Spring Cloud Gateway内置过滤器实战——AddRequestParameter过滤器工厂

旧城等待， 2021-07-24 21:24 590阅读 0赞

**一 代码位置**

[https://github.com/cakin24/spring-cloud-code/tree/master/ch17-3/ch17-3-2-gateway][https_github.com_cakin24_spring-cloud-code_tree_master_ch17-3_ch17-3-2-gateway]

[https://github.com/cakin24/spring-cloud-code/tree/master/ch17-3/ch17-3-service][https_github.com_cakin24_spring-cloud-code_tree_master_ch17-3_ch17-3-service]

**二 关键代码**

package cn.springcloud.book.gateway;
    
    
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.cloud.gateway.route.RouteLocator;
    import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder;
    import org.springframework.context.annotation.Bean;
    
    
    @SpringBootApplication
    public class SCGatewayApplication {
    
    
       @Bean
       public RouteLocator testRouteLocator(RouteLocatorBuilder builder) {
          // 关键是下面几行代码
          return builder.routes()
                .route("add_request_parameter_route", r ->
                      r.path("/addRequestParameter").filters(f -> f.addRequestParameter("example", "ValueB"))
                            .uri("http://localhost:8071/test/addRequestParameter"))
                .build();
       }
    
    
       public static void main(String[] args) {
          SpringApplication.run(SCGatewayApplication.class, args);
       }
    }

**三 测试**

1 启动ch17-3-2-gateway

2 启动ch17-3-service

3 浏览器输入  [http://localhost:8080/addRequestParameter][http_localhost_8080_addRequestParameter]

4 页面显示

return addRequestParameter info:ValueB

[https_github.com_cakin24_spring-cloud-code_tree_master_ch17-3_ch17-3-2-gateway]: https://github.com/cakin24/spring-cloud-code/tree/master/ch17-3/ch17-3-1-gateway
[https_github.com_cakin24_spring-cloud-code_tree_master_ch17-3_ch17-3-service]: https://github.com/cakin24/spring-cloud-code/tree/master/ch17-3/ch17-3-service
[http_localhost_8080_addRequestParameter]: http://localhost:8080/addRequestParameter