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Bean复制的几种框架性能比较（Apache BeanUtils、PropertyUtils,Spring BeanUtils,Cglib BeanCopier）

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;

}

一个用于测试的BenchmarkTest类，为了减少重复代码，写了一个策略模式

public class BenchmarkTest {
    private int count;

    public BenchmarkTest(int count) {
        this.count = count;
        System.out.println("性能测试" + 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() + "开始进行测试");
            for (int i = 0; i < count; i++) {

                tobean = m.callMethod(frombean);

            }
            long end = new java.util.Date().getTime();
            System.out.println(m.getMethodName() + "耗时" + (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();
        }
    }
}

策略中使用的接口声明

public interface IMethodCallBack {

String getMethodName();

ToBean callMethod(FromBean frombean) throws Exception;

}

使用的测试类

public class TestMain {

/**
@param

args

public static void main(String[] args) {

FromBean fb = new FromBean();

fb.setAddress("北京市朝阳区大屯路");

fb.setAge(20);

fb.setMoney(30000.111);

fb.setIdno("110330219879208733");

fb.setName("测试");

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;

}

};

//另外一种BeanCopier缓存实现，效率更高

IMethodCallBack cglibCB2 = new IMethodCallBack() {

private ConcurrentHashMap<String,BeanCopier> cache=new ConcurrentHashMap<String, BeanCopier>();

@Override

public String getMethodName() {

return "BeanCopier.create";

}

@Override

public ToBean callMethod(FromBean frombean) throws Exception {

ToBean toBean = new ToBean();

return copyBeanProperties(sourceObj, target, false);

}

if(sourceObj==null||target==null) return null;

String key=sourceObj.getClass().getSimpleName()+target.getClass().getSimpleName();

BeanCopier copier = cache.get(key);

if(copier==null){

copier=createBeanCopier(sourceObj.getClass(), target.getClass(), useConverter, key);

}

copier.copy(sourceObj, target, null);

return target;

}

@SuppressWarnings({"rawtypes" })

private BeanCopier createBeanCopier(Class sourceClass,Class targetClass,boolean useConverter,String cacheKey){

BeanCopier copier = BeanCopier.create(sourceClass,targetClass, useConverter);

cache.putIfAbsent(cacheKey, copier);

return copier;

}

};

// 数量较少的时候，测试性能
BenchmarkTest bt = new BenchmarkTest(10);

bt.benchmark(beanutilCB, fb);

bt.benchmark(propertyCB, fb);

bt.benchmark(springCB, fb);

bt.benchmark(cglibCB, fb);

// 测试一万次性能测试
BenchmarkTest bt10000 = new BenchmarkTest(10000);

bt10000.benchmark(beanutilCB, fb);

bt10000.benchmark(propertyCB, fb);

bt10000.benchmark(springCB, fb);

bt10000.benchmark(cglibCB, fb);

// 担心因为顺序问题影响测试结果
BenchmarkTest bt1000R = new BenchmarkTest(10000);

bt1000R.benchmark(cglibCB, fb);

bt1000R.benchmark(springCB, fb);

bt1000R.benchmark(propertyCB, fb);

bt1000R.benchmark(beanutilCB, fb);

}

进行了三次测试，最后的结果如下：

10次测验	第一次	第二次	第三次	平均值	每次平均值
BeanUtil.copyProperties	54	57	50	53.66667	5.366666667
PropertyUtils.copyProperties	4	4	4	4	0.4
org.springframework.beans.BeanUtils.copyProperties	12	10	11	11	1.1
BeanCopier.create	0	0	0	0	0

10000次测验	第一次	第二次	第三次	平均值	每次平均值
BeanUtil.copyProperties	241	222	226	229.6667	0.022966667
PropertyUtils.copyProperties	92	90	92	91.33333	0.009133333
org.springframework.beans.BeanUtils.copyProperties	29	30	32	30.33333	0.003033333
BeanCopier.create	1	1	1	1	0.1

10000次反转测验	第一次	第二次	第三次	平均值	每次平均值
BeanUtil.copyProperties	178	174	178	176.6667	0.017666667
PropertyUtils.copyProperties	91	87	89	89	0.0089
org.springframework.beans.BeanUtils.copyProperties	21	21	21	21	0.0021
BeanCopier.create	0	1	1	0.666667	6.66667E-05