求教！用Servlet编写计数器问题！！！！急啊个位大哥！！！
代码如下
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class Servlet1 extends HttpServlet {
public Servlet1() {
try {
jbInit();
} catch (Exception ex) {
ex.printStackTrace();
}
}
private static final String CONTENT_TYPE = "text/html; charset=GBK ";
//Initialize global variables
public void init() throws ServletException {
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
int i=0;
Integer num=new Integer(0);
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
ServletContext context=this.getServletContext();
num=(Integer)context.getAttribute( "count ");
if(num==null)
{
i=1;
num=new Integer(1);
}
else
{
i=num.intValue()+1;
num=new Integer(num.intValue()+1);
}
context.setAttribute( "count ",num);
out.println( " <html> ");
out.println( " <head> <title> Servlet1 </title> </head> ");
out.println( " <body bgcolor=\ "#ffffff\ "> ");
out.println( " <p> 您已经访问了 "+i+ "次 </p> ");
out.println( " </body> ");
out.println( " </html> ");
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse response) throws
ServletException, IOException {
doGet(request, response);
}
//Clean up resources
public void destroy() {
}
private void jbInit() throws Exception {
}
}
JB2005编译后在WEB VIEW显示URL: Unable to open location: Socket is not connected: connect
急啊！！请个位大哥务必教我要哭出来了
[解决办法]
lz的代码在我的机器上运行没有问题。(eclipse3.2+tomcat5.5.23+jdk1.5)
输出：您已经访问了1次
不过这个计数器不是防刷新的。
[解决办法]
计数器用Listener作吧
[解决办法]
看提示啊，端口没有连接。不是代码问题啊，我这里也可以正常运行的。
请教下，XML里加上count字段的格式具体是怎么样的？忘记了，汗。
[解决办法]
直接用九大对象里面的Application对象不也可以实现吗？
Application .....javax.servlet.servletContext 你去看看
计数器
<%
int a= 0;
if(application.getAttribute( "count ")==null){
application.setAttribute( "count ";new Integer(a));
}
else{
int aa = Integer.parseInt(application.getAttribute( "count ").toString())+1;
application.setAttribute( "count ",new Integer(aa));
}
out.println( "您是 "+application.getAttribute( "count ")+ "位访问者！ ");
%>
[解决办法]
直接用九大对象里面的Application对象不也可以实现吗？
Application .....javax.servlet.servletContext 你去看看
计数器
<%
int a= 0;
if(application.getAttribute( "count ")==null){
application.setAttribute( "count ";new Integer(a));
}
else{
int aa = Integer.parseInt(application.getAttribute( "count ").toString())+1;
application.setAttribute( "count ",new Integer(aa));
}
out.println( "您是 "+application.getAttribute( "count ")+ "位访问者！ ");
%>
完全同意.这个是最简单的.
但也有一个小问题.就是重新启支TOMCAT之后.就得重新再来一次了
