聊聊BeanUtils.copyProperties和clone()方法的区别

<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.1.3</version>
</dependency>
<dependency>
    <groupId>commons-beanutils</groupId>
    <artifactId>commons-beanutils</artifactId>
    <version>1.9.2</version>
</dependency>

    private String userName;
    private String password;
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

 private String userName;
    private String password;
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }

public static void main(String[] args) {
        TestBean bean = new TestBean();
        bean.setUserName("qxf");
        bean.setPassword("123");
        CopyBean copyBean = new CopyBean();
        try {
   //这个地方如果你安装了阿里的代码检测控件的话，会报错，提示你使用spring的BeanUtils，而不要使用apache的BeanUtils
            BeanUtils.copyProperties(copyBean,bean);
            System.out.println(copyBean.getUserName());
            System.out.println(copyBean.getPassword());
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
    }

		<dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.0.7.RELEASE</version>
        </dependency>

public static void main(String[] args) {
        TestBean bean = new TestBean();
        bean.setUserName("qxf");
        bean.setPassword("123");
        CopyBean copyBean = new CopyBean();
        //这个和apache的恰恰相反，具体的原因需要查看源码才可以理解
        BeanUtils.copyProperties(bean,copyBean);
        System.out.println(copyBean.getUserName());
        System.out.println(copyBean.getPassword());
    }

/**
* @Description:  
* @Author: qxf
* @Date: 2019/2/21 2:22 PM
*/ 
public class StudentEntity implements Cloneable {
    private String userName;
    private String passWord;
    private List<String> list;
    public List<String> getList() {
        return list;
    }
    public void setList(List<String> list) {
        this.list = list;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getPassWord() {
        return passWord;
    }
    public void setPassWord(String passWord) {
        this.passWord = passWord;
    }
    @Override
    protected Object clone() throws CloneNotSupportedException {
        return super.clone();
    }
}

public void testClone(){
        //测试clone方法
        StudentEntity entity = new StudentEntity();
        entity.setUserName("qxf");
        entity.setPassWord("test");
        List<String> list = new ArrayList<>();
        list.add("Test1");
        list.add("Test2");
        list.add("Test3");
        list.add("Test4");
        entity.setList(list);
        try {
            StudentEntity entityClone = (StudentEntity) entity.clone();
            System.out.println(entityClone.getUserName());
            System.out.println(entityClone.getPassWord());
            List<String> entityList = new ArrayList<>();
            entityList = entityClone.getList();
            for (int i=0;i<entityList.size();i++){
                System.out.println(entityList.get(i));
            }
        }catch (Exception e){
            e.printStackTrace();
        }
    }