SpringBoot 2.18升级到2.7.5, 踩到的坑

系统要求：

jdk 8~19

---

1，mybatis 实体注解失败，

相应maven添加

<dependency>
 <groupId>javax.validationgroupId> 
<artifactId>validation-apiartifactId> 
<version>2.0.1.Finalversion> 
<scope>compilescope> 
dependency>

mybatis-spring-boot-starter 升级到2.2.2

com.github.pagehelper 升级 1.4.4

org.apache.shiro 升级 1.10.0

2，MultipartProperties 中 文件大小 的后缀，只识别大写

org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException

at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181)

at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54)

at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356)

at java.base/java.lang.Iterable.forEach(Iterable.java:75)

3，swagger 升级

<dependency> 
<groupId>io.springfoxgroupId> 
<artifactId>springfox-swagger2artifactId> 
<version>3.0.0version> 
<scope>compilescope> 
dependency> 
 
<dependency> 
<groupId>io.springfoxgroupId> 
<artifactId>springfox-swagger-uiartifactId> 
<version>3.0.0version> 
<scope>compilescope> 
dependency>

Springfox使用的路径匹配是基于AntPathMatcher的，而Spring Boot 2.6.X使用的是PathPatternMatcher，增加mvc配置，

spring:
    mvc:
      pathmatch:
        matching-strategy: ant_path_matcher

访问：http:/127.0.0.1/swagger-ui/index.html

注：swagger2的访问地址：是http:/127.0.0.1/swagger-ui.html

4，升级 shardingsphere

<dependency>
    <groupId>org.apache.shardingspheregroupId>
    <artifactId>sharding-jdbc-spring-boot-starterartifactId>
    <version>4.1.1version>
dependency>
 
<dependency>
    <groupId>org.apache.shardingspheregroupId>
    <artifactId>sharding-jdbc-spring-namespaceartifactId>
    <version>4.1.1version>
dependency>

5，spring.rabbitmq.publisher-confirms Deprecated

替换成：spring.rabbitmq.publisher-confirm-type=correlated

6，yml配置文件更改

Property 'spring.profiles.include[0]' imported from location 'class path resource [application-prod.yml]' is invalid in a profile specific resource [origin: class path resource [application-prod.yml] -

include不能单独使用 

spring:
  config:
    import: application-common-prod.yml

7，升级 elasticsearch

<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-data-elasticsearchartifactId>
dependency>

报错：

Factory method 'esClient' threw exception; nested exception is java.lang.NoClassDefFoundError: jakarta/json/spi/JsonProvider

解决方案：

父模块添加声明依赖

<dependency>
<groupId>jakarta.jsongroupId>
<artifactId>jakarta.json-apiartifactId>
<version>2.0.1version>
dependency>

8，升级后 ，屏蔽 自带的tomcat , 使用 undertow

<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-webartifactId>
    <exclusions>
        
        <exclusion>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-tomcatartifactId>
        exclusion>
    exclusions>
dependency>
 
<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-undertowartifactId>
dependency>

 9，升级后 监听器使用@ConfigurationProperties(prefix="website")，报空指针

没找到具体原因，

猜测可能是加载顺序的问题，监听器在springboot容器外，可能是监听器加载时，springboot没有加载完，导致空指针异常。

后来直接在监听器中使用@Value注入资源文件属性，打印俩次日志，第一次时空数据，第二次数据加载，可能还是容器外管理的问题，加载顺序不一致导致的。

暂时得到解决，后面再找具体原因，如果有知道的也可以评论栏给下提示，万分感谢