convert bean to another bean in java

DozerUtil

package net.aimeizi.util;

import java.util.Collection;
import java.util.List;

import org.dozer.DozerBeanMapper;

import com.google.common.collect.Lists;

/**
 * 简单封装Dozer, 实现深度转换Bean<->Bean的Mapper.实现:
 * 1. 持有Mapper的单例.
 * 2. 返回值类型转换.
 * 3. 批量转换Collection中的所有对象.
 * 4. 区分创建新的B对象与将对象A值复制到已存在的B对象两种函数.
 */
public class DozerUtil {

    /**
     * 持有Dozer单例, 避免重复创建DozerMapper消耗资源.
     */
    private static DozerBeanMapper dozer = new DozerBeanMapper();

    /**
     * 基于Dozer转换对象的类型.
     */
    public static <T> T map(Object source, Class<T> destinationClass) {
        return dozer.map(source, destinationClass);
    }

    /**
     * 基于Dozer转换Collection中对象的类型.
     */
    public static <T> List<T> mapList(@SuppressWarnings("rawtypes") Collection sourceList, Class<T> destinationClass) {
        List<T> destinationList = Lists.newArrayList();
        for (Object sourceObject : sourceList) {
            T destinationObject = dozer.map(sourceObject, destinationClass);
            destinationList.add(destinationObject);
        }
        return destinationList;
    }

    /**
     * 基于Dozer将对象A的值拷贝到对象B中.
     */
    public static void map(Object source, Object destinationObject) {
        dozer.map(source, destinationObject);
    }
}

OrikaUtil

package net.aimeizi.util;

import ma.glasnost.orika.MapperFacade;
import ma.glasnost.orika.MapperFactory;
import ma.glasnost.orika.impl.DefaultMapperFactory;

public class OrikaUtil {
    /**
     * 将source 转换成 destinationClass
     * @param sourceObject 源对象
     * @param destinationClass 目标类
     * @return
     */
    public static <T> T map(Object sourceObject, Class<T> destinationClass) {
        MapperFacade mapper = getMapper(sourceObject.getClass(), destinationClass);
        return mapper.map(sourceObject, destinationClass);
    }

    /**
     * 将source 转换成destinationObject
     * @param sourceObject 源对象
     * @param destinationObject 目标对象
     */
    public static void map(Object sourceObject, Object destinationObject) {
        MapperFacade mapper = getMapper(sourceObject.getClass(), destinationObject.getClass());
        mapper.map(sourceObject, destinationObject);
    }

    /**
     * 获得mapper
     * @param sourceClass 源类
     * @param destinationClass 目标类
     * @return
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static MapperFacade getMapper(Class sourceClass, Class destinationClass) {
        MapperFactory mapperFactory = new DefaultMapperFactory.Builder().build();
        mapperFactory.classMap(sourceClass, destinationClass).mapNulls(false).mapNullsInReverse(false).byDefault().register();
        return mapperFactory.getMapperFacade();
    }
}

http://blog.sokolenko.me/2013/05/dozer-vs-orika-vs-manual.html

v5tech / notes

convert bean to another bean in java #161