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 CSV > SUPER CSV > CSV to Bean

CSV to Bean 

Super CSV is a free library for reading and writing CSV files in Java. We need to have SuperCSV-1.52.jar, spiffy-0.05.jar or later versions in classpath. The following example shows populating java beans from CSV using Super CSV. User can provide a CellProcessor or Chain of CellProcessors for CSV data conversion.

File Name  :  
com/bethecoder/tutorials/super_csv/tests/CSV2Bean.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.super_csv.tests;

import java.io.IOException;
import java.io.StringReader;

import org.supercsv.cellprocessor.ParseInt;
import org.supercsv.cellprocessor.ift.CellProcessor;
import org.supercsv.io.CsvBeanReader;
import org.supercsv.prefs.CsvPreference;

import com.bethecoder.tutorials.super_csv.common.Student;

public class CSV2Bean {

  /**
   @param args
   @throws IOException 
   */
  public static void main(String[] argsthrows IOException {

    //CSV header names matching with bean properties
    String CSV = 
      "name,age,hobby\n" +
      "Sriram,2,Chess\n" +
      "Sudhakar,29,Painting";
    
    CsvBeanReader reader = new CsvBeanReader(new StringReader(CSV)
        CsvPreference.STANDARD_PREFERENCE);

    //Read headers
    String [] headers = reader.getCSVHeader(true);
    
    /**
     * Name and hobby doesn't require any processing
     * But age has to be converted to int before
     * setting the bean property.
     */
    CellProcessor [] processors = {
        //name, age, hobby
        null, new ParseInt()null
    };
    
    Student student = null;
    while ((student = reader.read(Student.class, headers, processors)) != null) {
      System.out.println(student);
    }

  }
}
   

File Name  :  
com/bethecoder/tutorials/open_csv/common/Student.java 
   
package com.bethecoder.tutorials.open_csv.common;

public class Student {

  private String name;
  private int age;
  private String hobby;
  
  public Student() {
  }

  public Student(String name, int age, String hobby) {
    super();
    this.name = name;
    this.age = age;
    this.hobby = hobby;
  }
  
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  public String getHobby() {
    return hobby;
  }
  public void setHobby(String hobby) {
    this.hobby = hobby;
  }
  
  public String toString() {
    return "Student[name = " + name + ", age = " + age + ", hobby = " + hobby + "]";
  }
}
   

It gives the following output,
Student[name = Sriram, age = 2, hobby = Chess]
Student[name = Sudhakar, age = 29, hobby = Painting]


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