android 上传文件到服务器

package

com.example.testandroid;

import

java.io.DataOutputStream;

import

java.io.FileInputStream;

import

java.io.InputStream;

import

java.net.HttpURLConnection;

import

java.net.URL;

import

android.app.Activity;

import

android.app.AlertDialog;

import

android.content.DialogInterface;

import

android.os.Bundle;

import

android.view.View;

import

android.widget.Button;

import

android.widget.TextView;

public

class

PhotoUpload

extends

Activity {

private

String newName =

"image.jpg"

;

private

String uploadFile =

"/sdcard/image.JPG"

;

// 要上传的文件

private

String actionUrl =

"http://192.168.0.1:8080/PhotoUpload/servlet/UploadServlet"

;

private

TextView mText1;

private

TextView mText2;

private

Button mButton;

@Override

public

void

onCreate(Bundle savedInstanceState) {

super

.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

mText1 = (TextView) findViewById(R.id.myText2);

// 文件路径：

mText1.setText(uploadFile);

mText2 = (TextView) findViewById(R.id.myText3);

// 上传网址：

mText2.setText(actionUrl);

/*设置mButton的onClick事件处理 */

mButton = (Button) findViewById(R.id.myButton);

mButton.setOnClickListener(

new

View.OnClickListener() {

public

void

onClick(View v) {

uploadFile();

}

});

}

/*上传文件至Server的方法 */

private

void

uploadFile() {

String end =

"\r\n"

;

String twoHyphens =

"--"

;

String boundary =

"*****"

;

try

{

URL url =

new

URL(actionUrl);

HttpURLConnection con = (HttpURLConnection) url.openConnection();

/*允许Input、Output，不使用Cache */

con.setDoInput(

true

);

con.setDoOutput(

true

);

con.setUseCaches(

false

);

// 设置http连接属性

con.setRequestMethod(

"POST"

);

con.setRequestProperty(

"Connection"

,

"Keep-Alive"

);

con.setRequestProperty(

"Charset"

,

"UTF-8"

);

con.setRequestProperty(

"Content-Type"

,

"multipart/form-data;boundary="

+boundary);

DataOutputStream ds =

new

DataOutputStream(con.getOutputStream());

ds.writeBytes(twoHyphens +boundary +end);

ds.writeBytes(

"Content-Disposition: form-data;"

+

"name=\"file1\";filename=\""

+newName +

"\""

+end);

ds.writeBytes(end);

// 取得文件的FileInputStream

FileInputStream fStream =

new

FileInputStream(uploadFile);

/*设置每次写入1024bytes */

int

bufferSize =

1024

;

byte

[] buffer =

new

byte

[bufferSize];

int

length = -

1

;

/*从文件读取数据至缓冲区 */

while

((length = fStream.read(buffer)) != -

1

) {

/*将资料写入DataOutputStream中 */

ds.write(buffer,

0

,length);

}

ds.writeBytes(end);

ds.writeBytes(twoHyphens +boundary +twoHyphens +end);

fStream.close();

ds.flush();

/*取得Response内容 */

InputStream is = con.getInputStream();

int

ch;

StringBuffer b =

new

StringBuffer();

while

((ch = is.read()) != -

1

) {

b.append((

char

) ch);

}

/*将Response显示于Dialog */

showDialog(

"上传成功"

+b.toString().trim());

/*关闭DataOutputStream */

ds.close();

}

catch

(Exception e) {

showDialog(

"上传失败"

+e);

}

}

/*显示Dialog的method */

private

void

showDialog(String mess) {

new

AlertDialog.Builder(PhotoUpload.

this

).setTitle(

"Message"

)

.setMessage(mess)

.setNegativeButton(

"确定"

,

new

DialogInterface.OnClickListener() {

public

void

onClick(DialogInterface dialog,

int

which) {

}

}).show();

