Mega Code Archive
Bean Comparator ( Sorting based on Properties of class )
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package com.googelcode.jpractices.common;
import org.apache.commons.lang.builder.ToStringBuilder;
/**
* Copyright 2009 @ jPractices v 1.0
* @SVN URL : http://jpractices.googlecode.com
* @author Ganesh Gowtham
* @Homepage : http://ganesh.gowtham.googlepages.com
*/
public class Person {
private String firstName;
private String lastName;
private int salary;
public Person(String firstName, String lastName, int salary) {
super();
this.firstName = firstName;
this.lastName = lastName;
this.salary = salary;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public int getSalary() {
return salary;
}
public void setSalary(int salary) {
this.salary = salary;
}
@Override
public String toString() {
return ToStringBuilder.reflectionToString(this);
}
}
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package com.googelcode.jpractices;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.apache.commons.beanutils.BeanComparator;
import com.googelcode.jpractices.common.Person;
/**
* Copyright 2009 @ jPractices v 1.0
* @SVN URL : http://jpractices.googlecode.com
* @author Ganesh Gowtham
* @Homepage : http://ganesh.gowtham.googlepages.com
*/
public class BeanComparatorExample {
List<Person> personList = new ArrayList<Person>();
/**
* Basic method which creates the list of person object's
*
*/
void setUpData() {
personList.add(new Person("jennefer", "gowtham", 35000));
personList.add(new Person("britney", "spears", 45000));
personList.add(new Person("tom", "gowtham", 36000));
personList.add(new Person("joe", "dummy", 45000));
}
void sortPersons(String propertyName)
{
Comparator<Person> comp = new BeanComparator(propertyName);
Collections.sort(personList, comp);
for (Person person : personList) {
System.out.println(person);
}
}
public static void main(String[] args) {
BeanComparatorExample beanComparatorExample = new BeanComparatorExample();
beanComparatorExample.setUpData();
beanComparatorExample.sortPersons("firstName");
}
}
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