Dozer 实现对象间属性复制

Posted 2020-08-05 陈小兵

使用场景：两个领域之间对象转换。

比如：在系统分层解耦过程中, 对外facade接口，一般使用VO对象，而内core业务逻辑层或者数据层通常使用Entity实体。

 

VO对象

package com.maven.demo;

public class ProductVO{
    private Long id;
    private String name;
    private String description;
    public Long getId() {
        return id;
    }
    public void setId(Long id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getDescription() {
        return description;
    }
    public void setDescription(String description) {
        this.description = description;
    }
    
}

 

实体对象

package com.maven.demo;

import org.dozer.Mapping;

public class ProductEntity {
    @Mapping("id")
    private long productId;
    
    @Mapping("name")
    private String productName;
    
    @Mapping("description")
    private String desc;
    
    public long getProductId() {
        return productId;
    }
    public void setProductId(long productId) {
        this.productId = productId;
    }
    public String getProductName() {
        return productName;
    }
    public void setProductName(String productName) {
        this.productName = productName;
    }
    public String getDesc() {
        return desc;
    }
    public void setDesc(String desc) {
        this.desc = desc;
    }
   
   
}

Dozer使用测试：

package com.maven.demo;

import java.util.HashMap;
import java.util.Map;

import org.dozer.DozerBeanMapper;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class Demo{

    
    /**
     * map->bean
     */
    @Test
    public void testDozer1() {
        Map<String,Object> map = new HashMap();
        map.put("id", 10000L);
        map.put("name", "小兵");
        map.put("description", "帅气逼人");
        DozerBeanMapper mapper = new DozerBeanMapper();
        ProductVO product = mapper.map(map, ProductVO.class);
        assertEquals("小兵",product.getName());
        assertEquals("帅气逼人",product.getDescription());
        assertEquals(Long.valueOf("10000"), product.getId());
    }
    

    /**
     * VO --> Entity  (不同的实体之间，不同的属性字段进行复制）
     */
    @Test
    public void testDozer2(){
          ProductVO product = new ProductVO();
          product.setId(10001L);
          product.setName("xiaobing");
          product.setDescription("酷毙了");
         
          DozerBeanMapper mapper = new DozerBeanMapper();
          ProductEntity productEntity = mapper.map(product, ProductEntity.class);
          assertEquals("xiaobing",productEntity.getProductName());
    }
    
}

 DozerProject.rar