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Spring boot项目,使用dozer将Jpa Entity中的LocalDateTime属性转到DTO中对应的LocalDateTime属性中报错
java.lang.NoSuchMethodException: java.time.LocalDateTime.<init>() at java.lang.Class.getConstructor0(Class.java:3082) ~[na:1.8.0_51] at java.lang.Class.getDeclaredConstructor(Class.java:2178) ~[na:1.8.0_51] at org.dozer.factory.ConstructionStrategies$ByConstructor.newInstance(ConstructionStrategies.java:272) ~[dozer-5.5.1.jar:na]
将DTO中的LocalDateTime换成Date又报错
java.lang.NumberFormatException: For input string: "2015-10-17T17:55:12.091"
解决方法:
添加一个自定义Convert
public class LocalDateTimeToDateDozerConverter extends DozerConverter<LocalDateTime, Date> { public LocalDateTimeToDateDozerConverter() { super(LocalDateTime.class, Date.class); } @Override public LocalDateTime convertFrom(Date source, LocalDateTime destination) { LocalDateTime dateTime = LocalDateTime.ofInstant(source.toInstant(), ZoneId.systemDefault()); return dateTime; } @Override public Date convertTo(LocalDateTime source, Date destination) { Date convertToDate = Date.from(source.atZone(ZoneId.systemDefault()).toInstant()); return convertToDate; } }
在类路径下添加一个xml配置文件
<?xml version="1.0" encoding="UTF-8"?> <mappings xmlns="http://dozer.sourceforge.net" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://dozer.sourceforge.net http://dozer.sourceforge.net/schema/beanmapping.xsd"> <configuration> <custom-converters> <!-- these are always bi-directional --> <converter type="com.demo.LocalDateTimeToDateDozerConverter" > <class-a>java.time.LocalDateTime</class-a> <class-b>java.util.Date</class-b> </converter> </custom-converters> </configuration> </mappings>
注意像这样的全局配置只能使用xml的形式配置,见官方文档
In fact some parts of the configuration (e.g. global configuration block) are only possible to express in Xml format.
Spring boot启动类中添加如下配置
@Bean public Mapper dozerBeanMapper() { List<String> mappingFileUrls = Lists.newArrayList("dozer-custom-convert.xml"); DozerBeanMapper mapper = getSingletonDozerBeanMapper(); mapper.setMappingFiles(mappingFileUrls); return mapper; }
参考文档
http://dozer.sourceforge.net/documentation/customconverter.html
http://stackoverflow.com/questions/29550417/why-dozerconverter-is-not-working
Dozer 自定义Converter -- LocalDateTime to Date
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原文地址:http://my.oschina.net/zhuguowei/blog/521869