与spring-boot-devtools相关的类加载器问题 [英] A classloader proplem related to spring-boot-devtools
问题描述
背景:
春季启动项目,添加商品和商品价格清单
Background: Spring boot project, add goods and goods price list
Goods:
List<GoodsPrice> pricelist;
在控制器中先将商品表格转换为商品(由推土机),然后保存商品,在保存商品之后对商品进行迭代
in controller first convert goodsForm to goods(by dozer), then save goods,after saving goods iterate goods price list to populate goodsId.
goods.getPriceList().forEach(p -> p.setGoodsId(goods.getId()));
在迭代商品价格表时,引发异常:
When iterate goods price list, throw exception:
java.lang.ClassCastException: com.foo.goods.model.GoodsPrice cannot be cast to com.foo.goods.model.GoodsPrice
at com.foo.goods.service.GoodsService$$Lambda$11/310447431.accept(Unknown Source) ~[na:na]
at java.util.ArrayList.forEach(ArrayList.java:1249) ~[na:1.8.0_51]
at com.foo.goods.service.GoodsService.saveGoods(GoodsService.java:34) ~[classes/:na]
有人提醒我这个与类加载器有关的异常,在日食调试模式下,我输出了GoodsPrice的ClassLoader:
Somebody remind me this exception related to classloader, and in eclipse debug mode, I outputed the GoodsPrice's ClassLoader:
sun.misc.Launcher$AppClassLoader@14dad5dc
和商品:
org.springframework.boot.devtools.restart.classloader.RestartClassLoader@591c6338
确实存在差异类加载器。
然后我评论了 spring-boot-devtools
,然后再次尝试就可以了。
那么,如果仍然保留 spring-boot-devtools
,该如何解决呢?
Indeed exist diff classloader.
Then I commented spring-boot-devtools
then tried again this time it's ok.
So if still retain spring-boot-devtools
, how to solve this problem?
推荐答案
推土机使用了错误的类加载器。
您可以解决该问题,并将此文件添加到资源文件夹中:
META-INF / spring-devtools.properties
,内部:
restart.include.dozer = / dozer-5.5.1 .jar
restart.include.dozer-spring = / dozer-spring-5.5.1.jar(仅当您使用此jar时!)
来源: http: //docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#using-boot-devtools-customizing-classload
Dozer is using the wrong classloader.
You can solve it adding this file in your resource folder :
META-INF/spring-devtools.properties
with inside :
restart.include.dozer=/dozer-5.5.1.jar
restart.include.dozer-spring=/dozer-spring-5.5.1.jar (only if you use this jar!)
sources : http://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#using-boot-devtools-customizing-classload
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