jsp:useBean(session)

最新推荐文章于 2022-12-03 16:30:52 发布

junjielkj

最新推荐文章于 2022-12-03 16:30:52 发布

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分类专栏： Servlet / JSP 文章标签： JSP Bean Java

本文链接：https://blog.youkuaiyun.com/junjielkj/article/details/83845501

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<%-- *************** SessionBean.jsp **************** --%>


<jsp:useBean id="counterBean"
             scope="session"
             class="bean.CounterBean" />


<%--
<%
bean.CounterBean counterBean = (bean.CounterBean)session.getAttribute("counterBean");
if(counterBean == null) {
	counterBean = new bean.CounterBean();
	session.setAttribute("counterBean", counterBean);
}
%>
--%>
<HTML>
<BODY>
<H3>CounterBean scope="session" Example</H3>
<B>Count:</B> <%= counterBean.getCount() %>
</BODY>
</HTML>

<%-- ************** SessionBean2.jsp **************** --%>
<jsp:useBean id="counterBean"
             scope="session"
             class="bean.CounterBean" />
<HTML>
<BODY>
<H3>CounterBean scope="session" Example</H3>
<B>Count:</B> <%= counterBean.getCount() %>
</BODY>
</HTML>

//=================== CounterBean.java =================
package bean;

import java.io.Serializable;

@SuppressWarnings("serial")
public class CounterBean implements Serializable {
	private int count = 0;

	public CounterBean() {
	}

	public int getCount() {
		count ++;
		return count;
	}

	public void setCount(int count) {
		this.count = count;
	}


}