一个简单的JSP练习

Question

没看明白
不可以直接用<br>吗?

Answer 1

<br>
<%
Properties properties=System.getProperties();
out.println(properties);
%>
<br>

Answer 2

out.println(properties+"<br>");
out.println(properties);

Answer 3

<%
Properties properties=System.getProperties();
out.println(properties);
         out.println("<br>");%>

Answer 4

import java.util.*;public class Test{
public static void main(String[] args){
Properties p=System.getProperties();
ArrayList a=new ArrayList();
HashMap h=new HashMap();
java.util.Enumeration keys=p.keys();
java.util.Collection values=p.values();
java.util.Iterator i=values.iterator();
while(keys.hasMoreElements()&&i.hasNext()){
System.out.print(keys.nextElement()+"\t");
System.out.println(i.next());
}
}
}
改成jsp就ok了

Answer 5

<%@ page contentType="text/html; charset=GB2312" import="java.lang.*,java.util.*"%>
<%
         Properties p=System.getProperties();
         Enumeration keys=p.keys();
java.util.Enumeration keys=p.keys();
Collection values=p.values();
Iterator i=values.iterator();
while(keys.hasMoreElements()&&i.hasNext()){
out.print(keys.nextElement()+"\t");
out.println(i.next());
}%>