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andrid 上传图片 asp.net 后台接收并保存

android 端代码

  1 package com.example.uploadfile;
  2  
  3 import java.io.DataOutputStream;
  4 import java.io.File;
  5 import java.io.FileInputStream;
  6 import java.io.IOException;
  7 import java.io.InputStream;
  8 import java.net.HttpURLConnection;
  9 import java.net.MalformedURLException;
 10 import java.net.URL;
 11 import java.util.Map;
 12 
 13 public class PostFile {
 14        static String BOUNDARY = java.util.UUID.randomUUID().toString();
 15        static  String PREFIX = "--";
 16        static String  LINEND = "
";
 17        static String MULTIPART_FROM_DATA = "multipart/form-data";
 18        static String CHARSET = "UTF-8"; 
 19        static String result =null;
 20        static int SO_TIMEOUT=5*1000;
 21        
 22       //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
 23     public static String post(String actionUrl, Map<String, String> params,
 24             Map<String, File> files) throws IOException {
 25          try{
 26              URL url =new URL(actionUrl);
 27              HttpURLConnection conn = (HttpURLConnection) url.openConnection();
 28              conn.setReadTimeout(SO_TIMEOUT);
 29              conn.setConnectTimeout(SO_TIMEOUT);
 30              conn.setDoInput(true);// 允许输入流
 31              conn.setDoOutput(true);// 允许输出流
 32              conn.setUseCaches(false);// 不允许使用缓存
 33              conn.setRequestMethod("POST");// 请求方式
 34              conn.setRequestProperty("Charset",CHARSET);// 设置编码
 35              conn.setRequestProperty("connection","keep-alive");
 36              conn.setRequestProperty("Charsert", CHARSET);
 37              conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA +";boundary="+ BOUNDARY);
 38              /**
 39               * 当文件不为空，把文件包装并且上传
 40               */
 41               DataOutputStream dos =new DataOutputStream(
 42                             conn.getOutputStream());
 43               StringBuffer sb =new StringBuffer();
 44               for(Map.Entry<String, String> entry : params.entrySet()) {
 45                         sb.append(PREFIX);
 46                         sb.append(BOUNDARY);
 47                         sb.append(LINEND);
 48                         sb.append("Content-Disposition: form-data; name=""+ entry.getKey() +"""+ LINEND);
 49                         sb.append("Content-Type: application/octet-stream; charset="+CHARSET+ LINEND);
 50                         sb.append(LINEND);
 51                         sb.append(entry.getValue());
 52                         sb.append(LINEND);
 53                    }
 54                    if(files!=null){
 55                    for (Map.Entry<String, File> file : files.entrySet()) {
 56                        sb.append(PREFIX);
 57                        sb.append(BOUNDARY);
 58                        sb.append(LINEND);
 59                        /**
 60                         * 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
 61                         * filename是文件的名字，包含后缀名的 比如:abc.png
 62                         */
 63                        sb.append("Content-Disposition: form-data; name=""+file.getKey()+""; filename=""+ file.getValue() +"""+ LINEND);
 64                        sb.append("Content-Type: application/octet-stream; charset="+CHARSET+ LINEND);
 65                        sb.append(LINEND);
 66     
 67                        dos.write(sb.toString().getBytes());
 68                        InputStream is =new FileInputStream(file.getValue());
 69                        byte[] bytes =new byte[1024];
 70                        int len = 0;
 71                        while((len = is.read(bytes)) != -1) {
 72                             dos.write(bytes, 0, len);
 73                        }
 74                        is.close();
 75                        dos.write(LINEND.getBytes());
 76                    }
 77                    byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND).getBytes(); 
 78                    dos.write(end_data);
 79                    dos.flush();
 80                    /**
 81                     * 获取响应码 200=成功 当响应成功，获取响应的流
 82                     */
 83                    int res= conn.getResponseCode();
 84                    
 85                    InputStream input = conn.getInputStream();
 86                    StringBuffer sb1 =new StringBuffer();
 87                    int ss;
 88                    while((ss = input.read()) != -1) {
