bean copy

最初采用apache beanutils，性能很低。后来转为hutool，但不能复制指定格式的日期，所以采用性能很高的com.github.yangtu222.BeanUtils

它已经实现了 copyBean、copyList、copyArray、copyCollection。而hutool没有实现copyList、copyArray、copyCollection，需要自行封装实现。

pom.xml

<dependency>

        <groupId>com.github.yangtu222</groupId>

        <artifactId>BeanUtils</artifactId>

        <version>1.0.9</version>

    </dependency>

项目概览

实现的功能：

1、基本类型

2、Date

3、List/Parent

4、继承

注意要点：

1、如果复制 Date/Pojo，需要在目标类的相应属性上加@CopyProperty，基本类型/List不用。

ToBean

public class ToBean extends MyBase {

    private Integer id;

    private Double scope;

    private String name;

    @CopyProperty(convertor=DateConvertor.class)

    private String myDate;

    @CopyProperty(convertor=DateConvertor2.class)

    private Date myDate2;

    private List<ToChild> list;

    @CopyProperty

    private ToParent parent;

}

反之，如果从ToBean复制到FromBean，则也需要在FromBean的相应属性上加@CopyProperty。

FromBean

public class FromBean extends MyBase {

    private Integer id;

    private Double scope;

    private String name;

    @CopyProperty(convertor=DateConvertor2.class)

    private Date myDate;

    @CopyProperty(convertor=DateConvertor.class)

    private String myDate2;

    private List<FromChild> list;

    @CopyProperty

    private FromParent parent;

}

如果不会从ToBean复制到FromBean，那么FromBean里的相应属性不需要加@CopyProperty。

2、日期转换需要实现BeanCopyConvertor

DateConvertor：Date-->String

public class DateConvertor implements BeanCopyConvertor<Date, String> {

    @Override

    public String convertTo(Date object) {

        if( object == null ) {

            object = new Date();

        }

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");

        return format.format(object);

    }

}

DateConvertor2：String--->Date

public class DateConvertor2 implements BeanCopyConvertor<String,Date> {

    @Override

    public Date convertTo(String object) {

        if( object == null ) {

            return null;

        }

        return DateUtil.parse(object, "yyyy-MM-dd");

    }

}

测试1：from--->to

@Test

    public void from2to() throws Exception {

        FromBean from = new FromBean();

        from.setId(1);

        from.setScope(98.6);

        from.setName("遥远2");

        from.setMyDate(DateTime.now());

        from.setMyDate2(DateUtil.now());

        from.setIsDelete(false);

        from.setList(CollUtil.newArrayList(new FromChild("子1"),new FromChild("子2"),new FromChild("子3")));

        from.setParent(new FromParent((byte) 'a'));

        ToBean toBean = BeanCopyUtils.copyBean(from, ToBean.class);

        Console.log(toBean);

    }

输出：

ToBean(

    super=MyBase(isDelete=false),

    id=1,

    scope=98.6,

    name=遥远2,

    myDate=2019-01-16,

    myDate2=2019-01-16 00:00:00,

    list=[

        FromChild(childName=子1),

        FromChild(childName=子2),

        FromChild(childName=子3)

    ],

    parent=ToParent(sign=97)

)

测试2：to-->from

@Test

    public void to2from() throws Exception {

        ToBean to = new ToBean();

        to.setId(1);

        to.setScope(98.6);

        to.setName("遥远2");

        to.setMyDate(DateUtil.now());

        to.setMyDate2(DateTime.now());

        to.setIsDelete(false);

        to.setList(CollUtil.newArrayList(new ToChild("子1"),new ToChild("子2"),new ToChild("子3")));

        to.setParent(new ToParent((byte) 'b'));

        FromBean fromBean = BeanCopyUtils.copyBean(to, FromBean.class);

        Console.log(fromBean);

    }

输出：

FromBean(

 id=1,

 scope=98.6,

 name=遥远2,

 myDate=2019-01-16 00:00:00,

 myDate2=2019-01-16,

 list=[

     ToChild(super=com.ebc.beancopy.base.ToChild@6483f5ae,childName=子1),

     ToChild(super=com.ebc.beancopy.base.ToChild@b9afc07,childName=子2),

     ToChild(super=com.ebc.beancopy.base.ToChild@382db087,childName=子3)

 ],

 parent=FromParent(sign=98))

以上是copyBean。下边是copyList和copyArray的测试

测试3：copyList

@Test

    public void testCopyList() throws Exception {

        List<FromChild> fromList = CollUtil.newArrayList(new FromChild("子1"),new FromChild("子2"),new FromChild("子3"));

        List<ToChild> toList = BeanCopyUtils.copyList(fromList, ToChild.class);

        Console.log(toList);

    }

输出：

[

    ToChild(super=com.ebc.beancopy.base.ToChild@366e2eef, childName=子1),

    ToChild(super=com.ebc.beancopy.base.ToChild@6df97b55, childName=子2),

    ToChild(super=com.ebc.beancopy.base.ToChild@3cbbc1e0, childName=子3)

]

测试4：copyArray

@Test

    public void testCopyArray() throws Exception {

        FromChild [] from = {new FromChild("子1"),new FromChild("子2"),new FromChild("子3")};

        ToChild [] to = BeanCopyUtils.copyArray(from, ToChild.class);

        Console.log(to);

    }

输出：

[

    ToChild(super=com.ebc.beancopy.base.ToChild@6537cf78, childName=子1),

    ToChild(super=com.ebc.beancopy.base.ToChild@67b6d4ae, childName=子2),

    ToChild(super=com.ebc.beancopy.base.ToChild@34b7bfc0, childName=子3)

]

巴特西

bean copy

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