商业源码 JAVA 把文件传到服务器.......
文件上传到A以后 放到服务器上面 然后他就有一个绝对的访问路径 也就是对应一个绝对的url 这样就好办了
Java提供了对URL访问和大量的流操作的的API，可以很容易的完成对网络上资源的存取,下面的代码段就完成了对一个网站的资源进行访问:
destUrl="http://wwwyourwebcom/java/Afilezip";
//假设你把文件放到webroot底下的java文件里面
url = new URL(destUrl);
httpUrl = (HttpURLConnection) urlopenConnection();
//连接指定的网络资源
httpUrlconnect();
//获取网络输入流
bis = new BufferedInputStream(httpUrlgetInputStream());
得到流后下面你自己想怎么操作就怎么操作了
对于怎么得到资源的连接地址这个方法很多 你可以专门提供一个Servlet 获取到输出的流后 Responsewrite转门提供服务器已上传的文件 文件名可以一天位单位返回
客户端用与上面同样的方法得到文件名后 拆分 然后再继续循环调用上面的方法 下载文件就ok了
呵呵 希望可以帮助到你
如果服务器开通了ftp服务，你的客户端可以实现一个ftp的客户端，通过ftp服务将文件上传到服务器的指定目录下，可以使用orgapachecommonsnetftpFTPClient这个类去实现，非常的简单，网上有很多现成的代码可以用
package sockettest;
import javaio;
import javanet;
import javalangThread;
public class Client extends Thread{
private char[] buffer=new char[2048];
private Socket socket=null;
private String localIP="";
private String farIP="";
private int localPort=8765;
private int farPort=0;
private InputStream inKeyboard=Systemin;
private InputStreamReader readKeyboard=new InputStreamReader(inKeyboard);
private BufferedReader getKeyboard=new BufferedReader(readKeyboard); //得到键盘输入的数据
private InputStream in=null;
private FileInputStream inFile=null;
private InputStreamReader inRead=null;
private BufferedReader read=null;
private OutputStream out=null;
private FileOutputStream outFile=null;
private OutputStreamWriter outWrite=null;
private BufferedWriter write=null;
private int timeout=30000;
public void clearBuffer(){
for(int i=0;i<bufferlength;i++)
buffer[i]=0;
}
public Client()throws Exception {
socket=new Socket();
}
public Client(String ip,int port)throws Exception{
socket=new Socket(ip,port);
localIP=socketgetLocalAddress()getHostAddress();
localPort=socketgetLocalPort();
}
public void bind(String ip,int port)throws Exception{ //绑定工作
SocketAddress serverAddr=new InetSocketAddress(ip,port);
socketbind(serverAddr);
localIP=socketgetLocalAddress()getHostAddress();
localPort=socketgetLocalPort();
}
public void setTimeout(int time)throws Exception{
timeout=time;
socketsetSoTimeout(timeout);
}
public void begin()throws Exception{ //开始输入输出的变更封装
in=socketgetInputStream();
inRead=new InputStreamReader(in);
read=new BufferedReader(inRead);
out=socketgetOutputStream();
outWrite=new OutputStreamWriter(out);
write=new BufferedWriter(outWrite);
}
public void writeFromKeyboard()throws Exception{ //使用键盘的输入写到套接字连接 :限制每次128个字节
String s="";
s=getKeyboardreadLine();
writewrite(s);
writeflush();
}
public void writeFromFile(String filePath,long off,int len)throws Exception{ //将文件里的内容写到套接字连接，参数：文件，开始，长度
inFile=new FileInputStream(filePath);
InputStreamReader i=new InputStreamReader(inFile);
BufferedReader r=new BufferedReader(i);
rskip(off);
char[] data=new char[len];
int num=rread(data);
rclose();
writewrite(data,0,num);
writeflush();
}
public String readToPrint()throws Exception{ //读取套接字连接里的内容，显示到屏幕 ：限制1024个字节
clearBuffer();
int num=readread(buffer);
String s=StringvalueOf(buffer,0,num);
return s;
}
public void readToFile(String filePath,boolean on)throws Exception{ //将读取的数据写到套接字连接中 参数：文件名， true(添加)
outFile=new FileOutputStream(filePath,on);
OutputStreamWriter o=new OutputStreamWriter(outFile);
BufferedWriter w=new BufferedWriter(o);
clearBuffer();
int num=readread(buffer);
String s=StringvalueOf(buffer,0,num);
wwrite(s);
wflush();
}
public void closeLink()throws Exception{ //关闭当前套接字连接
socketclose();
}
public String getLocalIP()throws Exception{ //返回本地地址
return localIP;
}
public int getLocalPort()throws Exception{ //返回本地端口
return localPort;
}
public String getFarIP()throws Exception{ //返回远程主机地址
farIP=socketgetInetAddress()getHostAddress();
return farIP;
}
public int getFarPort()throws Exception{ //返回远程主机端口
farPort=socketgetPort();
return farPort;
}
public void setBufferSize(int size){
buffer=new char[size];
}
}
---------------------------------------------------
package sockettest;
import javaio;
