My JSP file does not reflec the change of a Bean
My test environment: Win 2000, JDK 1.3.1, OC4J(standalone)
My problem:
In servlet, the change of a Strng value is reflected at the next refresh of a browser.
But, when a jsp file call a bean's getXXX(return a String value) method, and if the String value of that bean is changed, the next refresh or visit to that jsp file does not reflect the change of that bean.
For example:
1) TestClass.java
public class TestClass {
private String txt;
public class TestClass {
txt = "Test"; ----- (g
public String getTxt() {
return txt;
2) test.jsp
<html><body>
<h2>
<% TestClass test = new TestClass(); --(h
out.print(test.getTxt()); %> --(i
</h2>
</body></html>
In my first vistit to "http://localhost:8888/test.jsp" the brower shows "Test" String, but after I change the txt value to "Test1"((g) the brower does not reflect the change.
I found that if I use <jsp:useBean id="test" class="TestClass" /> instead of (h-(i line, the brower reflects the change of the bean.
Why does this occur?
Thaks in advance.
PS) In some cases(Not above example), I get the java.lang.ClassCastException.
So Each time I change a Servlet or a Bean, I restart OC4J.
null
SangKyu,
<jsp:useBean > has a property called scope, which defaults to "page".
So the bean gets reset everytime you reload the page.
Can I suggest that you set it to "session"?
The following syntax card I have found userful:
http://java.sun.com/products/jsp/syntax.pdf
Cheers,
Scott
Atlassian - Supporting YOUR 'Orion/OC4J' World
http://www.atlassian.com - [EMAIL][email protected][EMAIL]
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