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Parse a csv file having two structures

 

The csv file below has two structures. The first two lines has one structure and the lines beginning from the 3rd line to the last has the other. Each structure is standardized.

CENTER_LABEL,LAYOUT,TYPE,WEIGHTED_TYPE,DIFFICUTLY,HINT,INITIAL,MASK,LEFT_LABEL,LEFT_VALUE_LIMIT
,,,AUTOMATIC,,,0,,,1
COLUMN_VALUE,CORRECT,CORRECT_ID,FEEDBACK,INITIAL,OTHER,PERCENT,ROW_VALUE,SEQUENCE
<p>c2</p>,false,,,false,false,50,<p>r1</p>,1
<p>c1</p>,false,,,false,false,0,<p>r2</p>,0
<p>c1</p>,false,,,false,false,0,<p>r1</p>,0
<p>c2</p>,false,,,false,false,50,<p>r2</p>,1

Task: Use Java to parse the csv file into two standard two-dimensional tables. One is:

CENTER_LABEL

LAYOUT

TYPE

WEIGHTED_TYPE

DIFFICUTLY

HINT

INITIAL

MASK

LEFT_LABEL

LEFT_VALUE_LIMIT

1


AUTOMATIC

0

1

And the other is:

COLUMN_VALUE

CORRECT

CORRECT_ID

FEEDBACK

INITIAL

OTHER

PERCENT

ROW_VALUE

SEQUENCE

1

<p>c2</p>

FALSE

FALSE

FALSE

50

<p>r1</p>

1

2

<p>c1</p>

FALSE

FALSE

FALSE

0

<p>r2</p>

0

3

<p>c1</p>

FALSE

FALSE

FALSE

0

<p>r1</p>

0

Write the following SPL script:

A

B

1

=file("data.csv").import@si()

2

=A1.to(,2).concat("\n")

=A2.import@tc()

3

=A1.to(3,).concat("\n")

=A3.import@tc()

4

return B2,B3

A1: Read the file as a sequence made up of rows to parse it.

A2: Get the first two lines and use the enter key to concatenate them into a string.

B2: Parse the string as a two-dimensional table having column headers and separated by the comma.


Read How to Call a SPL Script in Java to find how to integrate SPL into a Java application.

Source:https://stackoverflow.com/questions/72047230/java-opencsv-reading-a-file-that-contains-multiple-header-lines


 
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