logger.java

来自「WebHangman a game can be play on the web」· Java 代码 · 共 60 行

package com.aztsoft.games.util;

import java.io.OutputStream;
import java.io.PrintWriter;

/**
 * Logs messages
 *
 */
class Logger {
    private static final String kEMPTY_STRING = "";
    private PrintWriter writer;
    private String header;
    private boolean outputHeader;

    public Logger() {
    }

    public Logger(OutputStream stream, String headermsg, boolean outputTheHeader) {
        writer = new PrintWriter(stream);
        header = headermsg;
        outputHeader = outputTheHeader;
    }


    public Logger(OutputStream stream, String headermsg) {
        this(stream, headermsg, false);
    }

    public void log(String msg) {
        writer.print(getHeader());
        writer.println(msg);
        writer.flush();
    }

    public void log(String msg, Throwable t) {
        writer.print(getHeader());
        writer.println(msg);
        t.printStackTrace(writer);
        writer.flush();
    }

    public void log(Throwable t) {
        writer.print(getHeader());
        t.printStackTrace(writer);
        writer.flush();
    }

    private String getHeader() {
        if (outputHeader) {
            StringBuffer buf = new StringBuffer("[");
            buf.append(header);
            buf.append(":");
            //buf.append(java.util.Calendar.getInstance().getTime().toString());
            buf.append("] ");
            return buf.toString();
        }
        return kEMPTY_STRING;
    }
}