假設有一個檔案裡存放隨機10億個數值(範例0~2147,483647),要如何排序呢?
程式範例邏輯步驟:
- 亂數產生10個數值並寫入1個檔案(約10gb)numbers.txt。
- 讀取大檔進行折分500萬為一組並降冪排序後寫入1個檔案(約52mb),總共產生200個檔案。
- 以迴圈方式取所有200個檔案第1筆數值比最小值再寫入result.txt。
- 刪除步驗2產生的200個檔案。
排序10億個數值(Sort large File using Java)
License: MIT License
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