标签：拦截器 springboot resp springframework javax 过滤器 import servlet public

配置类

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.asiainfo.group.filter.LoginFilter;
import com.asiainfo.group.interceptor.LoginInterceptor;

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter{
	
	
	@Bean
    public FilterRegistrationBean filterRegist() {
        FilterRegistrationBean frBean = new FilterRegistrationBean();
        
        frBean.setFilter(new LoginFilter());
        frBean.addUrlPatterns("/*");
        
        return frBean;
    }
	
	@Override
	public void addInterceptors(InterceptorRegistry registry) {
		
		registry.addInterceptor(new LoginInterceptor())
			.addPathPatterns("/*")
			.excludePathPatterns("/login")
			.excludePathPatterns("/user_login.html");
	}
	
	
}

拦截器类

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 {
		
		System.err.println("----afterCompletion被调用----");
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
			throws Exception {
		
		System.err.println("----postHandle被调用----");
	}

	@Override
	public boolean preHandle(HttpServletRequest req, HttpServletResponse resp, Object obj) throws Exception {
		
		System.err.println("----preHandle被调用----");
		Object username = req.getSession().getAttribute("username");
		
		if(username==null){
			resp.sendRedirect("/user_login.html");
			return false;
		}
		
		return true;
	}

}

过滤器类

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginFilter implements Filter {
	//定义白名单
	public static final String IGNORE_URL="/login;/user_login.html;";
	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest request=(HttpServletRequest)req;
		HttpServletResponse response=(HttpServletResponse)resp;
		//获取路径
		String path = request.getRequestURI().substring(request.getContextPath().length()).
				replaceAll("[/]+$", "");
		
		//判断是不是js文件，是则不拦截
		if(path.endsWith(".js")){
			chain.doFilter(req, resp);
		}
		//如果白名单包含当前路径，则不拦截
		if(IGNORE_URL.contains(path)){
			chain.doFilter(req, resp);
		}
		
		Object username = request.getSession().getAttribute("username");
		if(username!=null){
			chain.doFilter(req, resp);
		}else{
			response.sendRedirect("/user_login.html");
			return;
		}
		
		
		
		
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}
	
	
}

标签：拦截器,springboot,resp,springframework,javax,过滤器,import,servlet,public
来源： https://blog.51cto.com/u_14643435/2845675

本站声明： 1. iCode9 技术分享网（下文简称本站）提供的所有内容，仅供技术学习、探讨和分享；
2. 关于本站的所有留言、评论、转载及引用，纯属内容发起人的个人观点，与本站观点和立场无关；
3. 关于本站的所有言论和文字，纯属内容发起人的个人观点，与本站观点和立场无关；
4. 本站文章均是网友提供，不完全保证技术分享内容的完整性、准确性、时效性、风险性和版权归属；如您发现该文章侵犯了您的权益，可联系我们第一时间进行删除；
5. 本站为非盈利性的个人网站，所有内容不会用来进行牟利，也不会利用任何形式的广告来间接获益，纯粹是为了广大技术爱好者提供技术内容和技术思想的分享性交流网站。