org.springframework.beans.BeanUtils#copyProperties(java.lang.Object, java.lang.Object)使用记录

属性类型必须一致，即使字段名称相同的情况下，也无法赋值。如：

package com.mbv.sc.midsvc.service.impl;

import lombok.Data;
import org.springframework.beans.BeanUtils;

import java.math.BigDecimal;

public class TestCopy {


    @Data
    static class A {
        private BigDecimal totalQty;
    }

    @Data
    static class B {
        private Integer totalQty;
    }

    public static void main(String[] args) {
        A a = new A();
        a.setTotalQty(new BigDecimal("6"));
        B b = new B();
        BeanUtils.copyProperties(a, b);
        //输出 TestCopy.B(totalQty=null)
        System.out.println(b);
    }
}