过滤器（Filter）的注册方法和 Servlet 一样，有两种方式：代码注册或者注解注册

1.代码注册方式

通过代码方式注入过滤器

@Bean public FilterRegistrationBean indexFilterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(new IndexFilter()); registration.addUrlPatterns("/"); return registration; }

IndexFilter.Java类：

package com.example.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;public class IndexFilter implements Filter{ @Override public void destroy() { System.out.println("filter destroy method"); } @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { System.out.println("filter doFilter method"); } @Override public void init(FilterConfig arg0) throws ServletException { System.out.println("filter init method"); }}

2.注解方式

通过注解方式注入过滤器

IndexFilter2.java类

package com.example.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;@WebFilter(urlPatterns = "/*", filterName = "indexFilter2")public class IndexFilter2 implements Filter{ @Override public void destroy() { System.out.println("filter2 destroy method"); } @Override public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2) throws IOException, ServletException { System.out.println("filter2 doFilter method"); } @Override public void init(FilterConfig arg0) throws ServletException { System.out.println("filter2 init method"); }}

把注解加到入口处启动即可

@SpringBootApplication@ServletComponentScanpublic class SpringBootSimpleApplication { public static void main(String[] args) { SpringApplication.run(SpringBootSimpleApplication.class, args); }}

以上所述是小编给大家介绍的Spring Boot的filter（过滤器）简单使用，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！