spring 中 PO與DTO相互轉換的工具類

public class BeanMapper {

    /**
     * 持有Dozer單例, 避免重復創建DozerMapper消耗資源.
     */
    private static DozerBeanMapper dozer = new DozerBeanMapper();

    /**
     * 基於Dozer轉換對象的類型.
     */
    public static <T> T map(Object source, Class<T> destinationClass) {
        return dozer.map(source, destinationClass);
    }

    /**
     * 基於Dozer轉換Collection中對象的類型.
     */
    public static <T> List<T> mapList(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;
    }

    /**
     * 基於Dozer將對象A的值拷貝到對象B中.
     */
    public static void copy(Object source, Object destinationObject) {
        dozer.map(source, destinationObject);
    }
}

 

//清晰版
import java.util.Collection;
import java.util.List;
import org.dozer.DozerBeanMapper;
import com.google.common.collect.Lists;

public class BeanMapper {

    
    private static DozerBeanMapper dozer = new DozerBeanMapper();

    public static <T> T map(Object source, Class<T> destinationClass) {
        return dozer.map(source, destinationClass);
    }

    public static <T> List<T> mapList(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;
    }
    
    public static void copy(Object source, Object destinationObject) {
        dozer.map(source, destinationObject);
    }
}