1.apache BeanUtils 性能太差 日志太多

2.Apache PropertyUtils 性能可以参考，但是数据量大了比起Cglib 还是慢很多

3.Spring BeanUtils 上了一定的数量级别比较慢

4.Cglib BeanCopier 目前看来比较稳定

5.com.rits.cloning ，数量级别大了 也慢

package com.helloxin.restful.api;

import com.helloxin.restful.api.bo.CarBO;

import com.rits.cloning.Cloner;

import lombok.extern.slf4j.Slf4j;

import net.sf.cglib.beans.BeanCopier;

import org.apache.commons.beanutils.PropertyUtils;

import org.junit.Test;

import org.springframework.beans.BeanUtils;

import java.lang.reflect.InvocationTargetException;

import java.util.List;

import java.util.stream.Collectors;

import java.util.stream.IntStream;

@Slf4j

public class BeanCopyTest {

final static public Integer NUM = 10000;

@Test

public void beanSpringCopyTest() {

List list = createData(NUM);

long start = System.currentTimeMillis();

for(int i = 0;i< NUM;i++){

CarBO newCar = new CarBO();

BeanUtils.copyProperties(list.get(i), newCar);

}

log.info("duration={}", System.currentTimeMillis() - start);

}

@Test

public void beanCglibCopyTest() {

List list = createData(NUM);

long start = System.currentTimeMillis();

BeanCopier b = BeanCopier.create(CarBO.class, CarBO.class, false);

for(int i = 0;i< NUM;i++){

CarBO newCar = new CarBO();

b.copy(list.get(i), newCar, null);

}

log.info("duration={}", System.currentTimeMillis() - start);

}

@Test

public void beanApacheCopyTest() throws InvocationTargetException, IllegalAccessException {

List list = createData(NUM);

long start = System.currentTimeMillis();

BeanCopier b = BeanCopier.create(CarBO.class, CarBO.class, false);

for(int i = 0;i< NUM;i++){

CarBO newCar = new CarBO();

org.apache.commons.beanutils.BeanUtils.copyProperties(newCar,list.get(i));

}

log.info("duration={}", System.currentTimeMillis() - start);

}

@Test

public void beanApachePropertyUtilsCopyTest() throws InvocationTargetException, IllegalAccessException, NoSuchMethodException {

List list = createData(NUM);

long start = System.currentTimeMillis();

BeanCopier b = BeanCopier.create(CarBO.class, CarBO.class, false);

for(int i = 0;i< NUM;i++){

CarBO newCar = new CarBO();

PropertyUtils.copyProperties(newCar,list.get(i));

}

log.info("duration={}", System.currentTimeMillis() - start);

}

@Test

public void beanRitsCloningTest() throws InvocationTargetException, IllegalAccessException, NoSuchMethodException {

List list = createData(NUM);

long start = System.currentTimeMillis();

Cloner cloner = new Cloner();

for(int i = 0;i< NUM;i++){

cloner.deepClone(list.get(i));

}

log.info("duration={}", System.currentTimeMillis() - start);

}

private CarBO createData() {

return CarBO.builder().make("st").numberOfSeats(12).build();

}

private List createData(int num) {

return IntStream.range(0, num).mapToObj(i -> CarBO.builder().make("st").numberOfSeats(i).build()).collect(Collectors.toList());

}

}