1. 
   
2. <P>import java.util.*;
   
3. import java.io.*;
   
4. public class Temp{
   
5. public static void main(String[] args){
   
6. System.out.println("执行Temp");
   
7. File file=new File("hehe.txt");
   
8. try {
   
9. System.setOut(new PrintStream(
   
10. new BufferedOutputStream(
    
11. new FileOutputStream("hehe.txt"))));
    
12. } catch (FileNotFoundException e) {
    
13. // TODO Auto-generated catch block
    
14. e.printStackTrace();
    
15. }
    
16. System.out.println("abc");
    
17. System.out.flush();
    
18. }
    
19. }
    
20. import java.io.*;
    
21. public class Test{
    
22. public static void command(String command){
    
23. try{
    
24. Process process=new ProcessBuilder(command.split(" ")).
    
25. start();
    
26. System.out.println(process);
    
27. PrintWriter out=new PrintWriter(
    
28. new OutputStreamWriter(
    
29. process.getOutputStream()));
    
30. out.println("def");
    
31. 
    
32. out.flush();
    
33. }catch(IOException e){e.printStackTrace();}
    
34. }
    
35. public static void main(String[] args){
    
36. Test.command("java Temp");
    
37. }
    
38. 
    
39. }</P>

复制代码

我想在Test中启动Temp,获得Temp重定向过的out,就是文件“hehe.txt”,然后在Test中继续往文件写入，为什么Temp没有执行？

1. 
   
2. <P>import java.util.*;
   
3. import java.io.*;
   
4. public class Temp{
   
5. public static void main(String[] args){
   
6. System.out.println("执行Temp");
   
7. File file=new File("hehe.txt");
   
8. try {
   
9. System.setOut(new PrintStream(
   
10. new BufferedOutputStream(
    
11. new FileOutputStream("hehe.txt"))));
    
12. } catch (FileNotFoundException e) {
    
13. // TODO Auto-generated catch block
    
14. e.printStackTrace();
    
15. }
    
16. System.out.println("abc");
    
17. System.out.flush();
    
18. }
    
19. }
    
20. import java.io.*;
    
21. public class Test{
    
22. public static void command(String command){
    
23. try{
    
24. Process process=new ProcessBuilder(command.split(" ")).
    
25. start();
    
26. System.out.println(process);
    
27. PrintWriter out=new PrintWriter(
    
28. new OutputStreamWriter(
    
29. process.getOutputStream()));
    
30. out.println("def");
    
31. 
    
32. out.flush();
    
33. }catch(IOException e){e.printStackTrace();}
    
34. }
    
35. public static void main(String[] args){
    
36. Test.command("java Temp");
    
37. }
    
38. 
    
39. }</P>

复制代码

我想在Test中启动Temp,获得Temp重定向过的out,就是文件“hehe.txt”,然后在Test中继续往文件写入，为什么Temp没有执行？