• code: https://github.com/java-code-examples/jackson-fasterxml-csv-example

1 - Subpages

• Jackson - CSV - CsvSchema
• Jackson - CSV - Custom NullSerializer
• Jackson - CSV - Retrieving List of POJO Field Names and Types as Seen from CsvMapper

2 - Dependency

<!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-csv -->
<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-csv</artifactId>
    <version>2.12.1</version>
</dependency>

3 - Example

our POJO object we want in CSV format

@Data
public static class Temp2 {
    public String field1 = "field1 here";
    public String field2 = "field2 here";
    public Temp1 temp1 = new Temp1();
}

setup CsvMapper & CsvSchema & ObjectWriter

// 1 - Initiatize Mapper
CsvMapper mapper = new CsvMapper();

// 2.1 - Initialize Schema (from POJO adheres to @JsonIgnore, etc)
CsvSchema schema = mapper.schemaFor(Pojo.class);

// 2.2 - Initialize Schema (manually)
CsvSchema schema = CsvSchema.builder()
	.addColumn("field1")
	.addColumn("field2")
	.build() // NOTE we ignore Temp2's temp1 field
	.withHeader(); 

// 3 - Initialize Writer
ObjectWriter writer = mapper.writerFor(Temp2.class).with(schema);

using ObjectWriter

// Get CSV of single Temp2 object
writer.writeValueAsString(new Temp2());

// Get CSV of a list of Temp2 objects
List<Temp2> temp2List = Arrays.asList(new Temp2(), new Temp2());
writer.writeValues(new File("sample.csv")).writeAll(temp2List);