Android神奇编程之通过SOCKET协议实现断点续传上传
2012-09-13 15:59
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通过SOCKET协议实现断点续传上传
packagecn.itcast.net.server;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.OutputStream;
importjava.io.PushbackInputStream;
importjava.io.RandomAccessFile;
importjava.net.ServerSocket;
importjava.net.Socket;
importjava.text.SimpleDateFormat;
importjava.util.Date;
importjava.util.HashMap;
importjava.util.Map;
importjava.util.Properties;
importjava.util.concurrent.ExecutorService;
importjava.util.concurrent.Executors;
importcn.itcast.utils.StreamTool;
publicclass FileServer {
private ExecutorService executorService;//线程池
private int port;//监听端口
private boolean quit = false;//退出
private ServerSocket server;
private Map<Long, FileLog> datas = newHashMap<Long, FileLog>();//存放断点数据
public FileServer(int port){
this.port = port;
//创建线程池，池中具有(cpu个数*50)条线程
//创建固定数量的线程池 获取cpu的个数
100个并发链接
executorService =Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() * 50);
}
/**
*退出
*/
public void quit(){
this.quit = true;
try {
server.close();
} catch (IOException e) {
}
}
/**
*启动服务
*@throws Exception
*/
public void start() throws Exception{
//建立服务器端口事例
server = new ServerSocket(port);
while(!quit){
try {
//接受客户端链接
Socket socket = server.accept();
//为支持多用户并发访问，采用线程池管理每一个用户的连接请求
executorService.execute(new SocketTask(socket));
} catch (Exception e) {
e.printStackTrace();
}
}
}
private final class SocketTask implementsRunnable{
private Socket socket = null;
public SocketTask(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
try {
System.out.println("acceptedconnection "+ socket.getInetAddress()+ ":"+ socket.getPort());
PushbackInputStreaminStream = new PushbackInputStream(socket.getInputStream());
//得到客户端发来的第一行协议数据：Content-Length=143253434;filename=xxx.3gp;sourceid=
//如果用户初次上传文件，sourceid的值为空。
String head =StreamTool.readLine(inStream);
System.out.println(head);
if(head!=null){
//下面从协议数据中提取各项参数值
String[]items = head.split(";");
Stringfilelength = items[0].substring(items[0].indexOf("=")+1);
Stringfilename = items[1].substring(items[1].indexOf("=")+1);
Stringsourceid = items[2].substring(items[2].indexOf("=")+1);
long id =System.currentTimeMillis();//生产资源id，如果需要唯一性，可以采用UUID
FileLog log =null;
if(sourceid!=null&& !"".equals(sourceid)){
id =Long.valueOf(sourceid);
log =find(id);//查找上传的文件是否存在上传记录
}
File file =null;
int position= 0;
if(log==null){//如果上传的文件不存在上传记录,为文件添加跟踪记录
Stringpath = new SimpleDateFormat("yyyy/MM/dd/HH/mm").format(new Date());
Filedir = new File("file/"+ path);
if(!dir.exists())dir.mkdirs();
file =new File(dir, filename);
if(file.exists()){//如果上传的文件发生重名，然后进行改名
filename= filename.substring(0, filename.indexOf(".")-1)+dir.listFiles().length+ filename.substring(filename.indexOf("."));
file= new File(dir, filename);
}
save(id,file);
}else{//如果上传的文件存在上传记录,读取上次的断点位置
file =new File(log.getPath());//从上传记录中得到文件的路径
if(file.exists()){
FilelogFile = new File(file.getParentFile(), file.getName()+".log");
if(logFile.exists()){
Propertiesproperties = new Properties();
properties.load(newFileInputStream(logFile));
position= Integer.valueOf(properties.getProperty("length"));//读取断点位置
}
}
}
OutputStreamoutStream = socket.getOutputStream();
Stringresponse = "sourceid="+ id+ ";position="+ position+"\r\n";
//服务器收到客户端的请求信息后，给客户端返回响应信息：sourceid=1274773833264;position=0
//sourceid由服务器端生成，唯一标识上传的文件，position指示客户端从文件的什么位置开始上传
outStream.write(response.getBytes());
RandomAccessFilefileOutStream = new RandomAccessFile(file, "rwd");
if(position==0)fileOutStream.setLength(Integer.valueOf(filelength));//设置文件长度
fileOutStream.seek(position);//移动文件指定的位置开始写入数据
byte[] buffer= new byte[1024];
int len = -1;
int length =position;
while((len=inStream.read(buffer)) != -1){//从输入流中读取数据写入到文件中
