Java tutorial
/** * Copyright (c) 2014-2016 https://github.com/playersun * * Licensed under the Apache License, Version 2.0 (the "License"); */ package com.playersun.jbf.common.entity; import java.io.Serializable; import org.apache.commons.lang3.builder.ReflectionToStringBuilder; public abstract class BaseEntity<T> implements Serializable { private static final long serialVersionUID = 8907307663203988814L; protected Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; } @Override public boolean equals(Object obj) { if (null == obj) { return false; } if (this == obj) { return true; } if (!getClass().equals(obj.getClass())) { return false; } BaseEntity<?> that = (BaseEntity<?>) obj; return null == this.getId() ? false : this.getId().equals(that.getId()); } @Override public String toString() { return ReflectionToStringBuilder.toString(this); } }