<% numguess.reset(); %>
Care to <a href="numguess.jsp">try again</a>?
<% } else if (numguess.getNumGuesses() == 0) { %>
Welcome to the Number Guess game.<p>
I'm thinking of a number between 1 and 100.<p>
<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } else { %>
Good guess, but nope. Try <b><%= numguess.getHint() %></b>.
You have made <%= numguess.getNumGuesses() %> guesses.
<p>I'm thinking of a number between 1 and 100.
<p><form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
<% } %>
</font>
</body>
</html>
操作程序(NumberGuessBean.java)
// Number Guess Game
// Written by Jason Hunter, CTO, K&A Software
// jasonh@kasoftware.com, http://www.servlets.com
// Copyright 1999, K&A Software
// Distributed by Sun Microsystems with permission
package num;
import java.util.*;
public class NumberGuessBean {
int answer;
boolean success;
String hint;
int numGuesses;
public NumberGuessBean() {
reset();
}
public void setGuess(String guess) {
numGuesses++;
int g;
try {
g = Integer.parseInt(guess);
}
catch (NumberFormatException e) {
g = -1;
}
if (g == answer) {
success = true;
}
else if (g == -1) {
hint = "a number next time";
}
else if (g < answer) {
hint = "higher";
}
else if (g > answer) {
hint = "lower";
}
}
public boolean getSuccess() {
return success;
}
public String getHint() {
return "" + hint;
}
public int getNumGuesses() {
return numGuesses;
}
public void reset() {
answer = Math.abs(new Random().nextInt() % 100)
+ 1;
success = false;
numGuesses = 0;
}
}
在JSP文件中使用脚本
numguess.jsp是一个非常有趣儿的用脚本写的例子，你看他的结构其实是一个很大的IF……ELSE结构，但是很一个从句又都是用HTML写的，看起来象一个大的程序段。
不过你也不一定非得象numguess.jsp那样用HTML和JSP标签一起来写脚本。在<%和%>标签之间，你可以写任意多行的脚本代码，在通常情况下，尽量少用脚本来处理程序，而尽可能的使用servlets或者Beans，这样你的程序看起来会非常的清析，明了。话又说回来，怎么写JSP还得根据你的习惯和爱好，我不强迫非得使用任何一种方法，SUN的JSP详细说明书不规定脚本的长度。
用标签组合脚本
使用HTML和JSP标签来写脚本的时候，注意前后的标签不要忘记，一定要“封”好。说的不明白，举个例子吧：
<% } else { %> <!-- 用JSP标签的时候先关上 -->
