java - 如何为数据库连接创建不同的类

Question

我正在开发一个 spring boot 应用程序，我需要一个通用类来为我提供所有 Controller 的数据库连接，所以我创建了一个单独的类，如下所示:

@RestController
public class DataBaseConnector{


     @Autowired
     @Qualifier("dataSource")
     public static DataSource dataSource;

        @Bean
        @Primary
        @ConfigurationProperties(prefix = "spring.ds")
        public DataSource DataSourcePGStreet() {
            return DataSourceBuilder.create().build();
        }

       @Autowired
       public Connection giveConnection() throws SQLException{
           return dataSource.getConnection();
       }


}

然后在另一个 Controller 中我调用连接如下:

@Autowired
    @Qualifier("dbc")
    private static DataBaseConnector obj;
@Autowired
 private Connection connectionDatabase;

.../// Rest Code
    @RequestMapping(value="/path",produces={MediaType.APPLICATION_JSON_VALUE},method=RequestMethod.GET)
     public ResponseEntity<?> getStreetScore(){


     obj=new DataBaseConnector();
     connectionDatabase=obj.giveConnection();



}

但这会给我一个错误

使用 DataBaseConnector 创建名称时出错。感谢任何帮助

完整堆栈跟踪

描述:

Field dataSource in com.dmmltasmu.controller.DataBaseConnector required a bean of type 'javax.sql.DataSource' that could not be found.
    - Bean method 'dataSource' not loaded because @ConditionalOnClass did not find required class 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType'
    - Bean method 'dataSource' not loaded because @ConditionalOnClass did not find required classes 'javax.transaction.TransactionManager', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType'

Answer 1

您不能 Autowiring 静态字段。丑，但如果你想尝试下面的一个

@Component
public class AnotherController {

private static DataBaseConnectionProvider obj;

@Autowired
public void setDataBaseConnectionProvider(DataBaseConnectionProvider obj) {
    AnotherController.obj = obj;
}}