Question

我想根据2个不同的来源统一（合并）项目（平面文件和数据库）。我如何使用Spring Batch ItemReader执行该操作？

public class User {
    Long id;
    String firstName;
    String lastName;
    String subscriptionCode;
}   

...
stepBuilderFactory.get("createUserStep1")
    .<User, User>chunk(1000)
    .reader(flatFileReader) // Read line from file and create partial user object (only get id, subscriptionCode)
    // Here - How to read DB using User.id read previously and extend User object with additionnal data
    .processor(new SkipDuplicatedUserItemProcessor()) // processor skip duplicated user
    .writer(itemWriter) // Write somewhere
    .build();

Answer 1

这个问题应该使用阅读器和处理器来解决使用FlatFileItemReader读取不完整的对象，使用ItemProcessor<YourObject,YourObject>完成丢失信息的对象。

Spring Batch统一多个读者结果

1 个答案: