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| import java.net.Socket;
import java.net.ServerSocket;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
public class Server extends Thread {
private Connection connection;
private Socket socket;
public Server(Socket sock, Connection conn) {
socket = sock;
connection = conn;
}
public void run() {
java.io.DataInputStream input;
java.io.PrintStream output;
try {
String tmp;
java.util.StringTokenizer tokens;
java.util.Vector albums = new java.util.Vector();
boolean transacting = true;
Statement statement;
ResultSet result_set;
input = new java.io.DataInputStream(socket.getInputStream());
output = new java.io.PrintStream(socket.getOutputStream());
statement = connection.createStatement();
result_set = statement.executeQuery("SELECT album_id, artist, title, "+
&quo t;price " +
& nbsp;"FROM album ");
while( result_set.next() ) {
String id, artist, title, price;
id = result_set.getString(1);
artist = result_set.getString(2);
title = result_set.getString(3);
price = result_set.getString(4);
albums.addElement(id + ":" + artist + ":" + title + ":" + price);
}
output.println(albums.size());
for(int i = 0; i<albums.size(); i++)
output.println((String)albums.elementAt(i));
while( transacting ) {
tmp = input.readLine();
tokens = new java.util.StringTokenizer(tmp);
tmp = tokens.nextToken();
if( tmp.equals("exit") ) {
transacting = false;
}
else if( tmp.equals("purchase") ) {
String credit_card;
String id;
if( tokens.countTokens() != 2 ) {
output.println("error Invalid command");
socket.close();
return;
}
id = tokens.nextToken();
credit_card = tokens.nextToken();
statement = connection.createStatement();
statement.executeUpdate("INSERT INTO purchase (" +
"credit_card, album) " +
"VALUES('" + credit_card + "', '" +
id + "')");
output.println("ok");
}
}
}
catch( Exception e );
finally {
try {
socket.close();
}
catch( java.io.IOException e );
}
}
static public void main(String args[]) {
ServerSocket port_socket;
String driver;
String url;
int port;
if( args.length != 3 ) {
System.err.println("Syntax: java Server <JDBC driver> <JDBC URL> " +
"<port>");
System.exit(-1);
return;
}
driver = args[0];
url = args[1];
try {
port = Integer.parseInt(args[2]);
}
catch( NumberFormatException e ) {
System.err.println("Invalid port number: " + args[2]);
System.exit(-1);
return;
}
try {
port_socket = new ServerSocket(port);
}
catch( java.io.IOException e ) {
System.err.println("Failed to listen to port: " + e.getMessage());
System.exit(-1);
return;
}
while( true ) {
try {
Connection conn;
Server server;
Socket client_sock = port_socket.accept();
conn = java.sql.DriverManager.getConnection(url, "user", "pass");
server = new Server(client_sock, conn);
server.start();
}
catch( java.io.IOException e ) {
System.err.println("Connection failed.");
}
catch( java.sql.SQLException e ) {
System.err.println("Failed to connect to database.");
}
}
}
} |
TCP/IP en Java
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Envoyé par t.n.b.g
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