android文件上传到服务器

package uploadDemo;

import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.UUID;

import android.util.Log;

/**
*
* 上传工具类
* @author spring sky
*/
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rul
* @return 返回响应的内容
*/
public String uploadFile(File file,String RequestURL)
{
String result = null;
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);

if(file!=null)
{
/**
* 当文件不为空，把文件包装并且上传
*/
DataOutputStream dos = new DataOutputStream( conn.getOutputStream());
StringBuffer sb = new StringBuffer();
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=\"img\"; filename=\""+file.getName()+"\""+LINE_END);
sb.append("Content-Type: application/octet-stream; charset="+CHARSET+LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());
InputStream is = new FileInputStream(file);
byte[] bytes = new byte[1024];
int len = 0;
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();
Log.e(TAG, "response code:"+res);
// if(res==200)
// {
Log.e(TAG, "request success");
InputStream input = conn.getInputStream();
StringBuffer sb1= new StringBuffer();
int ss ;
while((ss=input.read())!=-1)
{
sb1.append((char)ss);
}
result = sb1.toString();
Log.e(TAG, "result : "+ result);
// }
// else{
// Log.e(TAG, "request error");
// }
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
}

package ting.app.openwindow;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class FileUploadActivity extends Activity implements OnClickListener {

protected static final int SUCCESS = 2;
protected static final int FAILD = 3;
protected static int RESULT_LOAD_FILE = 1;
private TextView cancel;
private TextView upload;
private EditText pathView;
private Button buttonLoadImage;
private String requestURL = "http://192.168.191.1:8080/UpFile1/UploadServlet";
private String picturePath;
private View show;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_file_upload);
initView();
initData();
}

private Handler mHandler = new Handler(new Handler.Callback() {

@Override
public boolean handleMessage(Message msg) {
switch (msg.what) {

case SUCCESS:
show.setVisibility(View.INVISIBLE);
picturePath = "";
pathView.setText(picturePath);
Toast.makeText(getApplicationContext(), "上传成功！",
Toast.LENGTH_LONG).show();
break;
case FAILD:
show.setVisibility(View.INVISIBLE);
Toast.makeText(getApplicationContext(), "上传失败！",
Toast.LENGTH_LONG).show();
break;
default:
break;
}
return false;
}

});

private void initView() {
cancel = (TextView) findViewById(R.id.cancel);
upload = (TextView) findViewById(R.id.upload);
buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
cancel.setOnClickListener(this);
upload.setOnClickListener(this);
buttonLoadImage.setOnClickListener(this);
show = findViewById(R.id.show);
pathView = (EditText) findViewById(R.id.file_path);
pathView.setKeyListener(null);
}

private void initData() {
picturePath = "";
}

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.cancel:
finish();
break;
case R.id.buttonLoadPicture:
Intent intent = new Intent(getApplicationContext(),
FileSelectActivity.class);

startActivityForResult(intent, RESULT_LOAD_FILE);
break;
case R.id.upload:
uploadFile();
break;
default:
break;
}
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_FILE && resultCode == RESULT_LOAD_FILE
&& data != null) {
picturePath = data.getStringExtra("path");
pathView.setText(picturePath);
}
}

private void uploadFile() {
show.setVisibility(View.VISIBLE);
new Thread() {
@Override
public void run() {
File file=new File(picturePath);
UploadUtil uploadUtil=new UploadUtil();
uploadUtil.uploadFile(file, requestURL);
Message msg = new Message();

msg.what = SUCCESS;

mHandler.sendMessage(msg);

}
}.start();
}

@Override
protected void onDestroy() {
show.setVisibility(View.INVISIBLE);
super.onDestroy();
}
}

package ting.app.openwindow;

import java.io.File;
import java.util.Arrays;
import java.util.Comparator;

import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class FileSelectActivity extends ListActivity {
private static final String root = new String(Environment
.getExternalStorageDirectory().getPath() + File.separator);
private TextView tv;// 显示文件的目录
private File[] files;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_fileupload);
tv = (TextView) findViewById(R.id.currPath);
getFiles(root);
}

public void getFiles(String path) {

tv.setText(path);
File f = new File(path);
// 得到所有子文件和文件夹
File[] tem = f.listFiles();
// 如果当前的目录不是在顶层目录，就把父目录要到files数组中的第一个
if (!path.equals(root)) {
files = new File[tem.length + 1];
System.arraycopy(tem, 0, files, 1, tem.length);
files[0] = f.getParentFile();
} else {
files = tem;
}
Log.e("aaaaaaaaaa", files.toString());
sortFilesByDirectory(files);
// 为ListActivity设置Adapter
setListAdapter(new Adapter(this, files, files.length == tem.length));
}

// 对文件进行排序
private void sortFilesByDirectory(File[] files) {
Arrays.sort(files, new Comparator<File>() {
public int compare(File f1, File f2) {
return Long.valueOf(f1.length()).compareTo(f2.length());
}
});
}

@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
File f = files[position];
if (!f.canRead()) {
Toast.makeText(this, "文件不可读", Toast.LENGTH_SHORT).show();
return;
}
if (f.isFile()) {// 为文件
String path = f.getAbsolutePath();
Intent intent = new Intent();
intent.putExtra("path", path);
setResult(FileUploadActivity.RESULT_LOAD_FILE, intent);
finish();
} else {
getFiles(f.getAbsolutePath());
}
}

class Adapter extends BaseAdapter {
private File[] files;
private boolean istop;
private Context context;

public Adapter(Context context, File[] files, boolean istop) {
this.context = context;
this.files = files;
this.istop = istop;
}

@Override
public int getCount() {
return files.length;
}

@Override
public Object getItem(int position) {
return files[position];
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
Holder holder = null;
if (convertView == null) {
holder = new Holder();
convertView = View.inflate(context, R.layout.item_fileupload,
null);
holder.iv = (ImageView) convertView
.findViewById(R.id.adapter_icon);
holder.tv = (TextView) convertView
.findViewById(R.id.adapter_txt);
convertView.setTag(holder);
} else {
holder = (Holder) convertView.getTag();
}
// 设置convertView中控件的值
setconvertViewRow(position, holder);
return convertView;
}

private void setconvertViewRow(int position, Holder holder) {
File f = files[position];
holder.tv.setText(f.getName());
if (!istop && position == 0) {// 不是在顶层目录
// 加载后退图标
holder.iv.setImageResource(R.drawable.back_up);
} else if (f.isFile()) {// 是文件
// 加载文件图标
holder.iv.setImageResource(R.drawable.file);
} else {// 文件夹
// 加载文件夹图标
holder.iv.setImageResource(R.drawable.dir);
}
}

class Holder {
private ImageView iv;
private TextView tv;
}
}
}