userservlet.java

使用JSP+Servlet+Ajax的供应商管理系统（不包含数据库部分）

package com.aowin.scm.servlet;

import com.aowin.scm.dao.UserDAO;
import com.aowin.scm.util.BaseServlet;
import com.aowin.scm.util.Constant;

public class UserServlet extends BaseServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	@Override
	protected void doBusiness() {
String method = request.getParameter("method");
        
        if ("logon".equalsIgnoreCase(method)) {
            doLogon();
        } else if ("logout".equalsIgnoreCase(method)) {
            doLogout();
        }
		
	}
	protected void doLogon() {
        String name = request.getParameter("name");
        String password = request.getParameter("password");
        //判断用户是否存在
        boolean login = new UserDAO().check(name, password);
        if (login) {
            forward(Constant.WELCOME_PAGE);
        } else {
        	redirect(Constant.LOGIN_PAGE);
        }
    }
    
    protected void doLogout() {
        request.getSession().invalidate();
        forward(Constant.INDEX_PAGE);
    }
	

}