SpringCloud (version=2021.0.1)中說Eureka 默認是使用RestTemplate的，但我在使用時，發現每次啟動都是Jersey.
在源码中可以看到，RestTemplate DiscoveryClient的Bean配置如下
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| @Bean
@ConditionalOnClass(name = "org.springframework.web.client.RestTemplate")
@ConditionalOnMissingClass("com.sun.jersey.api.client.filter.ClientFilter")
@ConditionalOnMissingBean(value = { AbstractDiscoveryClientOptionalArgs.class }, search = SearchStrategy.CURRENT)
@ConditionalOnProperty(prefix = "eureka.client", name = "webclient.enabled", matchIfMissing = true,
havingValue = "false")
public RestTemplateDiscoveryClientOptionalArgs restTemplateDiscoveryClientOptionalArgs(TlsProperties tlsProperties,
EurekaClientHttpRequestFactorySupplier eurekaClientHttpRequestFactorySupplier)
throws GeneralSecurityException, IOException {
logger.info("Eureka HTTP Client uses RestTemplate.");
RestTemplateDiscoveryClientOptionalArgs result = new RestTemplateDiscoveryClientOptionalArgs(
eurekaClientHttpRequestFactorySupplier);
setupTLS(result, tlsProperties);
return result;
}
@Bean
@ConditionalOnClass(name = "com.sun.jersey.api.client.filter.ClientFilter")
@ConditionalOnMissingBean(value = AbstractDiscoveryClientOptionalArgs.class, search = SearchStrategy.CURRENT)
public MutableDiscoveryClientOptionalArgs discoveryClientOptionalArgs(TlsProperties tlsProperties)
throws GeneralSecurityException, IOException {
logger.info("Eureka HTTP Client uses Jersey");
MutableDiscoveryClientOptionalArgs result = new MutableDiscoveryClientOptionalArgs();
setupTLS(result, tlsProperties);
return result;
}
```
因此，我在POM中需要加上 spring-boot-starter-web
```XML
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
|
同时，还需要exclude Jersey.
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| <dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
<exclusions>
<exclusion>
<artifactId>jersey-client</artifactId>
<groupId>com.sun.jersey</groupId>
</exclusion>
</exclusions>
</dependency>
|
如果要使用Jersey，则需要引入Jersey相关包
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| <dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>3.0.4</version>
</dependency>
<dependency>
<groupId>com.sun.jersey.contribs</groupId>
<artifactId>jersey-apache-client4</artifactId>
<version>1.19.4</version>
</dependency>
|