android上传文件到服务器
重点:最好是设置好content-type这些参数的配置!
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 dujinyang
* QQ:1875125470
*/
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:abcdefg.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;
}
}
参数就一个File文件和一个请求上传的URL,
需要在XML文件上加入网络权限.
下面是Activity的代码:
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 dujinyang
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 dujinyang
*/
public class MainActivity extends Activity implements OnClickListener{
private static final String TAG = "uploadImage";
private static String requestURL = "http://192.168.1.160:8080/DUJINYANG/imgUpload";
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,那么才显示
*/
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();
}
}
public class MainActivity extends Activity implements OnClickListener{
private static final String TAG = "uploadImage";
private static String requestURL = "http://192.168.1.160:8080/DUJINYANG/imgUpload";
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,那么才显示
*/
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();
}
}
layout代码:
提示:如果想上传其他文件的话,可以修改过滤条件就可以了,
<?
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D"
android:id ="@+id/selectImage"
/>
< Button
android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
android:text ="上传图片D"
android:id ="@+id/uploadImage"
/>
< ImageView
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:id ="@+id/imageView"
/>
</ LinearLayout >
< 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D"
android:id ="@+id/selectImage"
/>
< Button
android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
android:text ="上传图片D"
android:id ="@+id/uploadImage"
/>
< ImageView
android:layout_width ="wrap_content"
android:layout_height ="wrap_content"
android:id ="@+id/imageView"
/>
</ LinearLayout >
同时文件的类型一定要和服务器端的文件类型保持一致,否则上传就失败了!