主动类型转换

ABILI .2026-05-10 11:59

遇到的问题: 做页面数据导入时,有日期字段,因为导入类的日期用的string接收,但是我转换实体类准备入库的时候,实体类字段类型是Date,无法转换成功,数据丢失

如果正常用BeanUtils.copyProperties(importData, data);是没法转成功的

只能单独针对日期字段做类型转换

应对这种情况,可以走以下2种方式

第一种方式: 手写工具类

java 复制代码

public static void copyAndConvertDates(Object source, Object target, String... dateFieldNames) {
    BeanUtils.copyProperties(source, target);
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    for (String fieldName : dateFieldNames) {
        try {
            Field srcField = source.getClass().getDeclaredField(fieldName);
            Field tgtField = target.getClass().getDeclaredField(fieldName);
            srcField.setAccessible(true);
            tgtField.setAccessible(true);
            String dateStr = (String) srcField.get(source);
            if (dateStr != null && !dateStr.isEmpty()) {
                Date date = sdf.parse(dateStr);
                tgtField.set(target, date);
            }
        } catch (Exception e) {
            // 忽略或日志
        }
    }
}


//调用:
String[] dateFields = {"planStop","actualStop","planRepair","actualRepair","planWait","actualWait","planDrive","actualDrive","planCompletion","actualCompletion"};
copyAndConvertDates(importData, entity, dateFields);

但是如果字段太多,也感觉比较麻烦,而且容易写错

第二种方式: 引入ModelMapper

maven加入依赖

java 复制代码

// maven加入依赖
        <dependency>
            <groupId>org.modelmapper</groupId>
            <artifactId>modelmapper</artifactId>
            <version>3.2.0</version>
        </dependency>

将对象丢给spring管理

java 复制代码

@Configuration
public class ModelMapperConfig {
    @Bean
    public ModelMapper modelMapper() {
        return new ModelMapper();
    }
}

应用

java 复制代码

@Autowired
private ModelMapper modelMapper;

modelMapper.map(importData, data);