ajax上傳文件后，后臺(tái)java如何接收（求后臺(tái)接收的完整代碼）

寫一個(gè)servlet或jsp來接收，在servlet或jsp處理業(yè)務(wù)邏輯，后返回處理結(jié)果或新的數(shù)據(jù)

創(chuàng)新互聯(lián)于2013年成立，先為高昌等服務(wù)建站，高昌等地企業(yè)，進(jìn)行企業(yè)商務(wù)咨詢服務(wù)。為高昌企業(yè)網(wǎng)站制作PC+手機(jī)+微官網(wǎng)三網(wǎng)同步一站式服務(wù)解決您的所有建站問題。

如jsp：

%@ page errorPage="/common/error/error.jsp" %

%@ page contentType="text/html;charset=GBK"%

%

String planeNumber = request.getParameter("planeNumber");

String planeType = com.aerolink.aocs.system.parameter.list.PlaneTypeFactory.getPlaneType(planeNumber);

response.getWriter().write(planeType);%

Java服務(wù)器怎么接收手機(jī)上傳過來的文件。求具體代碼，謝謝，如果覺得懸賞太少的話可以說，我再加。急。。

android客戶端代碼:

public class MainActivity extends Activity

{

private TextView uploadInfo;

@Override

protected void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

uploadInfo = (TextView) findViewById(R.id.upload_info);

uploadFile();

}

public void uploadFile()

{

//服務(wù)器端地址

String url = "";

//手機(jī)端要上傳的文件，首先要保存你手機(jī)上存在該文件

String filePath = Environment.getExternalStorageDirectory()

+ "/1/power.apk";

AsyncHttpClient httpClient = new AsyncHttpClient();

RequestParams param = new RequestParams();

try

{

param.put("file", new File(filePath));

param.put("content", "liucanwen");

httpClient.post(url, param, new AsyncHttpResponseHandler()

{

@Override

public void onStart()

{

super.onStart();

uploadInfo.setText("正在上傳...");

}

@Override

public void onSuccess(String arg0)

{

super.onSuccess(arg0);

Log.i("ck", "success" + arg0);

if(arg0.equals("success"))

{

Toast.makeText(MainActivity.this, "上傳成功！", 1000).show();

}

uploadInfo.setText(arg0);

}

@Override

public void onFailure(Throwable arg0, String arg1)

{

super.onFailure(arg0, arg1);

uploadInfo.setText("上傳失?。?);

}

});

} catch (FileNotFoundException e)

{

e.printStackTrace();

Toast.makeText(MainActivity.this, "上傳文件不存在！", 1000).show();

}

}

}

服務(wù)器端代碼：

public class UploadFileServlet extends HttpServlet

{

public void doPost(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException

{

response.setContentType("text/html");

PrintWriter out = response.getWriter();

// 創(chuàng)建文件項(xiàng)目工廠對(duì)象

DiskFileItemFactory factory = new DiskFileItemFactory();

// 設(shè)置文件上傳路徑

String upload = this.getServletContext().getRealPath("/upload/");

// 獲取系統(tǒng)默認(rèn)的臨時(shí)文件保存路徑，該路徑為Tomcat根目錄下的temp文件夾

String temp = System.getProperty("java.io.tmpdir");

// 設(shè)置緩沖區(qū)大小為 5M

factory.setSizeThreshold(1024 * 1024 * 5);

// 設(shè)置臨時(shí)文件夾為temp

factory.setRepository(new File(temp));

// 用工廠實(shí)例化上傳組件,ServletFileUpload 用來解析文件上傳請(qǐng)求

ServletFileUpload servletFileUpload = new ServletFileUpload(factory);

// 解析結(jié)果放在List中

try

{

ListFileItem list = servletFileUpload.parseRequest(request);

for (FileItem item : list)

{

String name = item.getFieldName();

InputStream is = item.getInputStream();

if (name.contains("content"))

{

System.out.println(inputStream2String(is));

} else if(name.contains("file"))

{

try

{

inputStream2File(is, upload + "\\" + item.getName());

} catch (Exception e)

{

e.printStackTrace();

}

}

}

out.write("success");

} catch (FileUploadException e)

{

e.printStackTrace();

out.write("failure");

}

out.flush();

out.close();

}

// 流轉(zhuǎn)化成字符串

public static String inputStream2String(InputStream is) throws IOException

{

ByteArrayOutputStream baos = new ByteArrayOutputStream();

int i = -1;

while ((i = is.read()) != -1)

{

baos.write(i);

}

return baos.toString();

}

// 流轉(zhuǎn)化成文件

public static void inputStream2File(InputStream is, String savePath)

throws Exception

{

System.out.println("文件保存路徑為:" + savePath);

File file = new File(savePath);

InputStream inputSteam = is;

BufferedInputStream fis = new BufferedInputStream(inputSteam);

FileOutputStream fos = new FileOutputStream(file);

int f;

while ((f = fis.read()) != -1)

{

fos.write(f);

}

fos.flush();

fos.close();

fis.close();

inputSteam.close();

}

}

急求Java文件傳輸源代碼？？？急用！??！多謝各位了！??！

.服務(wù)器端

package sterning;

import java.io.BufferedInputStream;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.net.ServerSocket;

import java.net.Socket;

public class ServerTest {

int port = 8821;

void start() {

Socket s = null;

try {

ServerSocket ss = new ServerSocket(port);

while (true) {

// 選擇進(jìn)行傳輸?shù)奈募?/p>

String filePath = "D:\\lib.rar";

File fi = new File(filePath);

System.out.println("文件長(zhǎng)度:" + (int) fi.length());

