swagger主页访问报错500

清疚 2023-10-09 14:49 50阅读 0赞

#### **背景：** ####

有一天前端给我要接口文档，我给发了个接口文档路径，结果直接报错500，截图如下：

![72b1c7c912ed47d7907ecd3655f8ca24.png][]

#### **原因分析：** ####

500报错，看后台日志

java.lang.NullPointerException: null
    	at springfox.documentation.swagger2.mappers.RequestParameterMapper.bodyParameter(RequestParameterMapper.java:264)
    	at springfox.documentation.swagger2.mappers.RequestParameterMapper.mapParameter(RequestParameterMapper.java:149)
    	at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.beforeMappingOperations(ServiceModelToSwagger2Mapper.java:125)
    	at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2MapperImpl.mapOperation(ServiceModelToSwagger2MapperImpl.java:109)
    	at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.mapOperations(ServiceModelToSwagger2Mapper.java:270)
    	at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.lambda$mapApiListings$2(ServiceModelToSwagger2Mapper.java:258)
    	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
    	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
    	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
    	at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270)
    	at java.util.TreeMap$ValueSpliterator.forEachRemaining(TreeMap.java:2897)
    	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
    	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
    	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
    	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
    	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    	at java.util.stream.ReferencePipeline.forEachOrdered(ReferencePipeline.java:423)
    	at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.mapApiListings(ServiceModelToSwagger2Mapper.java:253)
    	at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2MapperImpl.mapDocumentation(ServiceModelToSwagger2MapperImpl.java:48)
    	at springfox.documentation.swagger2.web.Swagger2ControllerWebMvc.getDocumentation(Swagger2ControllerWebMvc.j

这个问题找起来，比较麻烦，需要你debug看下swagger源码，最后会找到报错的[swagger][]注解类，基本上都是注解使用错误，我这边的问题是参数是个数不对，少写了三个，导致swagger报空指针

![9cee9fdf573544a68837f33f935c4fed.png][]

[72b1c7c912ed47d7907ecd3655f8ca24.png]: https://img-blog.csdnimg.cn/72b1c7c912ed47d7907ecd3655f8ca24.png
[swagger]: https://so.csdn.net/so/search?q=swagger&spm=1001.2101.3001.7020
[9cee9fdf573544a68837f33f935c4fed.png]: https://img-blog.csdnimg.cn/9cee9fdf573544a68837f33f935c4fed.png