fileOutStream.write(buffer,0, len);
length+= len;
Propertiesproperties = new Properties();
properties.put("length",String.valueOf(length));
FileOutputStreamlogFile = new FileOutputStream(new File(file.getParentFile(),file.getName()+".log"));
properties.store(logFile,null);//实时记录文件的最后保存位置
logFile.close();
}
if(length==fileOutStream.length())delete(id);
fileOutStream.close();
inStream.close();
outStream.close();
file = null;
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
if(socket!=null &&!socket.isClosed()) socket.close();
} catch (IOException e) {}
}
}
}
public FileLog find(Long sourceid){
return datas.get(sourceid);
}
//保存上传记录
public void save(Long id, File saveFile){
//日后可以改成通过数据库存放
datas.put(id, new FileLog(id,saveFile.getAbsolutePath()));
}
//当文件上传完毕，删除记录
public void delete(long sourceid){
if(datas.containsKey(sourceid))datas.remove(sourceid);
}
private class FileLog{
private Long id;
private String path;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public FileLog(Long id, Stringpath) {
this.id = id;
this.path = path;
}
}
}
packagecn.itcast.net.client;
importjava.io.ByteArrayOutputStream;
importjava.io.File;
importjava.io.InputStream;
importjava.io.OutputStream;
importjava.io.PushbackInputStream;
importjava.io.RandomAccessFile;
importjava.net.Socket;
importcn.itcast.utils.StreamTool;
publicclass SocketClient {
/**
*@param args
*/
public static void main(String[] args) {
try {
// Socketsocket = new Socket("127.0.0.1", 7878);
Socket socket = newSocket("127.0.0.1", 7878);
OutputStream outStream =socket.getOutputStream();
String filename ="QQWubiSetup.exe";
File file = new File(filename);
String head ="Content-Length="+ file.length() + ";filename="+ filename +";sourceid=\r\n";
outStream.write(head.getBytes());
PushbackInputStream inStream = newPushbackInputStream(socket.getInputStream());
String response =StreamTool.readLine(inStream);
System.out.println(response);
String[] items =response.split(";");
String position =items[1].substring(items[1].indexOf("=")+1);
RandomAccessFile fileOutStream= new RandomAccessFile(file, "r");
fileOutStream.seek(Integer.valueOf(position));
byte[] buffer = newbyte[1024];
int len = -1;
int i = 0;
while( (len =fileOutStream.read(buffer)) != -1){
outStream.write(buffer,0, len);
i++;
//if(i==10) break;
}
fileOutStream.close();
outStream.close();
inStream.close();
socket.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
*读取流
* @param inStream
* @return字节数组
* @throws Exception
*/
public static byte[]readStream(InputStream inStream) throws Exception{
ByteArrayOutputStreamoutSteam = new ByteArrayOutputStream();
byte[] buffer = newbyte[1024];
int len = -1;
while((len=inStream.read(buffer)) != -1){
outSteam.write(buffer,0, len);
}
outSteam.close();
inStream.close();
returnoutSteam.toByteArray();
}
}
视频上传package cn.itcast.upload;
importjava.io.File;
importjava.io.OutputStream;
importjava.io.PushbackInputStream;
importjava.io.RandomAccessFile;
importjava.net.Socket;
importcn.itcast.service.UploadLogService;
importcn.itcast.utils.StreamTool;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.os.Environment;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.ProgressBar;
importandroid.widget.TextView;
importandroid.widget.Toast;
publicclass MainActivity extends Activity {
private EditText filenameText;
private TextView resultView;
private ProgressBar uploadbar;
private UploadLogService service;
private Handler handler = new Handler(){
@Override
public void handleMessage(Messagemsg) {
uploadbar.setProgress(msg.getData().getInt("length"));
float num =(float)uploadbar.getProgress() / (float)uploadbar.getMax();
int result = (int)(num *100);
resultView.setText(result +"%");
if(uploadbar.getProgress()== uploadbar.getMax()){
