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Android上传图片(Android Studio)
Fragment界面：
private String img_src;
/**
* 从相册选取图片
*/
public void selectImg() {
Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
startActivityForResult(intent, SELECT_PHOTO);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case SELECT_PHOTO:
switch (resultCode) {
case RESULT_OK:
Uri uri = data.getData();
img_src = uri.getPath();//这是本机的图片路径
ContentResolver cr = getActivity().getContentResolver();
try {
Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
/* 将Bitmap设定到ImageView */
imageView.setImageBitmap(bitmap);
String[] proj = {MediaStore.Images.Media.DATA};
CursorLoader loader = new CursorLoader(getContext(), uri, proj, null, null, null);
Cursor cursor = loader.loadInBackground();
if (cursor != null) {
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
img_src = cursor.getString(column_index);//图片实际路径
}
cursor.close();
} catch (FileNotFoundException e) {
Log.e("Exception", e.getMessage(), e);
}
break;
}
break;
}
}
public void uploadImage(String path) {
new Thread(new Runnable() {
@Override
public void run() {
String uploadurl = SharedPreferencesUtil.getServerUrls(getActivity()) + "mobileqrcode/uploadsignimg.html";
try {
File file = new File(img_src);
result = UploadUtil.uploadImage(file, uploadurl);
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}上传文件工具类：
public class UploadUtil {
private static final String TAG = "uploadFile";
private static final int TIME_OUT = 10 * 1000;//超时时间
private static final String CHARSET = "utf-8";//设置编码
/**
* android上传文件到服务器
*
* @param file 需要上传的文件
* @param RequestURL 请求的url
* @return 返回响应的内容
*/
public static String uploadImage(File file, String RequestURL) {
String result = "error";
String BOUNDARY = 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
try {
URL url = new URL(RequestURL);
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);
conn.connect();
if (file != null) {
//当文件不为空，把文件包装并且上传
DataOutputStream dos = new DataOutputStream(conn.getOutputStream());
/*StringBuilder sb = new StringBuilder();
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=\"inputName\"; filename=\"" + file.getName() + "\"" + LINE_END);
//sb.append("Content-Type: application/octet-stream; charset=" + CHARSET + LINE_END);
//sb.append("Content-Type: " + getMIMEType(file) + LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());*///此写法会导致无法上传
dos.writeBytes(PREFIX + BOUNDARY + LINE_END);
dos.writeBytes("Content-Disposition: form-data; " + "name=\"inputName\";filename=\"" + file.getName() + "\"" + LINE_END);
dos.writeBytes(LINE_END);
FileInputStream is = new FileInputStream(file);
byte[] bytes = new byte[1024];
int len = -1;
while ((len = is.read(bytes)) != -1) {
dos.write(bytes, 0, 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
*/
int res = conn.getResponseCode();
if (res == 200) {
InputStream input = conn.getInputStream();
StringBuilder sbs = new StringBuilder();
int ss;
while ((ss = input.read()) != -1) {
sbs.append((char) ss);
}
result = sbs.toString();
Log.i(TAG, "result------------------>>" + result);
}
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
private static String getMIMEType(File file) {
String fileName = file.getName();
if (fileName.endsWith("png") || fileName.endsWith("PNG")) {
return "image/png";
} else {
return "image/jpg";
}
}
}
Java端接收图片(Eclipse)
@RequestMapping(value = "/uploadsignimg", method = RequestMethod.POST)
public void uploadOrderSignImage(HttpServletRequest request, HttpSession session, HttpServletResponse response) {
try {
MultipartHttpServletRequest rq = (MultipartHttpServletRequest) request;
Map<String, MultipartFile> file_list = rq.getFileMap();
if (file_list != null && file_list.size() > 0) {
if (file_list.containsKey("inputName")) {
MultipartFile file = file_list.get("inputName");
if (file != null) {
// 保存订单签收图片
String fileName = file.getOriginalFilename();
String newFileName = "";
String[] desp = fileName.split("\\.");
if (desp != null && desp.length > 0) {
String extendName = desp[desp.length - 1];
newFileName = new Date().getTime() + "." + extendName;
ServletContext servletContext = request.getSession().getServletContext();
String uploadPath = servletContext.getRealPath("/") + "upload\\";
File saveFile = new File(uploadPath, newFileName);
file.transferTo(saveFile);
}
session.setAttribute("newfilename", newFileName);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}