http://www.programcreek.com/java-api-examples/index.php?source_dir=hiped2-master/src/main/java/hip/ch3/parquet/ExampleParquetMapReduce.java
parquet列式文件实战（未完，待续）
原文：https://www.cnblogs.com/panpanwelcome/p/10250896.html
