我做了进口
import static java.lang.System.out;
然后我试了
out.println( "test");
但它所做的一切都是一样的
System.out.println("test");
两个在日志中显示, 但不在浏览器中显示
我做了进口
import static java.lang.System.out;
然后我试了
out.println( "test");
但它所做的一切都是一样的
System.out.println("test");
两个在日志中显示, 但不在浏览器中显示
当您在服务器上时, 您必须写下 :
response.getWriter().println("test");
response
注意:
import static java.lang.System.out;
out.println( "test");
等于:
System.out.println("test");
你所做的仅仅是一个" http://docs.oracle.com/javase/1.5.0/docs/guide/ legency/static-import.html" rel=“nofollow” >static import ,它允许你使用 System.out
而不打字 System.
。
如果您想要写入浏览器, 您需要访问 HttpServletResponse 的写作器 :
PrintWriter out = response.getWriter();
// you may pass out to your other classes, so that they write to the browser using
out.println("hello from a class");
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