上传文件到服务器 android 上传文件到服务器代码实例

package com.spring.sky.image.upload.network;

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
 * Email:vipa1888@163.com
 * QQ:840950105
 * MyName:石明政
 */
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 static 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 com.spring.sky.image.upload;

import java.io.File;

import com.spring.sky.image.upload.network.UploadUtil;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ContentResolver;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
/**
 * Activity 上传的界面
 * @author spring sky
 * Email:vipa1888@163.com
 * QQ:840950105
 * MyName:石明政
 *
 */
public class MainActivity extends Activity implements OnClickListener{
    private static final String TAG = "uploadImage";
    private static String requestURL = "http://192.168.1.14:8080/SetBlobData/img!up";
    private Button selectImage,uploadImage;
    private ImageView imageView;

    private String picPath = null;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        selectImage = (Button) this.findViewById(R.id.selectImage);
        uploadImage = (Button) this.findViewById(R.id.uploadImage);
        selectImage.setOnClickListener(this);
        uploadImage.setOnClickListener(this);

        imageView = (ImageView) this.findViewById(R.id.imageView);

       
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.selectImage:
            /***
             * 这个是调用android内置的intent，来过滤图片文件   ，同时也可以过滤其他的 
             */
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(intent, 1);
            break;
        case R.id.uploadImage:
            File file = new File(picPath);
            if(file!=null)
            {
                String request = UploadUtil.uploadFile( file, requestURL);
                uploadImage.setText(request);
            }
            break;
        default:
            break;
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(resultCode==Activity.RESULT_OK)
        {
            /**
             * 当选择的图片不为空的话，在获取到图片的途径 
             */
            Uri uri = data.getData();
            Log.e(TAG, "uri = "+ uri);
            try {
                String[] pojo = {MediaStore.Images.Media.DATA};

                Cursor cursor = managedQuery(uri, pojo, null, null,null);
                if(cursor!=null)
                {
                    ContentResolver cr = this.getContentResolver();
                    int colunm_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                    cursor.moveToFirst();
                    String path = cursor.getString(colunm_index);
                    /***
                     * 这里加这样一个判断主要是为了第三方的软件选择，比如：使用第三方的文件管理器的话，你选择的文件就不一定是图片了，这样的话，我们判断文件的后缀名
                     * 如果是图片格式的话，那么才可以  
                     */
                    if(path.endsWith("jpg")||path.endsWith("png"))
                    {
                        picPath = path;
                        Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
                        imageView.setImageBitmap(bitmap);
                    }else{alert();}
                }else{alert();}

            } catch (Exception e) {
            }
        }

        super.onActivityResult(requestCode, resultCode, data);
    }

    private void alert()
    {
        Dialog dialog = new AlertDialog.Builder(this)
        .setTitle("提示")
        .setMessage("您选择的不是有效的图片")
        .setPositiveButton("确定",
                new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog,
                            int which) {
                        picPath = null;
                    }
                })
        .create();
        dialog.show();
    }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <Button 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="选择图片"
    android:id="@+id/selectImage"
    />
    <Button 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="上传图片"
    android:id="@+id/uploadImage"
    />
     <ImageView 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/imageView"
    />
</LinearLayout>