Spring Boot的filter（过滤器）简单使用实例详解

2019-11-26 12:29:52

字体：大中小

来源：转载

供稿：网友

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武林网网站的支持！

上一篇：Spring Boot的listener(监听器)简单使用实例详解

下一篇：Spring Boot的Controller控制层和页面