}

}

package

com.demo;

import

java.io.File;

import

java.io.IOException;

import

java.util.Date;

import

java.util.Iterator;

import

java.util.List;

import

javax.servlet.ServletException;

import

javax.servlet.http.HttpServlet;

import

javax.servlet.http.HttpServletRequest;

import

javax.servlet.http.HttpServletResponse;

import

org.apache.commons.fileupload.DiskFileUpload;

import

org.apache.commons.fileupload.FileItem;

public

class

UploadServlet

extends

HttpServlet {

public

void

doPost(HttpServletRequest request,HttpServletResponse response)

throws

ServletException,IOException {

String temp = request.getSession().getServletContext().getRealPath(

"/"

)

+

"temp"

;

// 临时目录

System.out.println(

"temp="

+temp);

String loadpath = request.getSession().getServletContext()

.getRealPath(

"/"

)

+

"Image"

;

// 上传文件存放目录

System.out.println(

"loadpath="

+loadpath);

DiskFileUpload fu =

new

DiskFileUpload();

// 需要导入commons-fileupload-1.2.2.jar

// http://commons.apache.org/fileupload/

fu.setSizeMax(

1

*

1024

*

1024

);

// 设置允许用户上传文件大小,单位:字节

fu.setSizeThreshold(

4096

);

// 设置最多只允许在内存中存储的数据,单位:字节

fu.setRepositoryPath(temp);

// 设置一旦文件大小超过getSizeThreshold()的值时数据存放在硬盘的目录

// 开始读取上传信息

int

index =

0

;

List fileItems =

null

;

try

{

fileItems = fu.parseRequest(request);

System.out.println(

"fileItems="

+fileItems);

}

catch

(Exception e) {

e.printStackTrace();

}

Iterator iter = fileItems.iterator();

// 依次处理每个上传的文件

while

(iter.hasNext()) {

FileItem item = (FileItem) iter.next();

// 忽略其他不是文件域的所有表单信息

if

(!item.isFormField()) {

String name = item.getName();

// 获取上传文件名,包括路径

name = name.substring(name.lastIndexOf(

"\\"

) +

1

);

// 从全路径中提取文件名

long

size = item.getSize();

if

((name ==

null

|| name.equals(

""

)) && size ==

0

)

continue

;

int

point = name.indexOf(

"."

);

name = (

new

Date()).getTime()

+name.substring(point,name.length()) +index;

index++;

File fNew =

new

File(loadpath,name);

try

{

item.write(fNew);

}

catch

(Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

else

// 取出不是文件域的所有表单信息

{

String fieldvalue = item.getString();

// 如果包含中文应写为：(转为UTF-8编码)

// String fieldvalue = new

// String(item.getString().getBytes(),"UTF-8");

}

}

String text1 =

"11"

;

response.sendRedirect(

"result.jsp?text1="

+text1);

}

}

<

RelativeLayout

xmlns:android

=

"http://schemas.android.com/apk/res/android"

xmlns:tools

=

"http://schemas.android.com/tools"

android:layout_width

=

"match_parent"

android:layout_height

=

"match_parent"

>

<

EditText

android:id

=

"@+id/myText2"

android:layout_width

=

"wrap_content"

android:layout_height

=

"wrap_content"

android:layout_alignParentTop

=

"true"

android:layout_centerHorizontal

=

"true"

android:layout_marginTop

=

"116dp"

android:ems

=

"10"

android:inputType

=

"textPersonName"

/>

<

EditText

android:id

=

"@+id/myText3"

android:layout_width

=

"wrap_content"

android:layout_height

=

"wrap_content"

android:layout_alignLeft

=

"@+id/myText2"

android:layout_below

=

"@+id/myText2"

android:layout_marginTop

=

"45dp"

android:ems

=

"10"

/>

<

Button

android:id

=

"@+id/myButton"

android:layout_width

=

"wrap_content"

android:layout_height

=

"wrap_content"

android:layout_below

=

"@+id/myText3"

android:layout_centerHorizontal

=

"true"

android:layout_marginTop

=

"61dp"

android:text

=

"上传"

/>

</

RelativeLayout

>