通过Function获取属性对应字段

/**
 * 获取表内字段
 *
 * @param function 字段
 * @return java.lang.String
 * @author <achao1441470436@gmail.com>
 * @since 2021/6/29 16:51
 */
public static <R, T> String getColumn(SFunction<T, R> function) {
    SerializedLambda lambda = LambdaUtils.resolve(function);
    TableInfo tableInfo = TableInfoHelper.getTableInfo(lambda.getImplClass());
    return tableInfo.getFieldList()
            .parallelStream()
            .filter(filed -> PropertyNamer.methodToProperty(lambda.getImplMethodName()).equals(filed.getProperty()))
            .findFirst()
            .map(TableFieldInfo::getColumn)
            .orElseThrow(() -> new MybatisPlusException("未找到该字段"));
}

package com.ruben.simpleideaspringboot.dao;
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.ruben.simpleideaspringboot.pojo.po.User;
import org.apache.ibatis.annotations.Mapper;
/**
 * @author <achao1441470436@gmail.com>
 * @since 2021/5/15 0015 22:40
 */
@Mapper
public interface UserMapper extends BaseMapper<User> {
}

@Test
void testGetColumn() {
    System.out.println(getColumn(User::getUsername));
}