SpringBoot----整合 Filter

一.通过注解扫描完成 Filter 组件的注册

1.1 编写 Filter  

package com.bjsxt.filter; 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.annotation.WebFilter; /** *SpringBoot整合Filter 方式一 *<filter> * <filter-name>FirstFilter</filter-name> * <filter-class>com.bjsxt.filter.FirstFilter</filter-class> *</filter> *<filter-mapping> * <filter-name>FirstFilter</filter-name> * <url-pattern>/first</url-pattern> *</filter-mapping> */ //@WebFilter(filterName="FirstFilter",urlPatterns={"*.do","*.jsp"}) @WebFilter(filterName="FirstFilter",urlPatterns="/first") public class FirstFilter implements Filter { @Override public void destroy() { // TODO Auto-generated method stub } @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { System.out.println("进入Filter"); arg2.doFilter(arg0, arg1); System.out.println("离开Filter"); } @Override public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } }

1.2 编写启动类

package com.bjsxt; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.ServletComponentScan; /** *SpringBoot整合Filter 方式一 * */ @SpringBootApplication @ServletComponentScan public class App { public static void main(String[] args) { SpringApplication.run(App.class, args); } }

二.通过方法完成 Filter 组件的注册

2.1 编写 Filter

package com.bjsxt.filter; 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; /** * *SpringBoot整合Filter 方式二 * */ public class SecondFilter implements Filter { @Override public void destroy() { // TODO Auto-generated method stub } @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { System.out.println("进入SecondFilter"); arg2.doFilter(arg0, arg1); System.out.println("离开SecondFilter"); } @Override public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub } }

2.2 编写启动类

package com.bjsxt; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.boot.web.servlet.FilterRegistrationBean; import org.springframework.boot.web.servlet.ServletRegistrationBean; import org.springframework.context.annotation.Bean; import com.bjsxt.filter.SecondFilter; import com.bjsxt.servlet.SecondServlet; /** * SpringBoot整合Filter方式二 * * */ @SpringBootApplication public class App2 { public static void main(String[] args) { SpringApplication.run(App2.class, args); } /** * 注册Servlet * @return */ @Bean public ServletRegistrationBean getServletRegistrationBean(){ ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet()); bean.addUrlMappings("/second"); return bean; } /** * 注册Filter */ @Bean public FilterRegistrationBean getFilterRegistrationBean(){ FilterRegistrationBean bean = new FilterRegistrationBean(new SecondFilter()); //bean.addUrlPatterns(new String[]{"*.do","*.jsp"}); bean.addUrlPatterns("/second"); return bean; } }