-1

回答4


public static  T nullAndEmptyToDefault(T bean) {
        return BeanUtil.edit(bean, field -> {
            if (String.class.equals(field.getType())) {
                String fieldValue = (String) ReflectUtil.getFieldValue(bean, field);
                if (StringUtils.isEmpty(fieldValue)) {
                    ReflectUtil.setFieldValue(bean, field, "-");
                }
            }

            if (List.class.equals(field.getType())) {
                List fieldValue = (List) ReflectUtil.getFieldValue(bean, field);
                if (fieldValue == null) {
                    ReflectUtil.setFieldValue(bean, field, new ArrayList());
                }
            }
            return field;
        });
    }

借助了hutool工具类

1年前

骰子0


import org.springframework.cglib.beans.BeanCopier;
import org.springframework.cglib.core.Converter;

/**
 * 实体工具类
 */
public class BeanUtil2 {

    /**
     * 拷贝对象
     *
     * @param source     源对象
     * @param targetBean 需要赋值的对象
     */
    public static void copy(Object source, Object targetBean) {
        BeanCopier copier = BeanCopier
                .create(source.getClass(), targetBean.getClass(), false);

        copier.copy(source, targetBean, null);
    }

    /**
     * 拷贝对象，会把String=""转为null
     *
     * @param source     源对象
     * @param targetBean 需要赋值的对象
     */
    public static void copy2null(Object source, Object targetBean) {
        BeanCopier copier = BeanCopier
                .create(source.getClass(), targetBean.getClass(), true);

        copier.copy(source, targetBean, new Converter() {
            @Override
            public Object convert(Object o, Class aClass, Object o1) {
                if(o instanceof String){
                    if(StringUtil.isBlank(o.toString())){
                        return null;
                    }
                }
                return o;
            }
        });
    }

    /**
     * 拷贝对象，会把String为空转为-
     *
     * @param source     源对象
     * @param targetBean 需要赋值的对象
     */
    public static void copy2(Object source, Object targetBean) {
        BeanCopier copier = BeanCopier
                .create(source.getClass(), targetBean.getClass(), true);

        copier.copy(source, targetBean, new Converter() {
            @Override
            public Object convert(Object o, Class aClass, Object o1) {
                if(aClass.getName().equals("java.lang.String") && o == null){
                    return "-";
                }
                if(o instanceof String && StringUtil.isBlank(o.toString())){
                    return "-";
                }
                return o;
            }
        });
    }


}

1年前