Spark经典案例6-求top值

需求分析 orderid,userid,payment,productid 求topN的payment值 a.txt 1,9819,100,121 2,8918,2000,111 3,2813,1234,22 4,9100,10,1101 5,3210,490,111 6,1298,28,1211 7,1010,281,90 8,1818,9000,20java b.txt 100,3333,10

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