Android上传文件到服务器

最新推荐文章于 2025-05-17 16:17:36 发布

PicassoSpring

最新推荐文章于 2025-05-17 16:17:36 发布

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文章标签： android 服务器 string

本文介绍两种在Android应用中实现文件上传的方法。一种方法通过构造multipart/form-data格式的数据包，使用HttpURLConnection进行POST请求来上传文件及表单数据；另一种方法简化了上传过程，直接在请求体中构建文件数据并发送。

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方法1：

public void uploadFile(){

String name=URLEncoder.encode(text1.getText().toString(),"utf-8");
String pass=URLEncoder.encode(text2.getText().toString(),"utf-8");
Map<String, String> params = new HashMap<String, String>();
params.put("NAME", name);
params.put("PASSWORD", pass);

post("http://192.168.1.120/dev/index.php/Device/UploadFile?filename=111&filetype=IMAGE", params, upfiles);
}

Map<String, File> upfiles = new HashMap<String, File>();

void getFile() {
File file = new File("/sdcard/");
File[] files = file.listFiles(new fileFilter());

for (File f: files) {
upfiles.put(f.getName(), new File("/sdcard/"+f.getName()));

}
// Toast.makeText(this, filename, Toast.LENGTH_LONG).show();

}

class fileFilter implements FilenameFilter {
@Override
public boolean accept(File dir, String filename) {
return filename.endsWith(".mp3");
}
}

// 上传代码，第一个参数，为要使用的URL，第二个参数，为表单内容，第三个参数为要上传的文件，可以上传多个文件，这根据需要页定
public static boolean 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);
conn.setDoInput(true);// 允许输入
conn.setDoOutput(true);// 允许输出
conn.setUseCaches(false);
conn.setRequestMethod("POST"); // Post方式
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());
// 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);
sb1.append("Content-Disposition: form-data; name=\"file\"; filename=\""
+ file.getKey() + "\"" + LINEND);
sb1.append("Content-Type: multipart/form-data; 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
boolean success = conn.getResponseCode()==200;
InputStream in = conn.getInputStream();
InputStreamReader isReader = new InputStreamReader(in);
BufferedReader bufReader = new BufferedReader(isReader);
String line = null;
String data = "getResult=";
while ((line = bufReader.readLine()) != null)
data += line;

outStream.close();
conn.disconnect();
return success;

}

方法2：

final String ENCORDING="UTF-8";
public boolean upload(String filepath) throws Exception {
String boundary = "---------------------------7db1c523809b2";//+java.util.UUID.randomUUID().toString();//
// 分割线
File file = new File(filepath);

String fileName=new String("哈哈嗨".getBytes(),"ISO-8859-1");
// 用来解析主机名和端口
URL url = new URL("http://192.168.1.120/dev/index.php/Device/UploadFile?filename="+fileName+"&filetype=IMAGE");
// 用来开启连接
StringBuilder sb = new StringBuilder();
// 用来拼装请求

/*// username字段
sb.append("--" + boundary + "\r\n");
sb.append("Content-Disposition: form-data; name=\"username\"" + "\r\n");
sb.append("\r\n");
sb.append(username + "\r\n");

// password字段
sb.append("--" + boundary + "\r\n");
sb.append("Content-Disposition: form-data; name=\"password\"" + "\r\n");
sb.append("\r\n");
sb.append(password + "\r\n");*/

// 文件部分
sb.append("--" + boundary + "\r\n");
sb.append("Content-Disposition: form-data; name=\"file\"; filename=\"" + filepath + "\"" + "\r\n");
sb.append("Content-Type: application/octet-stream" + "\r\n");
sb.append("\r\n");

// 将开头和结尾部分转为字节数组，因为设置Content-Type时长度是字节长度
byte[] before = sb.toString().getBytes(ENCORDING);
byte[] after = ("\r\n--" + boundary + "--\r\n").getBytes(ENCORDING);

// 打开连接, 设置请求头
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(10000);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
conn.setRequestProperty("Content-Length", before.length + file.length() + after.length + "");

conn.setDoOutput(true);
conn.setDoInput(true);

// 获取输入输出流
OutputStream out = conn.getOutputStream();
FileInputStream fis = new FileInputStream(file);
// 将开头部分写出
out.write(before);

// 写出文件数据
byte[] buf = new byte[1024*5];
int len;
while ((len = fis.read(buf)) != -1)
out.write(buf, 0, len);

// 将结尾部分写出
out.write(after);

InputStream in = conn.getInputStream();
InputStreamReader isReader = new InputStreamReader(in);
BufferedReader bufReader = new BufferedReader(isReader);
String line = null;
String data = "getResult=";
while ((line = bufReader.readLine()) != null)
data += line;
Log.e("fromServer", "result="+data);
boolean sucess=conn.getResponseCode() == 200;
in.close();
fis.close();
out.close();
conn.disconnect();

return sucess;
}