Toast.makeText(MainActivity.this,R.string.success, 1).show();
}
}
};
@Override
public void onCreate(BundlesavedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
service = new UploadLogService(this);
filenameText =(EditText)findViewById(R.id.filename);
resultView =(TextView)findViewById(R.id.result);
uploadbar =(ProgressBar)findViewById(R.id.uploadbar);
Button button =(Button)findViewById(R.id.button);
button.setOnClickListener(newView.OnClickListener() {
@Override
public void onClick(View v){
String filename =filenameText.getText().toString();
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
File file =new File(Environment.getExternalStorageDirectory(), filename);
if(file.exists()){
uploadbar.setMax((int)file.length());
uploadFile(file);
}else{
Toast.makeText(MainActivity.this,R.string.notexsit, 1).show();
}
}else{
Toast.makeText(MainActivity.this,R.string.sdcarderror, 1).show();
}
}
});
}
private void uploadFile(final File file){
new Thread(new Runnable() {
@Override
public void run() {
try {
Stringsourceid = service.getBindId(file);
Socket socket= new Socket("192.168.1.10", 7878);
OutputStream outStream =socket.getOutputStream();
String head ="Content-Length="+ file.length() + ";filename="+file.getName()
+";sourceid="+(sourceid!=null ? sourceid :"")+"\r\n";
outStream.write(head.getBytes());
PushbackInputStream inStream = newPushbackInputStream(socket.getInputStream());
Stringresponse = StreamTool.readLine(inStream);
String[] items =response.split(";");
StringresponseSourceid = items[0].substring(items[0].indexOf("=")+1);
Stringposition = items[1].substring(items[1].indexOf("=")+1);
if(sourceid==null){//如果是第一次上传文件，在数据库中存在该文件所绑定的资源id
service.save(responseSourceid,file);
}
RandomAccessFilefileOutStream = new RandomAccessFile(file, "r");
fileOutStream.seek(Integer.valueOf(position));
byte[] buffer= new byte[1024];
int len = -1;
int length =Integer.valueOf(position);
while( (len =fileOutStream.read(buffer)) != -1){
outStream.write(buffer,0, len);
length+= len;//累加已经上传的数据长度
Messagemsg = new Message();
msg.getData().putInt("length",length);
handler.sendMessage(msg);
}
if(length ==file.length()) service.delete(file);
fileOutStream.close();
outStream.close();
inStream.close();
socket.close();
} catch (Exception e) {
Toast.makeText(MainActivity.this,R.string.error, 1).show();
}
}
}).start();
}
}
packagecn.itcast.utils;
importjava.io.ByteArrayOutputStream;
importjava.io.File;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.PushbackInputStream;
publicclass StreamTool {
public static void save(File file, byte[]data) throws Exception {
FileOutputStream outStream = newFileOutputStream(file);
outStream.write(data);
outStream.close();
}
public static StringreadLine(PushbackInputStream in) throws IOException {
char buf[] = new char[128];
int room = buf.length;
int offset = 0;
int c;
loop: while (true) {
switch (c =in.read()) {
case -1:
case '\n':
breakloop;
case '\r':
int c2= in.read();
if((c2 != '\n') && (c2 != -1)) in.unread(c2);
breakloop;
default:
if(--room < 0) {
char[]lineBuffer = buf;
buf = new char[offset + 128];
room = buf.length - offset - 1;
System.arraycopy(lineBuffer, 0, buf, 0,offset);
}
buf[offset++]= (char) c;
break;
}
}
if ((c == -1) &&(offset == 0)) return null;
returnString.copyValueOf(buf, 0, offset);
}
/**
*读取流
* @param inStream
* @return字节数组
* @throws Exception
*/
public static byte[]readStream(InputStream inStream) throws Exception{
ByteArrayOutputStreamoutSteam = new ByteArrayOutputStream();
byte[] buffer = newbyte[1024];
int len = -1;
while((len=inStream.read(buffer)) != -1){
outSteam.write(buffer,0, len);
}
outSteam.close();
inStream.close();
returnoutSteam.toByteArray();
}
}
packagecn.itcast.net.server;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.OutputStream;
