记录SpringBoot关于Swagger启动报错

某个SpringBoot项目启动报如下错误

java.lang.NullPointerException: null
	at springfox.documentation.schema.Example.equals(Example.java:131)
	at java.util.Objects.equals(Objects.java:59)
	at springfox.documentation.service.RequestParameter.equals(RequestParameter.java:132)
	at java.util.HashMap.putVal(HashMap.java:648)
	at java.util.HashMap.put(HashMap.java:612)
	at java.util.HashSet.add(HashSet.java:220)
	at java.util.stream.ReduceOps$3ReducingSink.accept(ReduceOps.java:169)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:175)
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at springfox.documentation.spring.web.readers.operation.OperationParameterReader.apply(OperationParameterReader.java:93)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsManager.operation(DocumentationPluginsManager.java:144)
	at springfox.documentation.spring.web.readers.operation.ApiOperationReader.read(ApiOperationReader.java:72)
	at springfox.documentation.spring.web.scanners.CachingOperationReader.lambda$new$0(CachingOperationReader.java:43)
	at java.util.HashMap.computeIfAbsent(HashMap.java:1127)
	at springfox.documentation.spring.web.scanners.CachingOperationReader.read(CachingOperationReader.java:48)
	at springfox.documentation.spring.web.scanners.ApiDescriptionReader.read(ApiDescriptionReader.java:72)
	at springfox.documentation.spring.web.scanners.ApiListingScanner.scan(ApiListingScanner.java:169)
	at springfox.documentation.spring.web.scanners.ApiDocumentationScanner.scan(ApiDocumentationScanner.java:67)
	at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.scanDocumentation(AbstractDocumentationPluginsBootstrapper.java:96)
	at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.bootstrapDocumentationPlugins(AbstractDocumentationPluginsBootstrapper.java:82)
	at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:100)
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:182)
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:53)
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:360)
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:158)
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:122)
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:895)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:554)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:405)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:315)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226)
	at com.worsoft.worsoft.fc.WorSoftPmFcApp.main(WorSoftPmFcApp.java:20)

原因是整合Swagger之后，Controller层某个接口接收了两个实体类，类的名称一样导致的，栗子：某个Controller中

@ApiOperation(value = "分页查询", notes = "分页查询")
@GetMapping("/page")
public R getPmFcPerformanceBondPage(PageDto page, PmFcPerformanceBond pmFcPerformanceBond, PmFcBidBond pmFcBidBond) {
   QueryWrapper<PmFcPerformanceBond> query = WrapperBuilder.generateQuery(pmFcPerformanceBond, page);
   return R.ok(pmFcPerformanceBondService.page((Page) page, query));
}

类PmFcPerformanceBond和PmFcBidBond两个中有相同的参数导致的。