📄 contextsetattribute.java
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package ServletApi;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ContextSetAttribute extends HttpServlet {
public void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
res.setContentType("text/html;charSet=gb2312");
PrintWriter out = res.getWriter();
out.println("<HTML><TITLE>SetContextAttribute</TITLE><BODY>");
out.println("<H4>ServletContext example - Attribute Setter</H4><HR>");
ServletContext sc = getServletContext();
int calledCount = 0;
if (sc.getAttribute("calledCount") != null) {
Integer tempCount = (Integer)sc.getAttribute("calledCount");
calledCount = tempCount.intValue();
}
out.println("ServletContext,服务器信息: " + sc.getServerInfo() + "<BR>");
out.println("SerlvetContext,真实路径: " + sc.getRealPath("") + "<BR>");
out.println("我们得到的'calledCount'属性: " + calledCount + "<BR>");
calledCount++;
//设置calledcount的值，把它存储在servlet上下文中
sc.setAttribute("calledCount", new Integer(calledCount));
out.println("我们现在要把ServletContext的 'calledCount'属性设成: " + sc.getAttribute("calledCount"));
out.println("</BODY><HTML>");
}
}
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