![]() ![]() Now, let's use Jackson's CsvMapper to read our CSV file into a List of OrderLine objects. When we run this sample code, our example JSON document is converted to the expected CSV file. It supports custom CSV column separators and custom quote characters for fields. writeValue(new File("src/main/resources/orderLines.csv"), jsonTree) This tool transforms JavaScript Object Notation (JSON) data structures (in string format) to Comma Separated Values (CSV). Then, we create a CsvMapper with our CsvSchema, and finally, we write the jsonTree to our CSV file: CsvMapper csvMapper = new CsvMapper() ![]() JsonNode firstObject = jsonTree.elements().next() įirstObject.fieldNames().forEachRemaining(fieldName -> ) ĬsvSchema csvSchema = csvSchemaBuilder.build().withHeader() To do this, we create a CsvSchema Builder and set the column headers to match the JSON field names: Builder csvSchemaBuilder = CsvSchema.builder() This determines the column headers, types, and sequence of columns in the CSV file. First, we use Jackson's ObjectMapper to read our example JSON document into a tree of JsonNode objects: JsonNode jsonTree = new ObjectMapper().readTree(new File("src/main/resources/orderLines.json")) ![]()
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