login.java

这个是jsp编写的考试系统代码

package kaoshi.monitor.action;

import java.io.*;
import java.util.Properties;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;

public class Login extends Action {
	
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception
    {
        String monitor = request.getParameter("monitor");
        String key = request.getParameter("key");
        
        HttpSession session = request.getSession();
        ServletContext application = session.getServletContext();
		String filePath = application.getRealPath("/WEB-INF/monitorPassword.txt");
		Properties account = new Properties();
		account.load(new FileInputStream(filePath));
		
		boolean pass = false;
		String pw = account.getProperty(monitor);
		if (pw != null) {
			if (pw.equals(key)) {
				pass = true;
			}
		}
		
		String next = null;
		if (pass) {
			next = "success";
			session.setAttribute("monitor", monitor);
		} else {
			next = "failure";
			session.invalidate();
			request.setAttribute("errorMessage", "Login failed!");
		}
        
        return mapping.findForward(next);
    }
    
}