下面的代码的执行结果描述正确的是 import javax.servlet.jsp.*; import javax.servlet.jsp.tagext.*; publid class MyTest extends BodyTagSupport { private int num=0; public int doAfterBody() { JspWriter out=bodyContent.getEnclosingWriter(); try{ out.println("good
"); }catch(Exception e){} num++; if(num<2) return EVAL_BODY_AGAIN; else return SKIP_BODY; } }