Kotlin - How to Read CSV File in Kotlin

Kotlin, learn how to Read CSV File.

#kotlin #android #kotlinandroid #kotlincsv #tutorial

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How to read/write CSV file in Kotlin » grokonez

https://grokonez.com/kotlin/kotlin-read-write-csv-file-example

How to read/write CSV file in Kotlin

In this tutorial, we’re gonna look at examples that read and write CSV file using native Kotlin.

I. Write Data to CSV File

- Simple POJO Customer (id, name, address, age):

package com.javasampleapproach.kotlin.csv
class Customer {

var id: String? = null

var name: String? = null

var address: String? = null

var age: Int = 0
constructor() {}
constructor(id: String?, name: String?, address: String?, age: Int) {
	this.id = id
	this.name = name
	this.address = address
	this.age = age
}

override fun toString(): String {
	return "Customer [id=" + id + ", name=" + name + ", address=" + address + ", age=" + age + "]"
}

}

• Write Customer List to CSV file:

More at:

https://grokonez.com/kotlin/kotlin-read-write-csv-file-example

How to read/write CSV file in Kotlin

#csv #kotlin #read-file #write-file

Kotlin - How to read/write Excel file with Apache POI » grokonez

https://grokonez.com/kotlin/kotlin-read-write-excel-file-apache-poi-example

Kotlin – How to read/write Excel file with Apache POI

In this tutorial, we’re gonna look at Kotlin examples that read and write Excel file using Apache POI.

I. Dependency

<dependency>
	<groupId>org.jetbrains.kotlin</groupId>
	<artifactId>kotlin-stdlib</artifactId>
	<version>1.2.21</version>
</dependency>
<dependency>

<groupId>org.apache.poi</groupId>

<artifactId>poi-ooxml</artifactId>

<version>3.17</version>

</dependency>

II. Write Data to Excel File

- Simple POJO Customer (id, name, address, age):

package com.javasampleapproach.kotlin.apachecsv
class Customer {

var id: String? = null

var name: String? = null

var address: String? = null

var age: Int = 0
constructor() {}
constructor(id: String?, name: String?, address: String?, age: Int) {
	this.id = id
	this.name = name
	this.address = address
	this.age = age
}

override fun toString(): String {
	return "Customer [id=" + id + ", name=" + name + ", address=" + address + ", age=" + age + "]"
}

}

• Write to Excel file:

More at:
https://grokonez.com/kotlin/kotlin-read-write-excel-file-apache-poi-example

Kotlin – How to read/write Excel file with Apache POI

#kotlin #apache-poi #excel #read-file #write-file

Kotlin Properties - Read/Write Properties from/to .properties/.XML File - ozenero

https://ozenero.com/kotlin-properties-read-write-properties-file-properties-xml-file

Kotlin Properties – Read/Write Properties from/to .properties/.XML File

In the post, we show how to Read/Write Properties from/to .Properties/.XML files by Kotlin language.

I. Kotlin - Read/Write Properties from/to .Properties file

1. Write Properties to .Properties file

1.1 Properties store() method

We use java.util.Properties.store() methods:

// 1.
fun store(out: OutputStream, comments: String): Unit

-> Writes this property list (key and element pairs) in this Properties table 
to the output stream in a format suitable for loading into a Properties table using the load(InputStream) method.

// 2.
fun store(writer: Writer, comments: String): Unit

-> Writes this property list (key and element pairs) in this Properties table 
to the output character stream in a format suitable for using the load(Reader) method.

1.2 Kotlin Program – write Properties to .properties file

More at:

https://ozenero.com/kotlin-properties-read-write-properties-file-properties-xml-file

Kotlin Properties – Read/Write Properties from/to .properties/.XML File

#kotlin #xml #read-file #write-file

Kotlin - How to read/write CSV file with OpenCSV » grokonez

https://grokonez.com/kotlin/kotlin-how-to-read-write-csv-file-with-opencsv-example

Kotlin – How to read/write CSV file with OpenCSV

In this tutorial, we’re gonna look at Kotlin examples that read and write CSV file using OpenCSV.

I. Dependency

<dependency>
	<groupId>org.jetbrains.kotlin</groupId>
	<artifactId>kotlin-stdlib</artifactId>
	<version>1.2.21</version>
</dependency>
<dependency>

<groupId>com.opencsv</groupId>

<artifactId>opencsv</artifactId>

<version>4.0</version>

</dependency>

II. Write Data to CSV File

1. From String Array

var fileWriter = FileWriter("customer.csv")
csvWriter = CSVWriter(fileWriter,

CSVWriter.DEFAULT_SEPARATOR,

CSVWriter.NO_QUOTE_CHARACTER,

CSVWriter.DEFAULT_ESCAPE_CHARACTER,

CSVWriter.DEFAULT_LINE_END)
val data = arrayOf(“ID”,“NAME”,“ADDRESS”,“AGE”)

csvWriter.writeNext(data)

2. From List of Objects

More at:

https://grokonez.com/kotlin/kotlin-how-to-read-write-csv-file-with-opencsv-example

Kotlin – How to read/write CSV file with OpenCSV

#kotlin #csv-file #opencsv

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