【SpringCloud 技术专题】「Gateway 网关系列」（2）微服务网关服务的 Gateway 功能配置指南分析

spring:  cloud:    gateway:      routes:      - id: server-center  # 唯一标识，通常使用服务id        uri: lb://server-center  # 目标URL，lb代表从注册中心获取服务，lb是Load Balance的缩写        predicates:   # Predicate集合          - Path=/sample/cloud/v1/server-center/**  # 匹配转发路径        # Filter集合        filters:        # 从第几级开始转发          - StripPrefix=4

<dependencies>    <dependency>        <groupId>org.springframework.cloud</groupId>        <artifactId>spring-cloud-starter-gateway</artifactId>    </dependency>    <!-- Nacos Client -->    <dependency>        <groupId>com.alibaba.cloud</groupId>        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>    </dependency>    <!-- actuator -->    <dependency>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-actuator</artifactId>    </dependency>    <dependency>        <groupId>org.springframework.boot</groupId>        <artifactId>spring-boot-starter-test</artifactId>        <scope>test</scope>    </dependency></dependencies>
<dependencyManagement>    <dependencies>        <!--整合Spring Cloud-->        <dependency>            <groupId>org.springframework.cloud</groupId>            <artifactId>spring-cloud-dependencies</artifactId>            <version>Greenwich.SR2</version>            <type>pom</type>            <scope>import</scope>        </dependency>        <!--整合Spring Cloud Alibaba-->        <dependency>            <groupId>com.alibaba.cloud</groupId>            <artifactId>spring-cloud-alibaba-dependencies</artifactId>            <version>2.1.0.RELEASE</version>            <type>pom</type>            <scope>import</scope>        </dependency>    </dependencies></dependencyManagement>

server:  port: 8040spring:  application:    name: gateway  cloud:    nacos:      discovery:        # 指定nacos server的地址        server-addr: 127.0.0.1:8848    gateway:      discovery:        locator:          # gateway通过服务发现组件找到其他的微服务，从而自动转发请求          enabled: true# actuator相关配置management:  endpoints:    web:      exposure:        # 暴露所有监控端点        include: '*'  endpoint:    health:      # 总是显示健康检测详情      show-details: always

${GATEWAY_URL}/{微服务名称}/{接口路径}

spring:  cloud:    gateway:      routes:        - id: test_route  # 路由的唯一标识          uri: http://www.xxx.com          predicates:            # 使用通配符匹配            - Path=/**

spring:  cloud:    gateway:      routes:        - id: test_route  # 路由的唯一标识          uri: http://www.xxx.com/user/order/detail          predicates:            # 指定具体的路径进行匹配            - Path=/user/order/detail

spring:  cloud:    gateway:      routes:        - id: server-center  # 路由唯一标识，这种形式下通常是微服务名称          uri: lb://server-center  # lb代表从注册中心获取服务          predicates:            # 使用通配符匹配            - Path=/**

spring:  cloud:    gateway:      routes:        - id: server-center  # 路由的唯一标识，这种形式下通常是微服务名称          uri: lb://server-center/users/info  # lb代表从注册中心获取服务          predicates:            # 指定具体的路径进行匹配            - Path=/users/info

@Datapublic class TimeBetweenConfig {    /**     * 开始时间     */    private LocalTime start;
    /**     * 结束时间     */    private LocalTime end;}

/** * 路由谓词工厂必须以RoutePredicateFactory结尾， * 这是Spring Cloud Gateway的约定 **/@Slf4j@Componentpublic class TimeBetweenRoutePredicateFactory extends AbstractRoutePredicateFactory<TimeBetweenConfig> {
    public TimeBetweenRoutePredicateFactory() {        super(TimeBetweenConfig.class);    }
    /**     * 实现谓词判断的方法     */    @Override    public Predicate<ServerWebExchange> apply(TimeBetweenConfig config) {        return exchange -> {            LocalTime start = config.getStart();            LocalTime end = config.getEnd();            // 判断当前时间是否为允许访问的时间段内            LocalTime now = LocalTime.now();            return now.isAfter(start) && now.isBefore(end);        };    }
    /**     * 控制配置类（TimeBetweenConfig）属性和配置文件中配置项（TimeBetween）的映射关系     */    @Override    public List<String> shortcutFieldOrder() {        /*         * 例如我们的配置项是：TimeBetween=上午9:00, 下午5:00         * 那么按照顺序，start对应的是上午9:00；end对应的是下午5:00         **/        return Arrays.asList("start", "end");    }}

spring:  cloud:    gateway:      discovery:        locator:          # 禁止gateway通过服务发现组件转发请求到其他的微服务          enabled: false      routes:        - id: server-center          # 目标URL，lb代表从注册中心获取服务          uri: lb://server-center          predicates:            # 注意名称必须为路由谓词工厂类名的前缀，参数为允许访问的时间段            - TimeBetween=上午9:00,下午5:00

org.springframework.format.support.DefaultFormattingConversionService#addDefaultFormatters

org.springframework.format.datetime.standard.DateTimeFormatterRegistrar#registerFormatters