openCsv.groovy

@Grab(group = 'net.sf.opencsv', module = 'opencsv', version = '2.3')
import au.com.bytecode.opencsv.CSVReader
import au.com.bytecode.opencsv.CSVParser
import au.com.bytecode.opencsv.CSVWriter

def TEST_FILE_NAME = 'test.csv'
def TEST_OUTPUT_FILE_NAME = 'testOut.csv'

List<String[]> rows = new CSVReader(new FileReader(new File(TEST_FILE_NAME)), CSVParser.DEFAULT_SEPARATOR, CSVParser.DEFAULT_ESCAPE_CHARACTER, CSVParser.DEFAULT_QUOTE_CHARACTER, 1).readAll()
// to filter the resultSet:
def rowsOver100 = rows.findAll {it[1].toInteger() > 100}

File output = new File(TEST_OUTPUT_FILE_NAME)
if (output.exists()) { output.delete() }

// Atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist. 
// Returns false if there already existed a file with the same name.
// output.createNewFile() // El withWriter ya crea el archivo si detecta que no existe

// TODO: writer en ANSI (para Excel)
output.withWriter { writer ->
    new CSVWriter(writer).writeAll(rowsOver100)
}

//println rows