在我看来,org.apache.hadoop.io.serializer.Serialization可以编写一个可以直接以与包装类序列化类型相同的格式串行化java类型.这样Mappers和Reducers就不必处理包装类了.
org.apache.hadoop.io.serializer.Serialization
serialization hadoop mapreduce writable
hadoop ×1
mapreduce ×1
serialization ×1
writable ×1