java - 如何从静态实例的bootstrap.yml文件中获取值

我有一个类 CosmosConnection 和 SupplierGetResponseFeed

我正在从 SupplierGetResponseFeed

调用 CosmosConnection 的方法

我从中调用 CosmosConnection 方法的 SupplierGetResponseFeed 方法是静态

示例:public static SupplierResponseDataEntity prepareSupplierAzureData(Map<String, Object> row, String[] columnNames) {

因此，当我在 SupplierGetResponseFeed 中创建 CosmosConnection 对象时，由于无法从中的bootstrap.yml文件中选择值，所以我无法使用@Autowired。CosmosConnection

尽管我在 Supplier @ ResponseFeed 中使用@Autowired创建对象，但我无法从引导程序中选择值

@自动连线
静态CosmosConnection宇宙；

以下是供应商GetResponseFeed 的代码

public class SupplierGetResponseFeed {
static CosmosConnection cosmos= new CosmosConnection(); //creating object
public static SupplierResponseDataEntity prepareSupplierAzureData(Map<String, Object> row, String[] columnNames) {
//Some code
cosmos.connectToDB(); //calling the method of CosmosConnection class
}

的代码为 CosmosConnection

@Configuration
@ComponentScan
public class CosmosConnection {
    @Value("${cosmos.connectionuri}") private String uri;
    @Value("${cosmos.primarykey}") private String primarykey;

public String connectToDB() throws DocumentClientException, IOException, ParseException {
    System.out.println("URI is " + uri); //getting this as null

我需要做些什么更改才能从bootstrap.yml中选择值？

最佳答案

带有spring框架的javax.annotation包中的一个名为PostConstruct的注释可用于解决该问题。如源代码中所述:

The PostConstruct annotation is used on a method that needs to be executed
 after dependency injection is done to perform any initialization

下面的代码是一个示例:

@Configuration
public class ComosConfig {
  @Value("${cosmos.connectionuri}") private String uri;
  @Value("${cosmos.primarykey}") private String primarykey;

  //get and set methods here
}

public class CosmosConnection {
  private String uri;
  private String primaryKey;

  public CosmosConnection(String uri, String primaryKey) {
    this.uri = uri;
    this.primaryKey = primaryKey;
  }

  public String connectToDB() {
    //do something here
  }
}

@Component
public class SupplierGetResponseFeed {
  private static CosmosConnection cosmos;
  private CosmosConfig config;

  public SupplierGetResponseFeed(CosmosConfig config) {
    this.config = config;
  }

  @PostConstruct
  public void init() {
    String uri = config.getUri();
    String primaryKey = config.getprimaryKey();
    cosmos = new cosmos(uri, primaryKey);
  }

  public static SupplierResponseDataEntity prepareSupplierAzureData() {
    cosmos.connectToDB(); //calling the method of CosmosConnection class
  }
}

毕竟，鉴于代码分析实用程序不建议从实例方法写入静态，因此建议您将init方法与抑制警告注释一起使用以消除警告。