黑马程序员 JAVA IO 异常日志 系统信息

public class I_09_IO_MyException {


/**
* @param args
* @throws IOException
*/
public static void main(String[] args) throws IOException {
writerException();


// IO流 系统信息
Properties p = System.getProperties();
// PrintStream ps = new PrintStream("F://system.txt");
PrintWriter pw = new PrintWriter("F://system.txt");
p.list(pw);


pw.flush();
pw.close();


System.out.println("end");
}


/*
* 通过流把异常信息写入文件
*/
private static void writerException() throws FileNotFoundException {
int[] arr = new int[10];
try {
arr[10] = 10;
} catch (ArrayIndexOutOfBoundsException e) {
// TODO Auto-generated catch block
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String info = sdf.format(date);
PrintStream ps = new PrintStream("f://exception.txt");
// ps.write(info.getBytes());
ps.println(info);
e.printStackTrace(ps);

ps.close();
}
}


}