I am getting below error The method readerFor Class Map is undefined for the type CsvMapper

Question

I Have requirement to convert csv to json and generate multiple json files as per records available in csv file.

Please find below code:

import java.io.File;
import java.lang.*;
import java.util.Arrays;
import java.util.List;

import java.util.Map;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.databind.SerializationFeature;

import com.fasterxml.jackson.dataformat.csv.CsvMapper;

import com.fasterxml.jackson.dataformat.csv.CsvSchema;

public class ConvertCSVtoJson {
@SuppressWarnings("unchecked")
public static void main(String[] args) throws Exception {

        File input = new File("D:\\Monika\\Test.csv");
        CsvSchema csvSchema = CsvSchema.builder().setUseHeader(true).build();
        CsvMapper csvMapper = new CsvMapper();

        // Read data from CSV file
        List<Object> readAll = Arrays.asList(csvMapper.readerFor(Map.class).with(csvSchema).readValues(input).readAll());
                    ObjectMapper mapper = new ObjectMapper();
        mapper.enable(SerializationFeature.INDENT_OUTPUT);
        // Write JSON formated data to output.json file
           for (Object row : readAll) {
        Map<String, String> map = (Map<String, String>) row;
        String fileName = map.get("fileName");
        File output = new File("D:\\Monika\\"+fileName+".txt");
         mapper.writerWithDefaultPrettyPrinter().writeValue(output, row);
                }
          }
}

i am getting error on line"        List<Object> readAll = Arrays.asList(csvMapper.readerFor(Map.class).with(csvSchema).readValues(input).readAll());".

Kindly suggest.

Comments

Hi,

can anyone help me?

i am trying it from last week.

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Hey @Monika, your code looks fine. I guess this might be a dependency issue. Have you added the required dependency files?

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Hi,

i added all dependencies also.

PFB details:

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
                      http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.conversion.ConvertCSVtoJson</groupId>
    <artifactId>ConvertCSVtoJson</artifactId>
    <name>ConvertCSVtoJson</name>
 
    <dependencies>
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-databind</artifactId>
         <version>2.2.3</version>
       </dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.core</groupId>
         <artifactId>jackson-core</artifactId>
         <version>2.2.3s</version>
       </dependency>
       <dependency>
         <groupId>com.fasterxml.jackson.dataformat</groupId>
         <artifactId>jackson-dataformat-csv</artifactId>
         <version>2.1.4</version>
       </dependency>      
    </dependencies>
    <version>2.1.4</version>
</project>

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Have you added the corresponding jar dependency files to the build path?

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yes,i added the corresponding jar files to build path.

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This might help, check the following https://github.com/FasterXML/jackson-dataformats-text/tree/master/csv