import javanet;
import javalangThread;
public class Server extends Thread{
private char[] buffer=new char[2048];
private ServerSocket server=null;
private Socket socket=null;
private String localIP="";
private String farIP="";
private int localPort=8765;
private int farPort=0;
private InputStream inKeyboard=Systemin;
private InputStreamReader readKeyboard=new InputStreamReader(inKeyboard);
private BufferedReader getKeyboard=new BufferedReader(readKeyboard); //得到键盘输入的数据
private InputStream in=null;
private FileInputStream inFile=null;
private InputStreamReader inRead=null;
private BufferedReader read=null;
private OutputStream out=null;
private FileOutputStream outFile=null;
private OutputStreamWriter outWrite=null;
private BufferedWriter write=null;
private int timeout=30000;
public void clearBuffer(){
for(int i=0;i<bufferlength;i++)
buffer[i]=0;
}
public Server(String ip,int port) throws Exception{ //参数：服务器地址 端口
SocketAddress serverAddr=new InetSocketAddress(ip,port);
server=new ServerSocket();
serverbind(serverAddr);
serversetSoTimeout(timeout);
}
public Server()throws Exception{
SocketAddress serverAddr=new InetSocketAddress("127001",8765);
server=new ServerSocket();
serverbind(serverAddr);
serversetSoTimeout(timeout);
}
public void bind(String ip,int port)throws Exception{ //绑定工作
SocketAddress serverAddr=new InetSocketAddress(ip,port);
serverbind(serverAddr);
}
public void accept()throws Exception{ //开始侦听端口
socket= serveraccept();
localIP=socketgetLocalAddress()getHostAddress();
localPort=socketgetLocalPort();
}
public void setTimeout(int time)throws Exception{
timeout=time;
serversetSoTimeout(timeout);
}
public void begin()throws Exception{ //开始输入输出的变更封装
in=socketgetInputStream();
inRead=new InputStreamReader(in);
read=new BufferedReader(inRead);
out=socketgetOutputStream();
outWrite=new OutputStreamWriter(out);
write=new BufferedWriter(outWrite);
}
public void writeFromKeyboard()throws Exception{ //使用键盘的输入写到套接字连接 :限制每次128个字节
String s="";
s=getKeyboardreadLine();
writewrite(s);
writeflush();
}
public void writeFromFile(String filePath,long off,int len)throws Exception{ //将文件里的内容写到套接字连接，参数：文件，开始，长度
inFile=new FileInputStream(filePath);
InputStreamReader i=new InputStreamReader(inFile);
BufferedReader r=new BufferedReader(i);
rskip(off);
char[] data=new char[len];
int num=rread(data);
rclose();
writewrite(data,0,num);
writeflush();
}
public String readToPrint()throws Exception{ //读取套接字连接里的内容，显示到屏幕 ：限制1024个字节
clearBuffer();
int num=readread(buffer);
String s=StringvalueOf(buffer,0,num);
return s;
}
public void readToFile(String filePath,boolean on)throws Exception{ //将读取的数据写到套接字连接中 参数：文件名， true(添加)
outFile=new FileOutputStream(filePath,on);
OutputStreamWriter o=new OutputStreamWriter(outFile);
BufferedWriter w=new BufferedWriter(o);
clearBuffer();
int num=readread(buffer);
String s=StringvalueOf(buffer,0,num);
wwrite(s);
wflush();
}
public void closeLink()throws Exception{ //关闭当前套接字连接
socketclose();
}
public void closeServer()throws Exception{ //关闭套接字服务器
serverclose();
}
public String getLocalIP()throws Exception{ //返回本地地址
return localIP;
}
public int getLocalPort()throws Exception{ //返回本地端口
return localPort;
}
public String getFarIP()throws Exception{ //返回远程主机地址
farIP=socketgetInetAddress()getHostAddress();
return farIP;
}
public int getFarPort()throws Exception{ //返回远程主机端口
farPort=socketgetPort();
return farPort;
}
public void setBufferSize(int size){
buffer=new char[size];
}
}
1，问题引入
在linux下开发的上传模块，在windows下无法运行，提示找不到文件目录或文件
2，原因
主要是因为linux和windows下由于用到了绝对路径，而文件路径间隔符不一样导致的，，
3，解决方法
使用Fileseparator做文件间隔符，
注意：
在java中\t \a \b 等一般都有特别含义，所以文件路径为：
String str = C:\atxt （1）
则如果直接创建文件
File file = new File(str); （2）
则在（1）中就会出错，
所以正确通用的的方法是:
String separator = Fileseparator;
String str1 = "C:"+separator+"atxt"; (或者String str1 = "C:\\atxt)
File file = new File(str1);
同理在linux下也是一样，，，
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