importjava.io.PushbackInputStream;
importjava.io.RandomAccessFile;
importjava.net.ServerSocket;
importjava.net.Socket;
importjava.text.SimpleDateFormat;
importjava.util.Date;
importjava.util.HashMap;
importjava.util.Map;
importjava.util.Properties;
importjava.util.concurrent.ExecutorService;
importjava.util.concurrent.Executors;
importcn.itcast.utils.StreamTool;
publicclass FileServer {
private ExecutorService executorService;//线程池
private int port;//监听端口
private boolean quit = false;//退出
private ServerSocket server;
private Map<Long, FileLog> datas = newHashMap<Long, FileLog>();//存放断点数据
public FileServer(int port){
this.port = port;
//创建线程池，池中具有(cpu个数*50)条线程
//创建固定数量的线程池 获取cpu的个数
100个并发链接
executorService =Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() * 50);
}
/**
*退出
*/
public void quit(){
this.quit = true;
try {
server.close();
} catch (IOException e) {
}
}
/**
*启动服务
*@throws Exception
*/
public void start() throws Exception{
//建立服务器端口事例
server = new ServerSocket(port);
while(!quit){
try {
//接受客户端链接
Socket socket = server.accept();
//为支持多用户并发访问，采用线程池管理每一个用户的连接请求
executorService.execute(new SocketTask(socket));
} catch (Exception e) {
e.printStackTrace();
}
}
}
private final class SocketTask implementsRunnable{
private Socket socket = null;
public SocketTask(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
try {
System.out.println("acceptedconnection "+ socket.getInetAddress()+ ":"+ socket.getPort());
PushbackInputStreaminStream = new PushbackInputStream(socket.getInputStream());
//得到客户端发来的第一行协议数据：Content-Length=143253434;filename=xxx.3gp;sourceid=
//如果用户初次上传文件，sourceid的值为空。
String head =StreamTool.readLine(inStream);
System.out.println(head);
if(head!=null){
//下面从协议数据中提取各项参数值
String[]items = head.split(";");
Stringfilelength = items[0].substring(items[0].indexOf("=")+1);
Stringfilename = items[1].substring(items[1].indexOf("=")+1);
Stringsourceid = items[2].substring(items[2].indexOf("=")+1);
long id =System.currentTimeMillis();//生产资源id，如果需要唯一性，可以采用UUID
FileLog log =null;
if(sourceid!=null&& !"".equals(sourceid)){
id =Long.valueOf(sourceid);
log =find(id);//查找上传的文件是否存在上传记录
}
File file =null;
int position= 0;
if(log==null){//如果上传的文件不存在上传记录,为文件添加跟踪记录
Stringpath = new SimpleDateFormat("yyyy/MM/dd/HH/mm").format(new Date());
Filedir = new File("file/"+ path);
if(!dir.exists())dir.mkdirs();
file =new File(dir, filename);
if(file.exists()){//如果上传的文件发生重名，然后进行改名
filename= filename.substring(0, filename.indexOf(".")-1)+dir.listFiles().length+ filename.substring(filename.indexOf("."));
file= new File(dir, filename);
}
save(id,file);
}else{//如果上传的文件存在上传记录,读取上次的断点位置
file =new File(log.getPath());//从上传记录中得到文件的路径
if(file.exists()){
FilelogFile = new File(file.getParentFile(), file.getName()+".log");
if(logFile.exists()){
Propertiesproperties = new Properties();
properties.load(newFileInputStream(logFile));
position= Integer.valueOf(properties.getProperty("length"));//读取断点位置
}
}
}
OutputStreamoutStream = socket.getOutputStream();
Stringresponse = "sourceid="+ id+ ";position="+ position+"\r\n";
//服务器收到客户端的请求信息后，给客户端返回响应信息：sourceid=1274773833264;position=0
//sourceid由服务器端生成，唯一标识上传的文件，position指示客户端从文件的什么位置开始上传
outStream.write(response.getBytes());
RandomAccessFilefileOutStream = new RandomAccessFile(file, "rwd");
if(position==0)fileOutStream.setLength(Integer.valueOf(filelength));//设置文件长度
fileOutStream.seek(position);//移动文件指定的位置开始写入数据
byte[] buffer= new byte[1024];
int len = -1;
int length =position;
while((len=inStream.read(buffer)) != -1){//从输入流中读取数据写入到文件中
fileOutStream.write(buffer,0, len);
length+= len;
Propertiesproperties = new Properties();
properties.put("length",String.valueOf(length));
