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Clear duplicate lines and lines having missing values from a csv file

 

In the csv file below, some lines have null values, some have NaN values, and there are duplicate lines.

Sno,Country,noofDeaths

1,,32432

2,Pakistan,NaN

3,USA,3332

4,RUSSIA,

5,JAPAN,567

3,USA,3332

Use Java to do this: Delete lines containing null values or NaN values, and remove the duplicate lines. Below is the expected result:

Sno,Country,noofDeaths

3,USA,3332

5,JAPAN,567

Write the SPL script:

A

1

=T("data.csv")

2

=A1.select(~.array() ^ [null,NaN]==[])

3

=A2.group@1u(~.array()）

A1: Parse the csv file as a two-dimensional table.

A2: Convert records of the table to a sequence and perform intersection with [null,NaN] to get records that are not their common members.

A3: Group A2’s records, and get the first record from each group while keeping the original order.

Read How to Call a SPL Script in Java to find how to integrate SPL into a Java application.
Source:https://stackoverflow.com/questions/70806307/how-to-remove-row-which-contains-blank-cell-from-csv-file-in-java


 
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