Bean復(fù)制的幾種框架對(duì)比,看完心酸
本文轉(zhuǎn)載自微信公眾號(hào)「小明菜市場(chǎng)」,作者小明菜市場(chǎng) 。轉(zhuǎn)載本文請(qǐng)聯(lián)系小明菜市場(chǎng)公眾號(hào)。
正文
作為一個(gè)員工,最重要的不是編寫代碼,而是閱讀代碼,本博主在閱讀代碼的時(shí)候,發(fā)現(xiàn)幾種實(shí)現(xiàn)兩個(gè)不同類型的Bean的差異,本著研究的精神,仔細(xì)對(duì)比了Bean復(fù)制的性能差異。
比較的框架分別是Apache的BeanUtils,PropertyUtils,Spring的,BeanUtils,Cglib的BeanCopier。
做法是在idea新建了一個(gè)Project,專門用于專門測(cè)試幾種代碼的性能。具體的代碼如下:一個(gè)FromBean和一個(gè)ToBean。
- public class FromBean {
- private String name;
- private int age;
- private String address;
- private String idno;
- private double money;
- public double getMoney() {
- return money;
- }
- public void setMoney(double money) {
- this.money = money;
- }
- 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 getAddress() {
- return address;
- }
- public void setAddress(String address) {
- this.address = address;
- }
- public String getIdno() {
- return idno;
- }
- public void setIdno(String idno) {
- this.idno = idno;
- }
- }
一個(gè)用于測(cè)試的BenchmarkTest類
- public class BenchmarkTest {
- private int count;
- public BenchmarkTest(int count) {
- this.count = count;
- System.out.println("性能測(cè)試" + this.count + "==================");
- }
- public void benchmark(IMethodCallBack m, FromBean frombean) {
- try {
- long begin = new java.util.Date().getTime();
- ToBean tobean = null;
- System.out.println(m.getMethodName() + "開始進(jìn)行測(cè)試");
- for (int i = 0; i < count; i++) {
- tobean = m.callMethod(frombean);
- }
- long end = new java.util.Date().getTime();
- System.out.println(m.getMethodName() + "耗時(shí)" + (end - begin));
- System.out.println(tobean.getAddress());
- System.out.println(tobean.getAge());
- System.out.println(tobean.getIdno());
- System.out.println(tobean.getMoney());
- System.out.println(tobean.getName());
- System.out.println(" ");
- } catch (Exception e) {
- e.printStackTrace();
- }
- }
- }
對(duì)接口的聲明
- public interface IMethodCallBack {
- String getMethodName();
- ToBean callMethod(FromBean frombean) throws Exception;
- }
使用的測(cè)試類
- public class TestMain {
- /**
- * @param args
- */
- public static void main(String[] args) {
- FromBean fb = new FromBean();
- fb.setAddress("北京市朝陽區(qū)大屯路");
- fb.setAge(20);
- fb.setMoney(30000.111);
- fb.setIdno("110330219879208733");
- fb.setName("測(cè)試");
- IMethodCallBack beanutilCB = new IMethodCallBack() {
- @Override
- public String getMethodName() {
- return "BeanUtil.copyProperties";
- }
- @Override
- public ToBean callMethod(FromBean frombean) throws Exception {
- ToBean toBean = new ToBean();
- BeanUtils.copyProperties(toBean, frombean);
- return toBean;
- }
- };
- IMethodCallBack propertyCB = new IMethodCallBack() {
- @Override
- public String getMethodName() {
- return "PropertyUtils.copyProperties";
- }
- @Override
- public ToBean callMethod(FromBean frombean) throws Exception {
- ToBean toBean = new ToBean();
- PropertyUtils.copyProperties(toBean, frombean);
- return toBean;
- }
- };
- IMethodCallBack springCB = new IMethodCallBack() {
- @Override
- public String getMethodName() {
- return "org.springframework.beans.BeanUtils.copyProperties";
- }
- @Override
- public ToBean callMethod(FromBean frombean) throws Exception {
- ToBean toBean = new ToBean();
- org.springframework.beans.BeanUtils.copyProperties(frombean,
- toBean);
- return toBean;
- }
- };
- IMethodCallBack cglibCB = new IMethodCallBack() {
- BeanCopier bc = BeanCopier.create(FromBean.class, ToBean.class,
- false);
- @Override
- public String getMethodName() {
- return "BeanCopier.create";
- }
- @Override
- public ToBean callMethod(FromBean frombean) throws Exception {
- ToBean toBean = new ToBean();
- bc.copy(frombean, toBean, null);
- return toBean;
- }
- };
- // 數(shù)量較少的時(shí)候,測(cè)試性能
- BenchmarkTest bt = new BenchmarkTest(10);
- bt.benchmark(beanutilCB, fb);
- bt.benchmark(propertyCB, fb);
- bt.benchmark(springCB, fb);
- bt.benchmark(cglibCB, fb);
- // 測(cè)試一萬次性能測(cè)試
- BenchmarkTest bt10000 = new BenchmarkTest(10000);
- bt10000.benchmark(beanutilCB, fb);
- bt10000.benchmark(propertyCB, fb);
- bt10000.benchmark(springCB, fb);
- bt10000.benchmark(cglibCB, fb);
- // 擔(dān)心因?yàn)轫樞騿栴}影響測(cè)試結(jié)果
- BenchmarkTest bt1000R = new BenchmarkTest(10000);
- bt1000R.benchmark(cglibCB, fb);
- bt1000R.benchmark(springCB, fb);
- bt1000R.benchmark(propertyCB, fb);
- bt1000R.benchmark(beanutilCB, fb);
- }
- }
測(cè)試的結(jié)果如下
不過需要注意的是,Cglib在測(cè)試的時(shí)候,先進(jìn)行了實(shí)例的緩存,這個(gè)也是他性能較好的原因之一。如果把緩存去掉的話,性能就會(huì)出現(xiàn)了一些的差異,但是整體的性能還是很好, 從整體的表現(xiàn)來看,Cglib的BeanCopier的性能是最好的無論是數(shù)量較大的1萬次的測(cè)試,還是數(shù)量較少10次,幾乎都是趨近與零損耗,Spring是在次數(shù)增多的情況下,性能較好,在數(shù)據(jù)較少的時(shí)候,性能比PropertyUtils的性能差一些。PropertyUtils的性能相對(duì)穩(wěn)定,表現(xiàn)是呈現(xiàn)線性增長(zhǎng)的趨勢(shì)。而Apache的BeanUtil的性能最差,無論是單次Copy還是大數(shù)量的多次Copy性能都不是很好。