模型上的Java Spring Batch Embedded字段始终为null

Question

I'm having issues where the JdbcPagingItemReader can't pull in the values for fields that have been annotated with @Embedded.

For example:

@Entity
@Data
class Clothing {
  String name;

  @Embedded 
  Cost total;
}

During the batch job, the name will be correct, but the total is always null. How can I fix this?

Answer 1

The JdbcPagingItemReader knows nothing about JPA mappings. It requires a RowMapper in order to map items to your domain type Clothing .

What you need to use is rather the JpaPagingItemReader which knows about @Entity annotated classes and how to map them to items.