【使用篇】SpringBoot整合Filter（二）

/**
 * SpringBoot整合Filter方式一
 * 
 * 传统方式
 * <filter>
 *         <filter-name>FirstFilter</filter-name>
 *         <filter-class>com.linhw.demo.filter.FirstFilter</filter-class>
 * </filter>
 * 
 * <filter-mapping>
 *         <filter-name>FirstFilter</filter-name>
 *         <url-pattern>/filter</url-pattern>
 * </filter-mapping>
 */
@WebFilter(filterName="FirstFilter", urlPatterns={"/filter"})
public class FirstFilter implements Filter{
    
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        
    }

    @Override
    public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
            throws IOException, ServletException {
        System.out.println("FirstFilter 进入......");
        arg2.doFilter(arg0, arg1);
        System.out.println("FirstFilter 离开......");
    }
    
    @Override
    public void destroy() {
        
    }

}

@SpringBootApplication
@ServletComponentScan //扫描，并实例化类
public class App3 {
    
    public static void main(String[] args) {
        SpringApplication.run(App3.class, args);
    }

}