";
final HashMap<String,String> strParams = new HashMap<String,String>();
strParams.put("action", "uploadByAJAX");
strParams.put("imei", "A00123");
final HashMap<String,File> fileParams = new HashMap<String,File>();
fileParams.put("file", new File(picturePath));
//fileParams.put("file", new File(selectedImage.toString()));
new Thread(){
@Override
public void run() {
HttpConnectionUtil.postRequest(strUrl, strParams, fileParams, new FileUploadListener() {
@Override
public void onProgress(long pro, double precent) {
Log.i("cky", precent+"");
}
@Override
public void onFinish(int code, String res, Map<String, List<String>> headers) {
Log.i("cky", res);
}
});
}
}.start();
主要参考了如下链接：
https://blog.csdn.net/crazy__chen/article/details/47703781