 89                         sb1.append((char) ss);
 90                    }
 91                    result = sb1.toString();
 92              }
 93         }catch(MalformedURLException e) {
 94              e.printStackTrace();
 95         }catch(IOException e) {
 96              e.printStackTrace();
 97         }
 98         return result;
 99     }
100     
101     
102     /**
103      * 上传单张图片加参数
104      *@paramfile 文件
105      *@paramfileName 服务器接口图片参数名称
106      *@paramRequestURL 上传URL
107      *@paramparams  参数
108      *@return
109      */
110     public static String PostData(File file,String fileName, String RequestURL,Map<String, String> params) {
111      
112          try{
113               URL url =new URL(RequestURL);
114               HttpURLConnection conn = (HttpURLConnection) url.openConnection();
115               conn.setReadTimeout(SO_TIMEOUT);
116               conn.setConnectTimeout(SO_TIMEOUT);
117               conn.setDoInput(true);// 允许输入流
118               conn.setDoOutput(true);// 允许输出流
119               conn.setUseCaches(false);// 不允许使用缓存
120               conn.setRequestMethod("POST");// 请求方式
121               conn.setRequestProperty("Charset",CHARSET);// 设置编码
122               conn.setRequestProperty("connection","keep-alive");
123               conn.setRequestProperty("Charsert", CHARSET);
124               conn.setRequestProperty("Content-Type", MULTIPART_FROM_DATA +";boundary="+ BOUNDARY);
125 
126               if(file !=null) {
127                     /**
128                      * 当文件不为空，把文件包装并且上传
129                      */
130                     DataOutputStream dos =new DataOutputStream(
131                               conn.getOutputStream());
132                     StringBuffer sb =new StringBuffer();
133 
134                     for(Map.Entry<String, String> entry : params.entrySet()) {
135                          sb.append(PREFIX);
136                          sb.append(BOUNDARY);
137                          sb.append(LINEND);
138                          sb.append("Content-Disposition: form-data; name=""+ entry.getKey() +"""+ LINEND);
139                          sb.append("Content-Type: application/octet-stream; charset="+CHARSET+ LINEND);
140                          sb.append(LINEND);
141                          sb.append(entry.getValue());
142                          sb.append(LINEND);
143                     }
144 
145                     sb.append(PREFIX);
146                     sb.append(BOUNDARY);
147                     sb.append(LINEND);
148                     /**
149                      * 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
150                      * filename是文件的名字，包含后缀名的 比如:abc.png
151                      */
152                     sb.append("Content-Disposition: form-data; name=""+fileName+""; filename=""+ file.getName() +"""+ LINEND);
153                     sb.append("Content-Type: application/octet-stream; charset="+CHARSET+ LINEND);
154                     sb.append(LINEND);
155 
156                     dos.write(sb.toString().getBytes());
157                     InputStream is =new FileInputStream(file);
158                     byte[] bytes =new byte[1024];
159                     int len = 0;
160                     while((len = is.read(bytes)) != -1) {
161                          dos.write(bytes, 0, len);
162                     }
163                     is.close();
164                     dos.write(LINEND.getBytes());
165                     byte[] end_data = (PREFIX + BOUNDARY + PREFIX + LINEND)
166                               .getBytes();
167                     dos.write(end_data);
168                     dos.flush();
169                     /**
170                      * 获取响应码 200=成功 当响应成功，获取响应的流
171                      */
172                     int res= conn.getResponseCode();
173                     
174                     InputStream input = conn.getInputStream();
175                     StringBuffer sb1 =new StringBuffer();
176                     int ss;
177                     while((ss = input.read()) != -1) {
178                          sb1.append((char) ss);
179                     }
180                     result = sb1.toString();
181               }
182          }catch(MalformedURLException e) {
183               e.printStackTrace();
184          }catch(IOException e) {
185               e.printStackTrace();
186          }
187          return result;
188     }
189 }

