PrintStream myStream = new PrintStream(System.out) {
@Override
public void println(String x) {
super.println(System.currentTimeMillis() + ": " + x);
}
};
System.setOut(myStream);
System.out.println("Hello World!");
-------------------------------------------------------------------------------
Output:
1420553422337: Hello World!
参考:http://*.com/questions/27800326/hook-into-system-out-println-and-modify