📄 logmessage.java
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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("无法打开日志文件: " + fullpath); log = new PrintWriter(System.err); } } /** * 将文本信息日志文件 */ public void log(String msg) { datatime = format.format(new Date())+""; log.println(datatime + ": " + msg); } /** * 将文本信息与异常写入日志文件 */ public void log(Throwable e, String msg) { datatime = format.format(new Date())+""; log.println(datatime + ": " + msg); e.printStackTrace(log); }}
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