反射实现属性赋值

1.原值对象

@Getter
@Setter
@ToString
public class UserDTO implements Serializable {

    /**
     * 用户id
     */
    private Integer userId;

    /**
     * 用户姓名
     */
    private String firstName;

    /**
     * 用户手机号
     */
    private String mobile;
}

2.赋值接受对象

@Getter
@Setter
@ToString
public class PaymentsRollDO implements Serializable{
    /**
     * 业务ID
     */
    @ApiModelProperty("业绩id")
    @NotNull
    private Integer id;


    /**
     * 销售ID
     */
    private Integer selUserId;

    
    /**
     * 销售手机号
     */
    private String sellerMobile;

    /**
     * 销售姓名
     */
    private String sellerName;


}

3.转换工具类

public final class UserConvertUtil {

    /**
     * Desc:
     * 反射赋值
     * @author wei9.wang
     * @date 2020/3/14 19:12
     **/
    static <T> void  deal(List<UserDTO> users, List<T> list, String id, String firstName, String mobile){
        if(CollectionUtils.isEmpty(list)){
            return;
        }
        Field[] declaredFields = list.get(0).getClass().getDeclaredFields();
        Field userIdField = null;
        Field mobileField = null;
        Field firstNameField = null;
        for (Field field : declaredFields) {
            String fieldName = field.getName();
            if (fieldName.equals(id)) {
                userIdField = field;
                userIdField.setAccessible(true);
            }else if (fieldName.equals(firstName)) {
                firstNameField = field;
                firstNameField.setAccessible(true);
            }else if (fieldName.equals(mobile)) {
                mobileField = field;
                mobileField.setAccessible(true);
            }
        }

        if(userIdField == null){
            throw new RuntimeException("用户id字段不能为null");
        }

        try {
            for (T t : list) {
                Integer userId = (Integer) userIdField.get(t);
                for (UserDTO user : users) {
                    if(user.getUserId().equals(userId)){
                        if(mobileField != null){
                            mobileField.set(t, user.getMobile());
                        }
                        if(firstNameField != null){
                            firstNameField.set(t, user.getFirstName());
                        }

                    }
                }
            }
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }

}

4.Test测试类

import com.zhangmen.sale.score.feign.dto.UserDTO;
import com.zhangmen.sale.score.service.impl.entity.PaymentsRollDO;

import java.util.ArrayList;
import java.util.List;

/**
 *@ClassName Test
 *@Description
 *@Author wangwei
 *@Date 2020/3/14 18:06
 *@Version V1.0
 **/
public class Test {
    public static void main(String[] args) {
        List<UserDTO> users = new ArrayList<>();
        UserDTO u1 = new UserDTO();
        u1.setUserId(1);
        u1.setFirstName("王未");
        u1.setMobile("18222255422");
        UserDTO u2 = new UserDTO();
        u2.setUserId(2);
        u2.setFirstName("星星");
        u2.setMobile("15236265722");
        UserDTO u3 = new UserDTO();
        u3.setUserId(3);
        u3.setFirstName("月亮");
        u3.setMobile("15236265786");
        users.add(u1);
        users.add(u2);
        users.add(u3);
        List<PaymentsRollDO> paymentsRollDOS = new ArrayList<>();
        PaymentsRollDO p1 = new PaymentsRollDO();
        p1.setSelUserId(1);
        /*p1.setSellerName();
        p1.setSellerMobile();*/
        PaymentsRollDO p2 = new PaymentsRollDO();
        p2.setSelUserId(2);
        PaymentsRollDO p3 = new PaymentsRollDO();
        p3.setSelUserId(3);
        paymentsRollDOS.add(p1);
        paymentsRollDOS.add(p2);
        paymentsRollDOS.add(p3);
        UserConvertUtil.deal(users, paymentsRollDOS,"selUserId","sellerName","sellerMobile");
        for (PaymentsRollDO p : paymentsRollDOS) {
            System.out.println(p.getSelUserId()+"|"+p.getSellerName()+"|"+p.getSellerMobile()+"|");
        }
    }
}

输出结果：