View Code

  1 package com.example.uploadfile;
  2 
  3 import java.io.File;
  4 import java.io.IOException;
  5 import java.util.HashMap;
  6 import java.util.Map;
  7 
  8 import android.app.Activity;
  9 import android.app.ProgressDialog;
 10 import android.graphics.Bitmap;
 11 import android.os.Bundle;
 12 import android.os.Environment;
 13 import android.os.Handler;
 14 import android.os.Message;
 15 import android.util.Log;
 16 import android.view.View;
 17 import android.widget.Button;
 18 
 19 
 20 public class MainActivity extends Activity {
 21     Button btn_upload,btn_upload1,btn_upload2,btn_upload3;
 22     Map<String, File> files;
 23     Map<String, String> params;
 24     String result="";
 25     private ProgressDialog pd;
 26     private String httpUrl="http://192.168.1.136/api.ashx";
 27     private String httpUrl1="http://192.168.1.136/upFiles.ashx";
 28      String path=Environment.getExternalStorageDirectory().getPath()+"/DCIM/Camera/IMG_20160103_122157.jpg";
 29         //String path=Environment.getExternalStorageDirectory().getPath()+"/DCIM/P60131-103130.JPG";
 30 
 31     @Override
 32     protected void onCreate(Bundle savedInstanceState) {
 33         super.onCreate(savedInstanceState);
 34         setContentView(R.layout.activity_main);
 35         btn_upload=(Button)this.findViewById(R.id.btn_upload); 
 36         btn_upload1=(Button)this.findViewById(R.id.btn_upload1); 
 37         btn_upload2=(Button)this.findViewById(R.id.btn_upload2); 
 38         btn_upload3=(Button)this.findViewById(R.id.btn_upload3); 
 39        
 40         
 41         btn_upload.setOnClickListener(new View.OnClickListener() {
 42             
 43             @Override
 44             public void onClick(View v) {
 45                 pd = new ProgressDialog(MainActivity.this);
 46                 pd.setMessage("正在上传...");
 47                 pd.show();
 48                 params=new HashMap<String, String>();
 49                 params.put("pictureName","aaaa.jpg");
 50                 files=new HashMap<String, File>();
 51                 files.put("picturePath", new File(path));
 52                 new Thread(new Runnable() {
 53                     @Override
 54                     public void run() {                     
 55                             try {
 56                                 result=PostFile.post(httpUrl, params, files);
 57                             } catch (IOException e) {
 58                                 e.printStackTrace();
 59                             }
 60                         Message msg=handler.obtainMessage();
 61                         msg.what=1;
 62                         handler.sendMessage(msg);
 63                     }
 64                 }).start();
 65             }
 66         });
 67         
 68         btn_upload1.setOnClickListener(new View.OnClickListener() {
 69             
 70             @Override
 71             public void onClick(View v) {
 72                 pd = new ProgressDialog(MainActivity.this);
 73                 pd.setMessage("正在上传...");
 74                 pd.show();
 75                 params=new HashMap<String, String>();
 76                 params.put("pictureName","aaaa.jpg");
 77                 files=new HashMap<String, File>();
 78                 files.put("picturePath", new File(path)); 
 79                 new Thread(new Runnable() {
 80                     @Override
 81                     public void run() {
 82                         result=PostFile.PostData(new File(path), "picturePath", httpUrl, params);                         
 83                         Message msg=handler.obtainMessage();
 84                         msg.what=1;
 85                         handler.sendMessage(msg);
 86                     }
 87                 }).start();
 88             }
 89         });
 90         
 91         btn_upload2.setOnClickListener(new View.OnClickListener() {
 92             
 93             @Override
 94             public void onClick(View v) {
 95                 pd = new ProgressDialog(MainActivity.this);
 96                 pd.setMessage("正在上传...");
 97                 pd.show();
 98                 Bitmap bitmap=ImageUtils.imageToBitmap(path);
 99                 String imageBase64=ImageUtils.convertIconToString(bitmap);
100                 params=new HashMap<String, String>();
101                 params.put("picturePath",imageBase64);
102                 files=new HashMap<String, File>();
103                 new Thread(new Runnable() {
104                     
105                     @Override
106                     public void run() { 
107                         try {
108                             result=PostFile.post(httpUrl1, params,files);
109                         } catch (IOException e) {
110                             e.printStackTrace();
111                         }
112                         Message msg=handler.obtainMessage();
113                         msg.what=1;
114                         handler.sendMessage(msg);
115                     }
116                 }).start();
117             }
118         });
119         
120         btn_upload3.setOnClickListener(new View.OnClickListener() {
121             
122             @Override
123             public void onClick(View v) {
124              
125             }
126         });
127         
128     } 
129     
130     private Handler handler=new Handler(){
131 
132         @Override
133         public void handleMessage(Message msg) { 
134             super.handleMessage(msg);
135             pd.dismiss();
136             Log.e("result", result);
137         }
138          
139     }; 
140 }