// public Socket accept() throws

// IOException偵聽并接受到此套接字的連接。此方法在進(jìn)行連接之前一直阻塞。

s = ss.accept();

System.out.println("建立socket鏈接");

DataInputStream dis = new DataInputStream(new BufferedInputStream(s.getInputStream()));

dis.readByte();

DataInputStream fis = new DataInputStream(new BufferedInputStream(new FileInputStream(filePath)));

DataOutputStream ps = new DataOutputStream(s.getOutputStream());

//將文件名及長(zhǎng)度傳給客戶端。這里要真正適用所有平臺(tái)，例如中文名的處理，還需要加工，具體可以參見Think In Java 4th里有現(xiàn)成的代碼。

ps.writeUTF(fi.getName());

ps.flush();

ps.writeLong((long) fi.length());

ps.flush();

int bufferSize = 8192;

byte[] buf = new byte[bufferSize];

while (true) {

int read = 0;

if (fis != null) {

read = fis.read(buf);

}

if (read == -1) {

break;

}

ps.write(buf, 0, read);

}

ps.flush();

// 注意關(guān)閉socket鏈接哦，不然客戶端會(huì)等待server的數(shù)據(jù)過來，

// 直到socket超時(shí)，導(dǎo)致數(shù)據(jù)不完整。

fis.close();

s.close();

System.out.println("文件傳輸完成");

}

} catch (Exception e) {

e.printStackTrace();

}

}

public static void main(String arg[]) {

new ServerTest().start();

}

}

2.socket的Util輔助類

package sterning;

import java.net.*;

import java.io.*;

public class ClientSocket {

private String ip;

private int port;

private Socket socket = null;

DataOutputStream out = null;

DataInputStream getMessageStream = null;

public ClientSocket(String ip, int port) {

this.ip = ip;

this.port = port;

}

/** *//**

* 創(chuàng)建socket連接

*

* @throws Exception

* exception

*/

public void CreateConnection() throws Exception {

try {

socket = new Socket(ip, port);

} catch (Exception e) {

e.printStackTrace();

if (socket != null)

socket.close();

throw e;

} finally {

}

}

public void sendMessage(String sendMessage) throws Exception {

try {

out = new DataOutputStream(socket.getOutputStream());

if (sendMessage.equals("Windows")) {

out.writeByte(0x1);

out.flush();

return;

}

if (sendMessage.equals("Unix")) {

out.writeByte(0x2);

out.flush();

return;

}

if (sendMessage.equals("Linux")) {

out.writeByte(0x3);

out.flush();

} else {

out.writeUTF(sendMessage);

out.flush();

}

} catch (Exception e) {

e.printStackTrace();

if (out != null)

out.close();

throw e;

} finally {

}

}

public DataInputStream getMessageStream() throws Exception {

try {

getMessageStream = new DataInputStream(new BufferedInputStream(socket.getInputStream()));

return getMessageStream;

} catch (Exception e) {

e.printStackTrace();

if (getMessageStream != null)

getMessageStream.close();

throw e;

} finally {

}

}

public void shutDownConnection() {

try {

if (out != null)

out.close();

if (getMessageStream != null)

getMessageStream.close();

if (socket != null)

socket.close();

} catch (Exception e) {

}

}

}

3.客戶端

package sterning;

import java.io.BufferedOutputStream;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.FileOutputStream;

public class ClientTest {

private ClientSocket cs = null;

private String ip = "localhost";// 設(shè)置成服務(wù)器IP

private int port = 8821;

private String sendMessage = "Windwos";

public ClientTest() {

try {

if (createConnection()) {

sendMessage();

getMessage();

}

} catch (Exception ex) {

ex.printStackTrace();

}

}

private boolean createConnection() {

cs = new ClientSocket(ip, port);

try {

cs.CreateConnection();

System.out.print("連接服務(wù)器成功!" + "\n");

return true;

} catch (Exception e) {

System.out.print("連接服務(wù)器失敗!" + "\n");

return false;

}

}

private void sendMessage() {

if (cs == null)

return;

try {

cs.sendMessage(sendMessage);

} catch (Exception e) {

System.out.print("發(fā)送消息失敗!" + "\n");

}

}

private void getMessage() {

if (cs == null)

return;

DataInputStream inputStream = null;

try {

inputStream = cs.getMessageStream();

} catch (Exception e) {

System.out.print("接收消息緩存錯(cuò)誤\n");

return;

}

try {

//本地保存路徑，文件名會(huì)自動(dòng)從服務(wù)器端繼承而來。

String savePath = "E:\\";

int bufferSize = 8192;

byte[] buf = new byte[bufferSize];

int passedlen = 0;

long len=0;

savePath += inputStream.readUTF();

DataOutputStream fileOut = new DataOutputStream(new BufferedOutputStream(new BufferedOutputStream(new FileOutputStream(savePath))));

len = inputStream.readLong();

System.out.println("文件的長(zhǎng)度為:" + len + "\n");

System.out.println("開始接收文件!" + "\n");

while (true) {

int read = 0;

if (inputStream != null) {

read = inputStream.read(buf);

}

passedlen += read;

if (read == -1) {

break;

}

//下面進(jìn)度條本為圖形界面的prograssBar做的，這里如果是打文件，可能會(huì)重復(fù)打印出一些相同的百分比

System.out.println("文件接收了" + (passedlen * 100/ len) + "%\n");

fileOut.write(buf, 0, read);

}

System.out.println("接收完成，文件存為" + savePath + "\n");

fileOut.close();

} catch (Exception e) {

System.out.println("接收消息錯(cuò)誤" + "\n");

return;

}

}

public static void main(String arg[]) {

new ClientTest();

}

}

新聞名稱：java文件接收代碼,上傳文件java代碼
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