java System.out.println 输出重定向到文件中
import java.io.FileOutputStream; import java.io.PrintStream; import java.util.Date; public class SystemOutTest { public static void main(String[] args) throws Exception { String property = System.getProperties().getProperty("user.home"); String filePath = property.replace("\\", "/"); String fileName = filePath + "/out.txt"; try { System.setOut(new PrintStream(new FileOutputStream(fileName))); while (true) { Thread.sleep(5000); System.out.println(new Date()); } } catch (Exception e) { e.printStackTrace(); } } }