sos:这个例子中bean是怎么工作的

[bitijjz1]

<%@ page import = "num.NumberGuessBean" %>

<jsp:useBean id="numguess" class="num.NumberGuessBean" scope="session"/>
<jsp:setProperty name="numguess" property="*"/>


<% if (numguess.getSuccess()) { %>

<% numguess.reset(); %>

Care to <a href="numguess.jsp">try again</a>?

<% } else if (numguess.getNumGuesses() == 0) { %>


<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>

<% } else { %>

<form method=get>
What's your guess? <input type=text name=guess>
<input type=submit value="Submit">
</form>
__________________________________________________________________________



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;
}
}

[bitijjz1]

明白了

[kingo_liang]

原来不给分

[bitijjz1]

给分,这几天忙里血

[kingo_liang]

jsp:useBean id="numguess" class="num.NumberGuessBean" scope="session"/>
<jsp:setProperty name="numguess" property="*"/>

property="*"的意思就是将表单的值赋给Bean。如果用
<jsp:setProperty name="numguess" property="hint" value="value" />的方法则要每一个变量都要赋值，有<jsp:setProperty name="numguess" property="*"/>就只需一句话就行了！！
希望你能明白！