jsp/bean猜价格小游戏

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jsp和bean实现猜价格的小游戏

通过<jsp:useBean id="" class="" scope="session"> 来设置成session属性使得可以取得上次的值代码如下：

GuestGame.java

package bean;import java.util.Random;public class GuestGame{int answer;int guess;boolean success ;String info;int counter;public GuestGame(){reset();}public int getAnswer() {return answer;}public boolean getSuccess() {return success;}public String getInfo() {return info;}public int getCounter() {return counter;}public void reset(){answer=Math.abs(new Random().nextInt()&1000)+1;success=false;counter=0;}/** * set 和get方法只能出现一个 * 否则会出错的 * @param guess */public void setGuess(String guess){counter++;try{this.guess=Integer.parseInt(guess);}catch(Exception e){this.guess=-1;}if(this.guess==answer){this.success=true;}else if(this.guess==-1){this.info="出错了";}else if(this.guess<answer){this.info="你猜的价格低了";}else if(this.guess>answer){this.info="你猜的价格高了";}if(this.guess>1000){this.info="价格在1000之内";}}}

2.index.jsp

<%@page contentType="text/html;charset=GBK"%><%@page import="bean.GuestGame"%><%%><html><jsp:useBean id="game" class="bean.GuestGame" scope="session"></jsp:useBean><jsp:setProperty name="game" property="*"/><%if(game.getCounter()==0){ %> <form method=get> 输入价格<input type="text" name="guess"> <input type="submit" value="提交"> </form> <% } else if (game.getSuccess()==true) { %> <center>您猜对了！</center><br> <center><a href="index.jsp" mce_href="index.jsp">再猜一次</a></center> <%game.reset(); }else { %> 继续努力，<%=game.getInfo() %><br> 您已经猜了<%=game.getCounter() %>次 <form method=get> 输入价格<input type="text" name="guess"> <input type="submit" value=提交> </form> <% } %></html>

测试通过