1 import java.io.FileNotFoundException;
2 import java.io.FileOutputStream;
3 import java.io.PrintStream;
4 /**
5 * printIO流
6 * @author 罗摩衔那
7 *
8 */
9 public class TestPrintStream {
10 public static void main(String[] args) {
11 PrintStream ps=null;
12 try {//输出的目的文件
13 FileOutputStream fos =
14 new FileOutputStream("D:/罗摩衔那/DeskTop/write.txt");
15 ps=new PrintStream(fos);
16 } catch (FileNotFoundException e) {
17 e.printStackTrace();
18 }
19 if(ps !=null)
20 {
21 System.out.println(ps);
22 }
23 int in=0;
24 for(char c=0;c<=60000;c++)
25 {
26 System.out.println(c+" ");
27 if(in++>=100) {System.out.println();in=in-0;}
28 }
29 }
30 }
1 import java.io.BufferedReader;
2 import java.io.FileNotFoundException;
3 import java.io.FileReader;
4 import java.io.IOException;
5 import java.io.PrintStream;
6 /**
7 * printIO流
8 * @author 罗摩衔那
9 *
10 */
11 public class TestPrintStream2 {
12 public static void main(String[] args) {
13 //传入命令行参数
14 String filename=args[0];
15 if(filename!=null) {list(filename,System.out);}
16 }
17
18 public static void list(String filename, PrintStream out) {
19 try {
20 BufferedReader br=
21 new BufferedReader(new FileReader(filename));
22 String s=null;
23 while((s=br.readLine())!=null) {
24 out.println(s);
25 }
26 br.close();
27 } catch (IOException e) {
28
29 out.println("无法读取文件");
30 }
31 }
32 }
1 import java.io.BufferedReader;
2 import java.io.FileWriter;
3 import java.io.IOException;
4 import java.io.InputStreamReader;
5 import java.io.PrintWriter;
6 import java.util.Date;
7 /**
8 * printIO流
9 * @author 罗摩衔那
10 *
11 */
12 public class TestPrintStream3 {
13 public static void main(String[] args) {
14 String s=null;
15 //确定输入源为键盘录入
16 BufferedReader br=new BufferedReader(
17 new InputStreamReader(System.in));
18 try {//输出目的文件
19 FileWriter fw=new FileWriter
20 ("d:/罗摩衔那/DeskTop/PrintStream.txt",true);
21 PrintWriter log=new PrintWriter(fw);
22 while((s=br.readLine())!=null)//读取一行
23 {
24 if(s.equalsIgnoreCase("exit")) break;//退出循环条件
25 System.out.println(s.toUpperCase());//读取到的字母转换为大写
26 log.println("------------");
27 log.print(s.toUpperCase());//信息写入文件中
28 log.flush();//实时写入
29 }
30 log.println("==="+new Date()+"===");
31 log.flush();
32 log.close();
33 }
34 catch (IOException e) {
35
36 e.printStackTrace();
37 }
38 }
39 }
