有没有一种聪明的方法来编写固定长度的平面文件？ [英] Is there an smart way to write a fixed length flat file?

问题描述

是否有任何框架/库可以帮助在java中编写固定长度的平面文件？

Is there any framework/library to help writing fixed length flat files in java?

我想将bean /实体的集合写入平面文件而不用担心转换，填充，对齐，填充等等

I want to write a collection of beans/entities into a flat file without worrying with convertions, padding, alignment, fillers, etcs

例如，我想解析一个bean，如：

For example, I'd like to parse a bean like:

public class Entity{
    String name = "name"; // length = 10; align left; fill with spaces
    Integer id = 123; // length = 5; align left; fill with spaces
    Integer serial = 321 // length = 5; align to right; fill with '0'
    Date register = new Date();// length = 8; convert to yyyyMMdd
}

...进入......

... into ...

name      123  0032120110505
mikhas    5000 0122120110504
superuser 1    0000120101231

...

推荐答案

如果您还在寻找框架，请访问 http://www.beanio.org

If you are still looking for a framework, check out BeanIO at http://www.beanio.org

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