输入输出重定向.txt

import java.io.OutputStream;
import java.io.PrintStream;
 
 
public class TestSetIO {
 
/**
 * Ìí¼Ó×¢ÊÍ
 *
 * Returns ·µ»ØÃèÊö
 */
public static void main(String[] args) {
 
PrintStream ps = System.out;
TestSetIO setIO = new TestSetIO();
PrintStream out = new FakePrintStream(System.out);
System.setOut(out);
setIO.printMethod();
String tmpStr = ((FakePrintStream)out).getStr();
System.setOut(ps);
System.out.println("FakePrintStream : " + tmpStr);
}
private void printMethod() {
System.out.println(" in printMethod ");
}
 
}
 
class FakePrintStream extends PrintStream{
private StringBuilder str = new StringBuilder();
public FakePrintStream(OutputStream out){
super(out);
}
@Override
public void write(byte buf[], int off, int len){
str.append(new String(buf, off, len));
}
public String getStr(){
return str.toString();
}
}

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