SpringBoot项目集成swagger报NumberFormatException: For input string: ""

java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) ~[?:1.8.0_242]

出现此错误，就是应该导入了多个版本的swagger依赖

<groupId>io.swagger</groupId>
  <artifactId>swagger-annotations</artifactId>

  <groupId>io.swagger</groupId>
  <artifactId>swagger-models</artifactId>

通过IDEA提供的依赖图查看，项目中存在 1.5.20版本和2.1.2版本，需要排除1.5.20版本的依赖；解决方法如下：替换swagger的依赖包即可

<dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-boot-starter</artifactId>
      <version>3.0.0</version>
      <exclusions>
        <exclusion>
          <artifactId>swagger-models</artifactId>
          <groupId>io.swagger</groupId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger-common</artifactId>
      <version>3.0.0</version>
      <exclusions>
        <exclusion>
          <groupId>io.swagger</groupId>
          <artifactId>swagger-annotations</artifactId>
        </exclusion>
        <exclusion>
          <groupId>io.swagger</groupId>
          <artifactId>swagger-models</artifactId>
        </exclusion>
      </exclusions>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger2</artifactId>
      <version>3.0.0</version>
      <scope>compile</scope>
      <exclusions>
        <exclusion>
          <groupId>io.swagger</groupId>
          <artifactId>swagger-annotations</artifactId>
        </exclusion>
        <exclusion>
          <groupId>io.swagger</groupId>
          <artifactId>swagger-models</artifactId>
        </exclusion>
      </exclusions>
    </dependency>

因为

springfox-boot-starter:3.0 依赖导入了2个版本，所以只需要把低版本排除即可