单位转换工具类

- 1. 工具类转换
- - - 定义装换枚举转换类型
  - - 创建转换工具类,
  - - 1. 通过反射去除字段,
    - 2.对照传入map标记的字段需要转换的类型转换
    - 3. 重新赋值
- 2. 注解转换
- - - 定义注解
  - - 解析注解

1. 工具类转换

- 定义装换枚举转换类型

public enum UnitConvertType {/*** 精确度*/ACCURACY,/*** 万元*/TEN_THOUSAND_YUAN,/*** 百分比*/PERCENTAGE,/*** 千分比*/PERMIL;}

- 创建转换工具类,

1. 通过反射去除字段,

2.对照传入map标记的字段需要转换的类型转换

3. 重新赋值

@Slf4j
public class UnitConvertUtil {public static <T> void unitMapConvert(List<T> list, Map<String, UnitConvertType> propertyMap){list.forEach(item -> {//获取所有属性Field[] fields = item.getClass().getDeclaredFields();for (Field field : fields) {if(propertyMap.containsKey(field.getName())){try {//设置属性可访问field.setAccessible(true);//获取属性值Object value = field.get(item);UnitConvertType unitConvertType = propertyMap.get(field.getName());if(value != null){BigDecimal bigDecimal;if(unitConvertType == UnitConvertType.PERCENTAGE){bigDecimal = ((BigDecimal) value).multiply(BigDecimal.valueOf(100));field.set(item,bigDecimal);}else if(unitConvertType == UnitConvertType.PERMIL){bigDecimal = ((BigDecimal) value).multiply(BigDecimal.valueOf(1000));field.set(item,bigDecimal);}else if(unitConvertType == UnitConvertType.TEN_THOUSAND_YUAN){bigDecimal = ((BigDecimal) value).divide(BigDecimal.valueOf(10000)).setScale(2, RoundingMode.HALF_UP);field.set(item,bigDecimal);}else if(unitConvertType == UnitConvertType.ACCURACY){bigDecimal = ((BigDecimal) value).setScale(2, RoundingMode.HALF_UP);field.set(item,bigDecimal);}else{log.error("未知的单位转换类型");}}}catch (Exception e){log.error("属性转换失败",e);}}}});}public static void main(String[] args) {SumReport sumReport = new SumReport();sumReport.setPayTotalAmount(new BigDecimal(2390000));sumReport.setJcAmountPer(BigDecimal.valueOf(0.885));sumReport.setJcCountPer(BigDecimal.valueOf(0.2394));sumReport.setLength(BigDecimal.valueOf(1700.64003));List<SumReport> list = new ArrayList<>();list.add(sumReport);Map<String, UnitConvertType> map =new HashMap<>();map.put("payTotalAmount", UnitConvertType.TEN_THOUSAND_YUAN);map.put("jcAmountPer", UnitConvertType.PERCENTAGE);map.put("jcCountPer", UnitConvertType.PERMIL);map.put("length", UnitConvertType.ACCURACY);unitMapConvert(list,map);System.out.println(list);}
}

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2. 注解转换

- 定义注解

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface UnitBigDecConvert {UnitConvertType name();
}

- 解析注解

public static <T> void unitAnnotationConvert(List<T> list){list.forEach(item -> {Field[] fields = item.getClass().getDeclaredFields();for (Field field : fields) {try {//获取注解UnitBigDecConvert annotation = field.getAnnotation(UnitBigDecConvert.class);if(annotation == null){continue;}UnitConvertType name = annotation.name();field.setAccessible(true);Object o = field.get(item);if(o != null){if(name == UnitConvertType.PERCENTAGE){BigDecimal bigDecimal = ((BigDecimal) o).multiply(BigDecimal.valueOf(100));field.set(item,bigDecimal);}else if(name == UnitConvertType.PERMIL){BigDecimal bigDecimal = ((BigDecimal) o).multiply(BigDecimal.valueOf(1000));field.set(item,bigDecimal);}else if(name == UnitConvertType.TEN_THOUSAND_YUAN){BigDecimal bigDecimal = ((BigDecimal) o).divide(BigDecimal.valueOf(10000)).setScale(2, RoundingMode.HALF_UP);field.set(item,bigDecimal);}else if (name == UnitConvertType.ACCURACY){BigDecimal bigDecimal = ((BigDecimal) o).setScale(2, RoundingMode.HALF_UP);field.set(item,bigDecimal);}else {log.error("未知的单位转换类型");}}} catch (IllegalAccessException e) {log.error("装换失败",e);}}});}public static void main(String[] args) {SumReport sumReport = new SumReport();sumReport.setPayTotalAmount(new BigDecimal(2390000));sumReport.setJcAmountPer(BigDecimal.valueOf(0.885));sumReport.setJcCountPer(BigDecimal.valueOf(0.2394));sumReport.setLength(BigDecimal.valueOf(1700.64003));List<SumReport> list = new ArrayList<>();list.add(sumReport);unitAnnotationConvert(list);System.out.println(list);}