java IO之PrintStream和PrintWriter

 1 package com.io.test;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.FileNotFoundException;
 5 import java.io.FileOutputStream;
 6 import java.io.FileWriter;
 7 import java.io.IOException;
 8 import java.io.InputStreamReader;
 9 import java.io.PrintStream;
10 import java.io.PrintWriter;
11 import java.util.Date;
12 
13 import org.junit.Test;
14 
15 /**
16  * 打印字节
17  * @author chengjj
18  *
19  */
20 public class TestPrintStreamAndPrinter {
21     @Test
22     public void test() {
23         try {
24             FileOutputStream os = new FileOutputStream("E:/1.txt");
25             PrintStream ps = new PrintStream(os);
26             if (ps != null) {
27                 System.setOut(ps);
28             }
29             int ln = 0;
30             for (char i = 0; i < 65536; i++) {
31                 System.out.print(i + "");
32                 if ((ln ++) % 100 == 0) {
33                     System.out.println();
34                 }
35             }
36         } catch (FileNotFoundException e) {
37             e.printStackTrace();
38         }
39     }
40     
41     @Test
42     public void test1(){
43         try {
44             BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
45             FileWriter writer = new FileWriter("E:/logs.log",true);
46             PrintWriter log = new PrintWriter(writer);
47             String s = reader.readLine();
48             while(s != null){
49                 if(s.equalsIgnoreCase("exit"))
50                     break;
51                 System.out.println(s);
52                 log.println(s);
53                 log.println(new Date());
54                 log.println("-------------------------------------------");
55                 log.flush();//自动带flush功能，不过写上也没有什么
56                 s = reader.readLine();
57             }
58             reader.close();
59             log.close();
60             
61         } catch (IOException e) {
62             e.printStackTrace();
63         }
64         
65         
66     }
67     
68     
69 }