1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | package log4j ; import java.io.* ; import java.net.* ; // add for log4j: import some package import org.apache.log4j.PropertyConfigurator ; import org.apache.log4j.Logger ; import org.apache.log4j.Level ; /** * * <p> Client With Log4j </p> * <p> Description: a sample with log4j</p> * @version 1.0 */ public class ClientWithLog4j { /* add for log4j: class Logger is the central class in the log4j package. we can do most logging operations by Logger except configuration. getLogger(...): retrieve a logger by name, if not then create for it. */ static Logger logger = Logger.getLogger ( ClientWithLog4j.class.getName () ) ; /** * * @param args : configuration file name */ public static void main ( String args [] ) { String welcome = null ; String response = null ; BufferedReader reader = null ; PrintWriter writer = null ; InputStream in = null ; OutputStream out = null ; Socket client = null ; /* add for log4j: class BasicConfigurator can quickly configure the package. print the information to console. */ PropertyConfigurator.configure ( "ClientWithLog4j.properties" ) ; // add for log4j: set the level // logger.setLevel ( ( Level ) Level.DEBUG ) ; try{ client = new Socket( "localhost" , 8001 ) ; // add for log4j: log a message with the info level logger.info ( "Client socket: " + client ) ; in = client.getInputStream () ; out = client.getOutputStream () ; } catch ( IOException e ) { // add for log4j: log a message with the error level logger.error ( "IOException : " + e ) ; System.exit ( 0 ) ; } try{ reader = new BufferedReader ( new InputStreamReader ( in ) ) ; writer = new PrintWriter ( new OutputStreamWriter ( out ), true ) ; welcome = reader.readLine () ; // add for log4j: log a message with the debug level logger.debug ( "Server says: '" + welcome + "'" ) ; // add for log4j: log a message with the debug level logger.debug ( "HELLO" ) ; writer.println ( "HELLO" ) ; response = reader.readLine () ; // add for log4j: log a message with the debug level logger.debug ( "Server responds: '" + response + "'" ) ; // add for log4j: log a message with the debug level logger.debug ( "HELP" ) ; writer.println ( "HELP" ) ; response = reader.readLine () ; // add for log4j: log a message with the debug level logger.debug ( "Server responds: '" + response + "'") ; // add for log4j: log a message with the debug level logger.debug ( "QUIT" ) ; writer.println ( "QUIT" ) ; } catch ( IOException e ) { // add for log4j: log a message with the warn level logger.warn ( "IOException in client.in.readln()" ) ; System.out.println ( e ) ; } try { Thread.sleep ( 2000 ) ; } catch ( Exception ignored ) {} } } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 | package log4j; import java.util.* ; import java.io.* ; import java.net.* ; // add for log4j: import some package import org.apache.log4j.PropertyConfigurator ; import org.apache.log4j.Logger ; import org.apache.log4j.Level ; /** * * <p> Server With Log4j </p> * <p> Description: a sample with log4j</p> * @version 1.0 */ public class ServerWithLog4j { final static int SERVER_PORT = 8001 ; // this server's port /* add for log4j: class Logger is the central class in the log4j package. we can do most logging operations by Logger except configuration. getLogger(...): retrieve a logger by name, if not then create for it. */ static Logger logger = Logger.getLogger ( ServerWithLog4j.class.getName () ) ; /** * * @param args */ public static void main ( String args[]) { String clientRequest = null ; BufferedReader reader = null ; PrintWriter writer = null ; ServerSocket server = null ; Socket socket = null ; InputStream in = null ; OutputStream out = null ; /* add for log4j: class BasicConfigurator can quickly configure the package. print the information to console. */ PropertyConfigurator.configure ( "ServerWithLog4j.properties" ) ; // add for log4j: set the level // logger.setLevel ( ( Level ) Level.DEBUG ) ; try{ server = new ServerSocket ( SERVER_PORT ) ; // add for log4j: log a message with the info level logger.info ( "ServerSocket before accept: " + server ) ; // add for log4j: log a message with the info level logger.info ( "Java server with log4j, on-line!" ) ; // wait for client's connection socket = server.accept() ; // add for log4j: log a message with the info level logger.info ( "ServerSocket after accept: " + server ) ; in = socket.getInputStream() ; out = socket.getOutputStream() ; } catch ( IOException e ) { // add for log4j: log a message with the error level logger.error ( "Server constructor IOException: " + e ) ; System.exit ( 0 ) ; } reader = new BufferedReader ( new InputStreamReader ( in ) ) ; writer = new PrintWriter ( new OutputStreamWriter ( out ), true ) ; // send welcome string to client writer.println ( "Java server with log4j, " + new Date () ) ; while ( true ) { try { // read from client clientRequest = reader.readLine () ; // add for log4j: log a message with the debug level logger.debug ( "Client says: " + clientRequest ) ; if ( clientRequest.startsWith ( "HELP" ) ) { // add for log4j: log a message with the debug level logger.debug ( "OK!" ) ; writer.println ( "Vocabulary: HELP QUIT" ) ; } else { if ( clientRequest.startsWith ( "QUIT" ) ) { // add for log4j: log a message with the debug level logger.debug ( "OK!" ) ; System.exit ( 0 ) ; } else { // add for log4j: log a message with the warn level logger.warn ( "Command '" + clientRequest + "' not understood." ) ; writer.println ( "Command '" + clientRequest + "' not understood." ) ; } } } catch ( IOException e ) { // add for log4j: log a message with the error level logger.error( "IOException in Server " + e ) ; System.exit ( 0 ) ; } } } } 2.2.3. 配置文件 2.2.3.1. 客户程序配置文件
2.2.3.2. 服务器程序配置文件
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