filter 过滤器

1 普通springboot添加过滤器，可以使用@webFiler注解

2 springsecurity 添加过滤器 需要new 一个filter实例

HttpSecurity http.addFilterAfter(new myFilter(), otherFilter.class);

3 springsecurity oauth2.0 添加过滤器 需要new 一个filter实例

然后再resourceServerConfig中添加HttpSecurity http.addFilterAfter(new myFilter(), otherFilter.class);

4 springmvc 添加过滤器

public class MyFilter implements Filter {
 
	public void destroy() {
		System.out.println("销毁");
	}
 
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		System.out.println("业务代码");
		chain.doFilter(request, response);
	}
 
	public void init(FilterConfig filterConfig) throws ServletException {
		System.out.println("初始化");
	}
 
}

<filter>
      <filter-name>filterName</filter-name>
      <filter-class>xxx.xxx.xxx.MyFilter</filter-class>
  </filter>
  <filter-mapping>
      <filter-name>filterName</filter-name>
      <!-- /*拦截所有请求 -->
      <url-pattern>/*</url-pattern>
  </filter-mapping>