| JSP学习笔记(七)-----猜数字游戏 |
| 日期：2006-2-3 20:24:39 人气： [大 中 小] |
1. 这是一个猜数字的游戏，通过使用JSP调用JavaBean 2. 需要两个文件，number.jsp和NumberGuessBean.java 3. 先看number.jsp代码：
<html> <jsp:useBean id="number" class="NumberGuessBean" scope="session" /> <jsp:setProperty name="number" property="*" /> <% if(number.getNumGuesses()==0) { %> <B>Welcome to the Number Guess game.</B> <br> <B>I'm thinking of a number between 1 and 100.</B> <br> <b>What's your guess?</b> <form method=post> <input type=text name="guess"> <input type=submit value=submit> </form> <% } else if(number.getSuccess()) { %> Congratulations! You got it. And after just <%=number.getNumGuesses()%> tries. Care to <a href=number.jsp>try again</a>? <% number.reset(); } else { %> Good guess, but nope. Try <%=number.getHint()%>. You have made <%=number.getNumGuesses()%> guesses. <br>I'm thinking of a number between 1 and 100. <br> What's your guess? <form method=post><input type=text name="guess"> <input type=submit value=submit> </form> <% } %> </html>
4. NumberGuessBean.java代码如下： 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; } }
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| 出处：CnCode转载收集 作者：不详 |
