相关疑难解决方法(0)

我有一个非常简单的Spring Boot应用程序,我正在尝试使用一些外部化配置.我试图按照弹簧启动文档中的信息,但我正在遇到路障.

当我运行app.properties文件中的外部配置下面的应用程序时,不会填充bean中的变量.我确定我做的事情很愚蠢,谢谢你的任何建议.

MyBean.java(位于/ src/main/java/foo/bar /)

package foo.bar;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.stereotype.Component;

@Component
public class MyBean {

    @Value("${some.prop}")
    private String prop;

    public MyBean() {
        System.out.println("================== " + prop + "================== ");
    }
}

Application.java(位于/ src/main/java/foo /)

package foo;

import foo.bar.MyBean;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.SpringApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;

@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application {

    @Autowired
    private MyBean myBean;

    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    } …

语境：

我使用@Scheduled注释处理报告，并且当Component从Service属性调用时未使用@Value即使它物理存在于.properties并在 中打印出来，@PostConstruct。

描述：

ReportProcessor接口及InventoryReportProcessor实现：

@FunctionalInterface
interface ReportProcessor {
    public void process(OutputStream outputStream);
}

@Component
public class InventoryReportProcessor implement ReportProcessor {

    @Value("${reportGenerator.path}")
    private String destinationFileToSave;

    /*
    @PostConstruct
    public void init() {
        System.out.println(destinationFileToSave);
    }
    */

    @Override
    public Map<String, Long> process(ByteArrayOutputStream outputStream) throws IOException {
        System.out.println(destinationFileToSave);

        // Some data processing in here
        return null;
    }
}

我用它从

@Service
public class ReportService {
    @Value("${mws.appVersion}")
    private String appVersion;

    /* …