将参数写在配置文件内是很普遍，这里举例说明yaml类型配置文件List和Map类型参数的配置和注入方法。
1.Gateway
1.1 查看源码
最先是从jar包内的spring.factories查看自动加载的配置：
参数对象类：
@ConfigurationProperties(GatewayProperties.PREFIX) @Validated public class GatewayProperties { public static final String PREFIX = "spring.cloud.gateway"; private final Log logger = LogFactory.getLog(getClass()); @NotNull @Valid private List<RouteDefinition> routes = new ArrayList<>(); private List<FilterDefinition> defaultFilters = new ArrayList<>(); private List<MediaType> streamingMediaTypes = Arrays.asList(MediaType.TEXT_EVENT_STREAM, MediaType.APPLICATION_STREAM_JSON); private boolean failOnRouteDefinitionError = true; }
routes也就是List对象类：
@Validated public class RouteDefinition { private String id; @NotEmpty @Valid private List<PredicateDefinition> predicates = new ArrayList<>(); @Valid private List<FilterDefinition> filters = new ArrayList<>(); @NotNull private URI uri; private Map<String, Object> metadata = new HashMap<>(); private int order = 0; }
yaml里的配置：
spring: cloud: gateway: routes: - id: gateway-service-1 uri: https://www.baidu.com predicates: - Path=/searchBaidu/** filters: - CacheRequestFilter - ValidateCodeFilter - StripPrefix=1 - /authmxl/uklogin - id: gateway-service-2 uri: https://www.google.com predicates: - Path=/searchGoogle/** filters: - CacheRequestFilter - ValidateCodeFilter - StripPrefix=1 - /authmxl/uklogin
1.2 效仿一下
配置类：
@Data @Component @ConfigurationProperties(TranslateConfiguration.PREFIX) public class TranslateConfiguration { public static final String PREFIX = "translate"; private List<TranslateConfig> config= new ArrayList<>(); @Data public static class TranslateConfig { private String type; private int open; private String fromUrl; private String fromPort; private String toUrl; private String toPort; } }
yaml参数：
translate: config: - type: jafka-jafka open: 1 fromUrl: 192.168.0.1 fromPort: 9092 toUrl: 192.168.0.2 toPort: 9092 - type: kafka-jafka open: 0 fromUrl: 192.168.0.2 fromPort: 9092 toUrl: 192.168.0.1 toPort: 9092
2.DynamicDataSource
2.1 查看源码
// 这里只贴出 datasource 也就是 Map 对象 public class DynamicDataSourceProperties { private Map<String, DataSourceProperty> datasource; } // Map 里的 Value 对象 public class DataSourceProperty { private String driverClassName; private String url; private String username; private String password;
yaml配置：
datasource: mysql: driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/test username: root password: root greenplum: driver-class-name: com.pivotal.jdbc.GreenplumDriver url: jdbc:pivotal:greenplum://localhost:5432;DatabaseName=test username: root password: root
2.2 效仿一下
这个跟上边的配置是一样的，Value 对象没有进行封装：
@Data @Component @ConfigurationProperties(prefix = "translate") public class TranslateConfiguration { /** * 转换配置 */ private Map<String, Object> config; }
yaml配置：
translate: config: translateJ2J: type: jafka-jafka open: 1 fromUrl: 192.168.0.207 fromPort: 9092 toUrl: 192.168.0.207 toPort: 9092 translateK2J: type: kafka-jafka open: 0 fromUrl: 192.168.0.207 fromPort: 9092 toUrl: 192.168.0.207 toPort: 9092
3.总结
- 两种方式都能够实现类似的配置，List和Map都可以存放封装对象，而Map多出来一个Key，可以存额外的信息。
- 注意前缀及字段的对应关系。
