Java基础之IO流，打印异常信息到流（文件）中

import java.io.*;
import java.text.*;
import java.util.*;

class ExceptionInfo
{
    public static void main(String[] args)
    {        
        try
        {
            int[] array = new int[2];
            System.out.println(array[3]);
        }
        catch(Exception e)
        {
            try
            {
                System.setOut(new PrintStream(new File("err.txt")));
                String date = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:S E").format(new Date());
                PrintStream ps = new PrintStream(System.out);
                
                ps.println(date);
            }
            catch(IOException ioe)
            {
                throw new RuntimeException("日志文件创建失败！");
            }
            
            e.printStackTrace(System.out);
        }
    }
}