package mm7;import java.io.*;import java.util.Date;import java.text.SimpleDateFormat;public class Logmessage {  private PrintWriter log;  private String logFile = "E://log";  SimpleDateFormat format;  String datatime="";  /**  * 初始化  */  public Logmessage() {    String file="";    String fullpath="";    file="" + (new SimpleDateFormat("yyyy-MM-dd")).format(new Date()) + ".log";    fullpath=logFile + "\\" + file;    format = new SimpleDateFormat("yy-MM-dd HH:mm:ss");    try {      log = new PrintWriter(new FileWriter(fullpath, true), true);    }    catch (IOException e) {      System.err.println("無(wú)法打開(kāi)日志文件: " + fullpath);      log = new PrintWriter(System.err);    }  }  /**  * 將文本信息日志文件  */  public void log(String msg) {    datatime = format.format(new Date())+"";    log.println(datatime + ": " + msg);  }  /**   * 將文本信息與異常寫入日志文件   */  public void log(Throwable e, String msg) {    datatime = format.format(new Date())+"";    log.println(datatime + ": " + msg);    e.printStackTrace(log);  }}