目的：修改某些接口请求头相关参数，调用第三方服务

优点：配置简单，适合接口配置数量较少的情况，不影响其他接口。

缺点：若接口配置数量多且前缀不一致，配置麻烦易出错。

1、设置过滤器配置

import 包路径.AuthHeaderIgnoreFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class FilterConfig {
    @Bean
    public FilterRegistrationBean modifyParametersFilter() {
        FilterRegistrationBean registration = new FilterRegistrationBean(); 
        registration.setFilter(new AuthHeaderIgnoreFilter());
        registration.addUrlPatterns(
// 接口地址
              "/XXX/xxx/*",
            "/XXX/xxx/*");
        registration.setName("authHeaderIgnoreFilter");
        registration.setOrder(1);
        return registration; 
    }
}

2、 配置具体业务

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.IOException;

@WebFilter
public class AuthHeaderIgnoreFilter implements Filter {
//    @Override
//    public void init(FilterConfig filterConfig) throws ServletException { }
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
    {
        HttpServletRequestWrapper requestWrapper = new
        HttpServletRequestWrapper((HttpServletRequest) request) {
         /**
          *  此处为具体业务
          *  示例：若请求头为Authorization或token，则置为123，否则不变
          * @param name
          * @return
          */
         @Override
            public String getHeader(String name) {
                String superHeader = super.getHeader(name);
                if("Authorization".equals(name) || "token".equals(name)){
                   return "123";
                }
                return superHeader; 
            }
        };
        chain.doFilter(requestWrapper,response); 
    }

    @Override
    public void destroy() { }
}