我想将一个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

例如,我想解析一个bean,如：

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…

name      123  0032120110505
mikhas    5000 0122120110504
superuser 1    0000120101231

…