Open the CSV file using a BufferedReaderin a try-with-resources block. Other Supported Conversions You can also convert JSON into many other file formats. We are going to parse the CSV data and create the POJO (Plain-Old-Java-Object) shown in this definition. If you are only interested in JSON to CSV conversion then check. When the CSV file to be parsed is simple that there are no quoted fields or commas embedded in fields, you can use a simple pattern matcher to split the CSV fields. In this method, we use the Java Collection classes to store the parsed data and convert those to JSON. The second method uses a more complete CSV parser with support for quoted fields and commas embedded within fields. We can easily convert JSON data into a map because the JSON format is essentially a key-value pair grouping and the map also stores data in key-value pairs. We often need to convert JSON responses into a map to work with the returned JSON data easily. Finally, save the csv into file using Files.write (). Java provides two very strong libraries to work with JSON data, i.e., JACKSON and Gson libraries. Using CDL.toString () we convert the JSONArray object to csv text. Create a JSONArray and pass the JSONTokener object as the constructor argument. ( a line is equivalent to a line in your CSV file). What the code does is initially reads the file, then creates a stream of String based lines. In my example its called YourJSONObject and has a constructor taking two strings. Create a JSONTokener and provide the InputStream as argument to its constructor. Firstly, create a POJO representing your new JSON object. Here you can make the headers bold with black background as well (as you requested earlier). I suggest you to save JSON as CSV (using above code block) and read the CSV (Using CSVReader) and write it to an XLS (Using apache-poi) csvtoxls. Also Create, Edit & Render Microsoft Excel, CSV and SpreadsheetML worksheets or spreadsheet in the Cloud. In this blog post, we will learn how to convert JSON to CSV using Java Excel library. GowthamanM I don't think just changing the file extension is going to work. its also easy to make, create and generate CSV/TSV (Comma S. The first method defines a POJO and uses simple string splitting to convert CSV data to POJO, which in turn is serialized to JSON. Get data.json from the resources directory as InputStream. Free Conversion of JSON to CSV by using Java Cloud APIs & SDKs. This converter is used to convert JSON (array of objects) into CSV/TSV (Comma Separated Values). Example: Suppose the JSON file looks like this: We want to convert the above JSON to CSV file with key as headers. In this article, we present a couple of methods to parse CSV data and convert it to JSON. For simple JSON data consisting of key and value pairs, keys will be headers for the CSV file and values the descriptive data.
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