FileOutputStreamlogFile = new FileOutputStream(new File(file.getParentFile(),file.getName()+".log"));
properties.store(logFile,null);//实时记录文件的最后保存位置
logFile.close();
}
if(length==fileOutStream.length())delete(id);
fileOutStream.close();
inStream.close();
outStream.close();
file = null;
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
if(socket!=null &&!socket.isClosed()) socket.close();
} catch (IOException e) {}
}
}
}
public FileLog find(Long sourceid){
return datas.get(sourceid);
}
//保存上传记录
public void save(Long id, File saveFile){
//日后可以改成通过数据库存放
datas.put(id, new FileLog(id,saveFile.getAbsolutePath()));
}
//当文件上传完毕，删除记录
public void delete(long sourceid){
if(datas.containsKey(sourceid))datas.remove(sourceid);
}
private class FileLog{
private Long id;
private String path;
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getPath() {
return path;
}
public void setPath(String path) {
this.path = path;
}
public FileLog(Long id, Stringpath) {
this.id = id;
this.path = path;
}
}
}
packagecn.itcast.net.client;
importjava.io.ByteArrayOutputStream;
importjava.io.File;
importjava.io.InputStream;
importjava.io.OutputStream;
importjava.io.PushbackInputStream;
importjava.io.RandomAccessFile;
importjava.net.Socket;
importcn.itcast.utils.StreamTool;
publicclass SocketClient {
/**
*@param args
*/
public static void main(String[] args) {
try {
// Socketsocket = new Socket("127.0.0.1", 7878);
Socket socket = newSocket("127.0.0.1", 7878);
OutputStream outStream =socket.getOutputStream();
String filename ="QQWubiSetup.exe";
File file = new File(filename);
String head ="Content-Length="+ file.length() + ";filename="+ filename +";sourceid=\r\n";
outStream.write(head.getBytes());
PushbackInputStream inStream = newPushbackInputStream(socket.getInputStream());
String response =StreamTool.readLine(inStream);
System.out.println(response);
String[] items =response.split(";");
String position =items[1].substring(items[1].indexOf("=")+1);
RandomAccessFile fileOutStream= new RandomAccessFile(file, "r");
fileOutStream.seek(Integer.valueOf(position));
byte[] buffer = newbyte[1024];
int len = -1;
int i = 0;
while( (len =fileOutStream.read(buffer)) != -1){
outStream.write(buffer,0, len);
i++;
//if(i==10) break;
}
fileOutStream.close();
outStream.close();
inStream.close();
socket.close();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
*读取流
* @param inStream
* @return字节数组
* @throws Exception
*/
public static byte[]readStream(InputStream inStream) throws Exception{
ByteArrayOutputStreamoutSteam = new ByteArrayOutputStream();
byte[] buffer = newbyte[1024];
int len = -1;
while((len=inStream.read(buffer)) != -1){
outSteam.write(buffer,0, len);
}
outSteam.close();
inStream.close();
returnoutSteam.toByteArray();
}
}
视频上传package cn.itcast.upload;
importjava.io.File;
importjava.io.OutputStream;
importjava.io.PushbackInputStream;
importjava.io.RandomAccessFile;
importjava.net.Socket;
importcn.itcast.service.UploadLogService;
importcn.itcast.utils.StreamTool;
importandroid.app.Activity;
importandroid.os.Bundle;
importandroid.os.Environment;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.view.View;
importandroid.widget.Button;
importandroid.widget.EditText;
importandroid.widget.ProgressBar;
importandroid.widget.TextView;
importandroid.widget.Toast;
publicclass MainActivity extends Activity {
private EditText filenameText;
private TextView resultView;
private ProgressBar uploadbar;
private UploadLogService service;
private Handler handler = new Handler(){
@Override
public void handleMessage(Messagemsg) {
uploadbar.setProgress(msg.getData().getInt("length"));
float num =(float)uploadbar.getProgress() / (float)uploadbar.getMax();
int result = (int)(num *100);
resultView.setText(result +"%");
if(uploadbar.getProgress()== uploadbar.getMax()){
