Swagger2 reports an error illegal DefaultValue null for parameter type integer

1、 Error details

Development today , Automatically generated a lot javabean Code for , It contains swagger2 Annotations , As a result, the project is refreshed as soon as it starts swagger2 Just report a mistake java.lang.NumberFormatException: For input string: "", In fact, it has no impact on the use , But for obsessive-compulsive disorder, thieves are uncomfortable , Here is the error message ;

2022-07-05 14:24:53.538  WARN 55280 --- [nio-8888-exec-9] i.s.m.p.AbstractSerializableParameter    : Illegal DefaultValue null for parameter type integer

java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Long.parseLong(Long.java:601)
	at java.lang.Long.valueOf(Long.java:803)
	at io.swagger.models.parameters.AbstractSerializableParameter.getExample(AbstractSerializableParameter.java:412)
	at sun.reflect.GeneratedMethodAccessor86.invoke(Unknown Source)

2、 Cause analysis

There are a lot of specific reasons on the Internet , Let's not talk much , In fact, that is swagger2 Its own problems , It's not about code ;

3、 Solution

Since it is swagger2 Its own problems , Not optimized , The best way is to use the optimized swagger2, That is to say, it will cause errors jar The bags are replaced ：

used pom.xml file

<!-- swagger2 -->
<dependency>
	<groupId>io.springfox</groupId>
	<artifactId>springfox-swagger2</artifactId>
	<version>2.9.2</version>
</dependency>
<!-- swagger-ui -->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.9.2</version>
</dependency>

new pom.xml file

<!-- swagger2 -->
<dependency>
	<groupId>io.springfox</groupId>
	<artifactId>springfox-swagger2</artifactId>
	<version>2.9.2</version>
	<exclusions>
		<exclusion>
			<groupId>io.swagger</groupId>
			<artifactId>swagger-annotations</artifactId>
		</exclusion>
		<exclusion>
			<groupId>io.swagger</groupId>
			<artifactId>swagger-models</artifactId>
		</exclusion>
	</exclusions>
</dependency>
<!-- swagger-ui -->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.9.2</version>
</dependency>
<!--  solve swagger Report errors Illegal DefaultValue null for parameter type integer -->
<dependency>
	<groupId>io.swagger</groupId>
	<artifactId>swagger-annotations</artifactId>
	<version>1.5.22</version>
</dependency>
<dependency>
	<groupId>io.swagger</groupId>
	<artifactId>swagger-models</artifactId>
	<version>1.5.22</version>
</dependency>

PS: If it is replaced, an error will still be reported , Please re build、 Start and stop items 、 Clear cache 、MAVEN Build and so on , Because caching can lead to jar The package was not successfully replaced as desired , Don't ask me how I know ;