SpringMVC-----实战(登录验证)

一.登录验证

通过restful风格优化对/WEB-INF/page/目录下页面的访问

@Controller
public class DemoController {
	@RequestMapping("{page}")
	public String main(@PathVariable String page) {
		return "/WEB-INF/page/"+page+".jsp";
	}
}

配置视图解析器可简化控制器代码

@Controller
public class DemoController {
	@RequestMapping("{page}")
	public String main(@PathVariable String page) {
		return page;
	}
	
}

配置拦截器-----使所有页面登录了才能进行访问

LoginInterceptor  继承HandlerInterceptor并重写拦截器方法

package com.kennosaur.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class LoginInterceptor implements HandlerInterceptor{

	@Override
	public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
			throws Exception {
		// TODO Auto-generated method stub
		
	}

	@Override
	public boolean preHandle(HttpServletRequest req, HttpServletResponse res, Object arg2) throws Exception {
		String uri = req.getRequestURI();
		if (uri.equals("/SpringMVC03/login")) {
			return true;
		}else {
			Object object = req.getSession().getAttribute("users");
			if (object!=null) {
				return true;
			}
			res.sendRedirect("/SpringMVC03/login.jsp");
			return false;
			
		}
	}

}