java 日志 logging

源码：看注释

package com.jdk14logger;

import java.io.IOException;
import java.util.Date;
import java.util.logging.FileHandler;
import java.util.logging.Formatter;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

public class jdklog {

private static String name = "";
private static Logger log = null;

public static Logger  getLog(String names){
if(log==null){
log=Logger.getLogger(name);
String logPath = "C:/logger.log";//这个是你指定的log文件的路径
FileHandler fileHandler;
try {
fileHandler = new FileHandler(logPath);
fileHandler.setFormatter(new TextFormatter());//新建一个格式类，让它指定
log.setUseParentHandlers(false);
log.addHandler(fileHandler);
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
return log;
}
final static class TextFormatter extends Formatter {

    /**
    * The constructor to use.
    */
    public TextFormatter() {
    }

    /**
    * Formats the given log record's data into human-readable text.
    *
    * @param record The log record whose data needs to be formatted.
    * @return The log record's data as a string.
    */
    public String format(LogRecord record) {
        String level;
        if (record.getLevel() == Level.INFO) {
            level = "INFO";
        } else if (record.getLevel() == Level.ALL) {
            level = "ALL";
        } else if (record.getLevel() == Level.SEVERE) {
            level = "SEVERE";
        } else if (record.getLevel() == Level.WARNING) {
            level = "WARNING";
        } else {
            level = "UNKNOWN";
        }

        //you can build your own result format

        String result ="";
        result += "\n\t" + level + ": " + record.getMessage().replaceAll("\n", "\n\t");
     

        return result;
    }
}





}

调用：Logger log=jdklog.getLog(test.class.getName());
     log.info(需要打印的东西);