如何在不使用 application.properties 的情况下在 Spring Boot 中创建 db2 连接？

Question

我需要建立一个到 db2 数据库的连接，但是我现在不能使用 application.properties，那么我该如何创建这个连接呢？

Answer 1

You can implement a datasource bean in the app itself. For example:

@Configuration
public class MyClass {

  @Bean
  public DataSource getDataSource() {
    DataSourceBuilder<?> dataSourceBuilder = DataSourceBuilder.create();
    dataSourceBuilder.driverClassName(JDBC_DRIVER_CLASS_NAME);
    dataSourceBuilder.url(myprops.getJDBCUrl());
    dataSourceBuilder.username(myprops.getJDBCUsername());
    dataSourceBuilder.password(myprops.getJDBCPassword());
    return dataSourceBuilder.build();
  }

}

Then, make sure any autowired references to the data source are "lazy", so the app has time to load the properties (maybe from another file) and to instantiate the data source, as in:

  @Lazy
  @Autowired
  private DataSource dataSource;