---
title: Java封装orika实现对象拷贝
date: 2020-06-19 13:10:57
description: Java封装orika实现对象拷贝
categories: [技术总结]
tags: [Java]
---

## 说明
一直使用orika复制对象，最近偶然发现了orika还有属性复制的功能，研究后封装了一下，以后用起来就更方便了

### pom.xml
```xml
<dependency>
	<groupId>ma.glasnost.orika</groupId>
	<artifactId>orika-core</artifactId>
	<version>1.4.6</version>
</dependency>
```

### 工具类
- 做了简单的封装，按业务需要可以选择是否覆盖空值
- 还有很多更灵活的配置暂时没用到，比如可以指定不同名字、不同类型字段的映射关系，这些等以后有需求的时候再加上
```java BeanMapper.java
import ma.glasnost.orika.MapperFacade;
import ma.glasnost.orika.MapperFactory;
import ma.glasnost.orika.impl.DefaultMapperFactory;

import java.util.List;

/**
 * 简单封装orika, 实现深度转换Bean<->Bean的Mapper.
 */
public class BeanMapper {

    private static MapperFacade defaultMapper;

    private static MapperFacade ignoreNullMapper;

    static {
        MapperFactory defaultMapperFactory = new DefaultMapperFactory.Builder().build();
        defaultMapper = defaultMapperFactory.getMapperFacade();
        MapperFactory ignoreNullMapperFactory = new DefaultMapperFactory.Builder().mapNulls(false).build();
        ignoreNullMapper = ignoreNullMapperFactory.getMapperFacade();
    }

    /**
     * 复制对象的属性（忽略null）
     */
    public static <S, D> void mapIgnoreNull(S sourceObject, D destinationObject) {
        ignoreNullMapper.map(sourceObject, destinationObject);
    }

    /**
     * 复制对象的属性
     */
    public static <S, D> void map(S sourceObject, D destinationObject) {
        defaultMapper.map(sourceObject, destinationObject);
    }

    /**
     * 复制对象
     */
    public static <S, D> D map(S source, Class<D> destinationClass) {
        return defaultMapper.map(source, destinationClass);
    }

    /**
     * 复制对象list
     */
    public static <S, D> List<D> mapList(Iterable<S> sourceList, Class<D> destinationClass) {
        return defaultMapper.mapAsList(sourceList, destinationClass);
    }

}
```