View Code

package com.example.uploadfile;

import java.io.ByteArrayOutputStream;

import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.util.Base64;

/**
 * 类       名:ImageUtils
 * 作       者:Free宇
 * 主要功能:
 * 创建日期 :2016-2-2 下午1:33:19
 * 参　　数:
 * 修  改  者:
 * 修改日期:
 * 修改内容:
 */
public class ImageUtils {
    /***
     * 动态设置inSampleSize 倍数
     * 
     * @param pathName
     *            图片路径
     * @param reqWidth
     *            要压缩的宽度
     * @param reqHeight
     *            要压缩的高度
     * @return
     */
    public static Bitmap imageToBitmap(String pathName) {
        // 首先设置 inJustDecodeBounds=true 来获取图片尺寸
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(pathName, options);
        // 计算 inSampleSize 的值
        options.inSampleSize =100;

        // 根据计算出的 inSampleSize 来解码图片生成Bitmap
        options.inJustDecodeBounds = false;
        return BitmapFactory.decodeFile(pathName, options);
    }
    
    
    /**  
     * 图片转成string  
     *   
     * @param bitmap  
     * @return  
     */  
    public static String convertIconToString(Bitmap bitmap)  
    {  
        ByteArrayOutputStream baos = new ByteArrayOutputStream();// outputstream  
        bitmap.compress(CompressFormat.PNG, 100, baos);  
        byte[] appicon = baos.toByteArray();// 转为byte数组  
        return Base64.encodeToString(appicon, Base64.DEFAULT);
  
    }  
}

View Code

asp.net 服务端代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace uploadFiles
{
    /// <summary>
    /// api 的摘要说明
    /// </summary>
    public class api : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            HttpPostedFile file = context.Request.Files["picturePath"];
            //可以用传入参数命名
            //String pictureName = context.Request.Form["pictureName"];
            if (file == null) {
                context.Response.Write(getGson(0, "404" + context.Request.Files.Count));
                return;
            }
            if (String.IsNullOrEmpty(file.FileName))
            {
                context.Response.Write(getGson(0, "405" + context.Request.Files.Count));
                return;
            }
            String imagePath = "/upload/" + DateTime.Now.ToString("yyyyMMdd") + "/";
            string physicsPath = HttpContext.Current.Server.MapPath("~" + imagePath);
            if (!System.IO.Directory.Exists(physicsPath))
            {
                System.IO.Directory.CreateDirectory(physicsPath);
            }

            //生成新文件名
            int index = file.FileName.LastIndexOf(".");
            string fileExt = file.FileName.Substring(index);
            string datestring = DateTime.Now.ToString("yyyyMMdd") + DateTime.Now.Millisecond.ToString();
            string pictureName = datestring + fileExt;
            file.SaveAs(physicsPath + pictureName);
            context.Response.Write(getGson(0, "200" + file.FileName));

        }

        private String getGson(int status,String msg)
        {
            String json = "{"status": " + status + ","msg": "" + msg + "","info":{"id":1}}";
            return json;
        }
     
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }


    }
}

View Code

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原文地址：https://www.cnblogs.com/freexiaoyu/p/5177751.html