在spring boot中将Angular环境变量传递给已编译的静态angular文件

import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@RequestMapping("/")
public class AngularController {

    @Value("${angular.environment.variable}")
    private String environmentVariable;

    private final ResourceLoader resourceLoader;

    public AngularController(ResourceLoader resourceLoader) {
        this.resourceLoader = resourceLoader;
    }

    @GetMapping
    @ResponseBody
    public Resource getAngularFile() throws IOException {
        Resource resource = resourceLoader.getResource("classpath:static/angular-file.js");
        String angularFileContent = new String(Files.readAllBytes(resource.getFile().toPath()), StandardCharsets.UTF_8);
        angularFileContent = angularFileContent.replace("{{environmentVariable}}", environmentVariable);
        return new ByteArrayResource(angularFileContent.getBytes());
    }
}