In the tutorial, we show how to convert Json to XML and vice versa in Kotlin language.
Contents
Json dependency
For convert Json to/from XML we use JSONObject, so we need a dependency:
<dependency> <groupId>org.json</groupId> <artifactId>json</artifactId> <version>20180130</version> </dependency> |
Kotlin – Convert Json to XML
Convert Json String to XML String
var jsonStr = "{\"Customer\": {" + "\"address\": {" + "\"street\": \"NANTERRE CT\"," + "\"postcode\": 77471" + "}," + "\"name\": \"Mary\"," + "\"age\": 37" + "}}" var json = JSONObject(jsonStr) var xml = XML.toString(json) println(xml) /* <Customer><address><street>NANTERRE CT</street><postcode>77471</postcode></address><name>Mary</name><age>37</age></Customer> */ |
Convert Json File to XML file
val jsonFile = System.getProperty("user.dir") + "\\file.json" val xmlFile = System.getProperty("user.dir") + "\\file.xml" jsonStr = File(jsonFile).readText() json = JSONObject(jsonStr) File(xmlFile).writeText(XML.toString(json)) |
Kotlin – Full Program
package com.javasampleapproach.kotlin.jsonxml import java.io.File import org.json.JSONObject import org.json.XML fun main(args: Array<String>) { // 1. Convert Json String -> XML String var jsonStr = "{\"Customer\": {" + "\"address\": {" + "\"street\": \"NANTERRE CT\"," + "\"postcode\": 77471" + "}," + "\"name\": \"Mary\"," + "\"age\": 37" + "}}" var json = JSONObject(jsonStr) var xml = XML.toString(json) println(xml) /* <Customer><address><street>NANTERRE CT</street><postcode>77471</postcode></address><name>Mary</name><age>37</age></Customer> --> pretty-print <?xml version="1.0"?> <Customer> <address> <street>NANTERRE CT</street> <postcode>77471</postcode> </address> <name>Mary</name> <age>37</age> </Customer> */ // 2. Convert Json File -> XML File val jsonFile = System.getProperty("user.dir") + "\\file.json" val xmlFile = System.getProperty("user.dir") + "\\file.xml" jsonStr = File(jsonFile).readText() json = JSONObject(jsonStr) File(xmlFile).writeText(XML.toString(json)) } |
Kotlin – Convert XML to Json
Convert XML String to Json String
val PRETTY_PRINT_INDENT_FACTOR = 4 var xmlString = "<Customer>" + " <name>Mary</name>" + " <age>37</age>" + " <address>" + " <street>NANTERRE CT</street>" + " <postcode>77471</postcode>" + " </address>" + "</Customer>" var xmlJSONObj = XML.toJSONObject(xmlString) val jsonPrettyPrintString = xmlJSONObj.toString(PRETTY_PRINT_INDENT_FACTOR) println(jsonPrettyPrintString) /* {"Customer": { "address": { "street": "NANTERRE CT", "postcode": 77471 }, "name": "Mary", "age": 37 }} */ |
Convert XML File to Json File
var xmlFile = System.getProperty("user.dir") + "\\file.xml" xmlString = File(xmlFile).readText() xmlJSONObj = XML.toJSONObject(xmlString) val jsonFile = System.getProperty("user.dir") + "\\file.json" File(jsonFile).writeText(xmlJSONObj.toString(PRETTY_PRINT_INDENT_FACTOR)) |
Kotlin – Full Program
package com.javasampleapproach.kotlin.jsonxml import java.io.File import org.json.JSONObject import org.json.XML fun main(args: Array<String>) { // 1. Convert XML String -> Json String val PRETTY_PRINT_INDENT_FACTOR = 4 var xmlString = "<Customer>" + " <name>Mary</name>" + " <age>37</age>" + " <address>" + " <street>NANTERRE CT</street>" + " <postcode>77471</postcode>" + " </address>" + "</Customer>" var xmlJSONObj = XML.toJSONObject(xmlString) val jsonPrettyPrintString = xmlJSONObj.toString(PRETTY_PRINT_INDENT_FACTOR) println(jsonPrettyPrintString) /* {"Customer": { "address": { "street": "NANTERRE CT", "postcode": 77471 }, "name": "Mary", "age": 37 }} */ // 2. Convert XML File -> Json File var xmlFile = System.getProperty("user.dir") + "\\file.xml" xmlString = File(xmlFile).readText() xmlJSONObj = XML.toJSONObject(xmlString) val jsonFile = System.getProperty("user.dir") + "\\file.json" File(jsonFile).writeText(xmlJSONObj.toString(PRETTY_PRINT_INDENT_FACTOR)) } |