java 使用反射在dto和entity 實體類之間進行轉換

package com.example.demo.utils;

import java.lang.reflect.Method;
import java.util.List;

import com.example.demo.domain.Users;
import com.example.demo.model.UsersModel;

public class Dto2Entity {

    /**
     * 
     * 將dto和entity之間的屬性互相轉換,dto中屬性一般為String等基本類型,
     * 
     * 但是entity中可能有復合主鍵等復雜類型,需要注意同名問題
     * 
     * @param src
     * 
     * @param target
     */

    public static Object populate(Object src, Object target) {

        Method[] srcMethods = src.getClass().getMethods();

        Method[] targetMethods = target.getClass().getMethods();

        for (Method m : srcMethods) {

            String srcName = m.getName();

            if (srcName.startsWith("get")) {

                try {

                    Object result = m.invoke(src);

                    for (Method mm : targetMethods) {

                        String targetName = mm.getName();

                        if (targetName.startsWith("set")
                                && targetName.substring(3, targetName.length())

                                .equals(srcName.substring(3, srcName.length()))) {

                            mm.invoke(target, result);

                        }

                    }

                } catch (Exception e) {

                }

            }

        }

        return target;

    }

    /**
     * 
     * dto集合和實體類集合間的互相屬性映射
     * 
     * @param src
     * 
     * @param target
     * 
     * @param targetClass
     * 
     * @return
     */

    @SuppressWarnings("unchecked")
    public static <S, T> List<T> populateList(List<S> src, List<T> target,
            Class<?> targetClass) {

        for (int i = 0; i < src.size(); i++) {

            try {

                Object object = targetClass.newInstance();

                target.add((T) object);

                populate(src.get(i), object);

            } catch (Exception e) {

                continue;// 某個方法反射異常

            }

        }

        return target;

    }
    
    public static void main(String[] args) {
        Users users = new Users();
        users.setId(1);
        users.setUsername("huang");
        users.setPassword("123456");
        UsersModel usersModel = new UsersModel();
        usersModel = (UsersModel) Dto2Entity.populate(users,usersModel);
        System.out.println(usersModel.toString());
    }

}