如何在Spring应用程序中使用外部配置?

package hello.example2.Container

import org.springframework.web.bind.annotation.PathVariable
import org.springframework.web.bind.annotation.RequestMapping
import org.springframework.web.bind.annotation.RestController
import org.springframework.web.client.RestTemplate

@RestController
class ContainerController {
    @RequestMapping("/container/{cid}")
    public list(@PathVariable Integer cid) {
        def template = new RestTemplate();
        def container = template.getForObject("http://localhost:5050/container/" + cid.toString(), Container);
        return container;
    }
}

我想用配置选项(例如application.yml或application.properties)替换“http://localhost:5050”。

这是我的应用程序文件(Groovy):
package hello.example2

import groovy.transform.CompileStatic
import org.springframework.boot.SpringApplication
import org.springframework.boot.autoconfigure.EnableAutoConfiguration
import org.springframework.boot.autoconfigure.SpringBootApplication
import org.springframework.context.annotation.Configuration

@SpringBootApplication
@Configuration
@EnableAutoConfiguration
@CompileStatic
class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

我尝试设置“@Configuration”和“@EnableAutoConfiguration”,但说实话我不知道他们在做什么。我是Java/Groovy和Spring框架的新手(但一般来说都不是编程的人)。

我已经阅读了这些页面,但是没有完整的示例片段:

[1] http://docs.spring.io/spring-boot/docs/current/reference/html/howto-properties-and-configuration.html

[2] https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html

最佳答案

在您的配置文件(application.yml或application.properties)中,添加一个新条目:

endpointUrl: http://localhost:5050

然后将该属性注入(inject)您的 Controller 中:
@RestController
class ContainerController {

    @Value("${endpointUrl}")
    private String ednpointUrl;

    @RequestMapping("/container/{cid}")
    public list(@PathVariable Integer cid) {
        def template = new RestTemplate();
        def container = template.getForObject(endpointUrl+"/container/" + cid.toString(), Container);
        return container;
    }
}

09-11 04:50
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