Java 如何在spring引导应用程序中从YML文件加载多个属性

我们的YML配置如下所示：

datasurces: 
  readDataSource:
    ssl-enabled: false
    driver-class-name: oracle.jdbc.driver.OracleDriver
    host: db1.abc.com
    port: 1232
    sid: ABC_DB
    trust-store-fileName: abcdb.jks
    connection-pool:
      initial-size: 10
      max-size: 20

  writeDataSource:
    ssl-enabled: false
    driver-class-name: oracle.jdbc.driver.OracleDriver
    host: db2.abc.com
    port: 1232
    sid: XYZ_DB
    trust-store-fileName: xyzdb.jks
    connection-pool:
      initial-size: 10
      max-size: 20

@Configuration
@ComponentScan(basePackages = {"com.abc"})
@EnableAspectJAutoProxy(proxyTargetClass = true)
@EnableConfigurationProperties(DataSources.class)
@Profile({"dev"})
public class TestAppConfiguration {

}

@EnableAutoConfiguration
@SpringBootApplication
@EnableConfigurationProperties(DataSources.class)
public class TestAppInitializer {
  @Autowired
  private DataSources dataSources;

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

我们必须将其加载到自定义类

数据源中

@ConfigurationProperties(prefix = "datasources")
public class DataSources {
  @Value("${datasources.readDataSource}")
  private DataSource readDataSource;

  @Value("${datasources.writeDataSource}")
  private DataSource writeDataSource;

  //...getters/setters
}

public class DataSource {
  private String id;
  private boolean sslEnabled;
  private String driverClassName;
  private String host;
  private int port;
  private String trustStoreFileName;
  private ConnectionPool connectionPool;

  //...getters/setters  
}

public class ConnectionPool {
  private int initialSize;
  private int maxSize;

  //...getters/setters 
}

我的spring boot配置文件如下所示：

datasurces: 
  readDataSource:
    ssl-enabled: false
    driver-class-name: oracle.jdbc.driver.OracleDriver
    host: db1.abc.com
    port: 1232
    sid: ABC_DB
    trust-store-fileName: abcdb.jks
    connection-pool:
      initial-size: 10
      max-size: 20

  writeDataSource:
    ssl-enabled: false
    driver-class-name: oracle.jdbc.driver.OracleDriver
    host: db2.abc.com
    port: 1232
    sid: XYZ_DB
    trust-store-fileName: xyzdb.jks
    connection-pool:
      initial-size: 10
      max-size: 20

@Configuration
@ComponentScan(basePackages = {"com.abc"})
@EnableAspectJAutoProxy(proxyTargetClass = true)
@EnableConfigurationProperties(DataSources.class)
@Profile({"dev"})
public class TestAppConfiguration {

}

@EnableAutoConfiguration
@SpringBootApplication
@EnableConfigurationProperties(DataSources.class)
public class TestAppInitializer {
  @Autowired
  private DataSources dataSources;

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

单元测试是：

@SpringApplicationConfiguration(classes = {TestAppInitializer.class})
@Test(groups = "categoryTests")
@ActiveProfiles("dev")
public class DataSourcesTest extends AbstractTestNGSpringContextTests {
  private static final AppLogger logger = LoggerUtil.getLogger(DataSourcesTest.class);

  @Autowired
  private DataSources dataSources;

  @Test
  public void printDetails() {
    logger.debug("DataSources --> {}", dataSources);
  }
}

结果并不像预期的那样

当我从
数据源
类中删除
@Value
时，属性
readDataSource
和
writeDataSource
都为null（数据源

类本身不为null）

当我在

DataSources

类中添加

@Value

时，测试异常失败

原因：java.lang.IllegalStateException:无法将[java.lang.String]类型的值转换为所需类型[com.abc.DataSource]：未找到匹配的编辑器或转换策略

---

如果有人能提供一些解决方法，我将不胜感激。我只想在类中捕获

readDataSource

和

writedasource

，比如

DataSources

用

@ConfigurationProperties

注释你的

数据源

类，然后创建两个

@Bean

用

@ConfigurationProperties

注释的方法

@Configuration
public class DataSources {

    @Bean
    @ConfigurationProperties(prefix="datasources.readDataSource")
    public DataSource readDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties(prefix="datasources.writeDataSource")
    public DataSource writeDataSource() {
        return DataSourceBuilder.create().build();
    }
}

现在有2个数据源，其属性绑定到创建的

DataSource

s。这一机制在Spring Boot参考指南中进行了解释

---

如果您不需要

数据源

，而是构建您自己的对象（尽管不确定为什么需要它？），则同样适用

用

@Configuration

注释

数据源

类，然后创建2个

@Bean

方法，用

@ConfigurationProperties

注释

@Configuration
public class DataSources {

    @Bean
    @ConfigurationProperties(prefix="datasources.readDataSource")
    public DataSource readDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties(prefix="datasources.writeDataSource")
    public DataSource writeDataSource() {
        return DataSourceBuilder.create().build();
    }
}

现在有2个数据源，其属性绑定到创建的

DataSource

s。这一机制在Spring Boot参考指南中进行了解释

如果您不需要

数据源

，而是构建您自己的对象（尽管不确定为什么需要它？），则同样适用