Toast.makeText(MainActivity.this,R.string.success, 1).show();
}
}
};
@Override
public void onCreate(BundlesavedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
service = new UploadLogService(this);
filenameText =(EditText)findViewById(R.id.filename);
resultView =(TextView)findViewById(R.id.result);
uploadbar =(ProgressBar)findViewById(R.id.uploadbar);
Button button =(Button)findViewById(R.id.button);
button.setOnClickListener(newView.OnClickListener() {
@Override
public void onClick(View v){
String filename =filenameText.getText().toString();
if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
File file =new File(Environment.getExternalStorageDirectory(), filename);
if(file.exists()){
uploadbar.setMax((int)file.length());
uploadFile(file);
}else{
Toast.makeText(MainActivity.this,R.string.notexsit, 1).show();
}
}else{
Toast.makeText(MainActivity.this,R.string.sdcarderror, 1).show();
}
}
});
}
private void uploadFile(final File file){
new Thread(new Runnable() {
@Override
public void run() {
try {
Stringsourceid = service.getBindId(file);
Socket socket= new Socket("192.168.1.10", 7878);
OutputStream outStream =socket.getOutputStream();
String head ="Content-Length="+ file.length() + ";filename="+file.getName()
+";sourceid="+(sourceid!=null ? sourceid :"")+"\r\n";
outStream.write(head.getBytes());
PushbackInputStream inStream = newPushbackInputStream(socket.getInputStream());
Stringresponse = StreamTool.readLine(inStream);
String[] items =response.split(";");
StringresponseSourceid = items[0].substring(items[0].indexOf("=")+1);
Stringposition = items[1].substring(items[1].indexOf("=")+1);
if(sourceid==null){//如果是第一次上传文件，在数据库中存在该文件所绑定的资源id
service.save(responseSourceid,file);
}
RandomAccessFilefileOutStream = new RandomAccessFile(file, "r");
fileOutStream.seek(Integer.valueOf(position));
byte[] buffer= new byte[1024];
int len = -1;
int length =Integer.valueOf(position);
while( (len =fileOutStream.read(buffer)) != -1){
outStream.write(buffer,0, len);
length+= len;//累加已经上传的数据长度
Messagemsg = new Message();
msg.getData().putInt("length",length);
handler.sendMessage(msg);
}
if(length ==file.length()) service.delete(file);
fileOutStream.close();
outStream.close();
inStream.close();
socket.close();
} catch (Exception e) {
Toast.makeText(MainActivity.this,R.string.error, 1).show();
}
}
}).start();
}
}
packagecn.itcast.utils;
importjava.io.ByteArrayOutputStream;
importjava.io.File;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.PushbackInputStream;
publicclass StreamTool {
public static void save(File file, byte[]data) throws Exception {
FileOutputStream outStream = newFileOutputStream(file);
outStream.write(data);
outStream.close();
}
public static StringreadLine(PushbackInputStream in) throws IOException {
char buf[] = new char[128];
int room = buf.length;
int offset = 0;
int c;
loop: while (true) {
switch (c =in.read()) {
case -1:
case '\n':
breakloop;
case '\r':
int c2= in.read();
if((c2 != '\n') && (c2 != -1)) in.unread(c2);
breakloop;
default:
if(--room < 0) {
char[]lineBuffer = buf;
buf = new char[offset + 128];
room = buf.length - offset - 1;
System.arraycopy(lineBuffer, 0, buf, 0,offset);
}
buf[offset++]= (char) c;
break;
}
}
if ((c == -1) &&(offset == 0)) return null;
returnString.copyValueOf(buf, 0, offset);
}
/**
*读取流
* @param inStream
* @return字节数组
* @throws Exception
*/
public static byte[]readStream(InputStream inStream) throws Exception{
ByteArrayOutputStreamoutSteam = new ByteArrayOutputStream();
byte[] buffer = newbyte[1024];
int len = -1;
while((len=inStream.read(buffer)) != -1){
outSteam.write(buffer,0, len);
}
outSteam.close();
inStream.close();
returnoutSteam.toByteArray();
}
}
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