基于Spring Boot的研究生志愿填报辅助系统-CFANZ编程社区

前言

目前项目上扫描出一些 Java 依赖的代码漏洞，需要对现有依赖版本升级，记录一下遇到的问题。

<spring-boot.version>2.3.2.RELEASE</spring-boot.version>
<spring-cloud.version>Hoxton.SR9</spring-cloud.version>
<spring-cloud-alibaba.version>2.2.6.RELEASE</spring-cloud-alibaba.version>

升级到

<spring-boot.version>2.7.18</spring-boot.version>
<spring-cloud.version>2021.0.8</spring-cloud.version>
<spring-cloud-alibaba.version>2021.0.5.0</spring-cloud-alibaba.version>

2.7.18 版本的 Spring Boot 支持 JDK 8 ，再往后需要 JDK 17 了。
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启动报错记录

1. Nacos 字样报错信息

Add a spring.config.import=nacos: property to your configuration.
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解决方法，增加依赖

<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>

2. spring-data-commons 相关类找不到

org/springframework/data/repository/core/support/RepositoryMethodInvocationListener

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解决方法，增加依赖

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-commons</artifactId>
    <!--默认版本没效果2.7.18 可能是依赖下载问题-->
    <version>2.7.18</version>
</dependency>

3. 不再提供默认负载均衡

nested exception is java.lang.IllegalStateException: No Feign Client for loadBalancing defined. Did you forget to include spring-cloud-starter-loadbalancer?

<dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-loadbalancer</artifactId>
</dependency>

4. 默认不支持循环依赖

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.

解决，开启循环依赖

spring:
  main:
    allow-circular-references: true

5. thymeleaf 相关类找不到

java.lang.ClassNotFoundException: org.thymeleaf.util.VersionUtils
版本冲突导致，统一thymeleaf版本

6. swagger2 相关报错

Failed to start bean ‘documentationPluginsBootstrapper’; nested exception is java.lang.NullPointerException
Swagger2 bug导致
解决：增加配置

@Bean
public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
    return new BeanPostProcessor() {

        @Override
        public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
            if (bean instanceof WebMvcRequestHandlerProvider) {
                customizeSpringfoxHandlerMappings(getHandlerMappings(bean));
            }
            return bean;
        }

        private <T extends RequestMappingInfoHandlerMapping> void customizeSpringfoxHandlerMappings(List<T> mappings) {
            List<T> copy = mappings.stream()
            .filter(mapping -> mapping.getPatternParser() == null)
            .collect(Collectors.toList());
            mappings.clear();
            mappings.addAll(copy);
        }

        @SuppressWarnings("unchecked")
        private List<RequestMappingInfoHandlerMapping> getHandlerMappings(Object bean) {
            try {
                Field field = ReflectionUtils.findField(bean.getClass(), "handlerMappings");
                field.setAccessible(true);
                return (List<RequestMappingInfoHandlerMapping>) field.get(bean);
            } catch (IllegalArgumentException | IllegalAccessException e) {
                throw new IllegalStateException(e);
            }
        }
    };
}

配置过时

1. ResourceProperties

Spring Boot 2.4.0版本之后已作废，2.6.0版本被移除
org.springframework.boot.autoconfigure.web.ResourceProperties

2. StringUtils

commons-lang 升级到 commons-lang3

3. 单元测试注解

@BeforeEach 代替 @Before

4. 数组转集合

CollectionUtils.arrayToList(key)
替换为
Arrays.asList

5. Hystrix

Spring Cloud 2020 以后就不再支持 Hystrix
建议替换为 Sentinel。
仍要使用 Hystrix 的话，相关 yaml 配置和启用注解有变化。

Spring Security OAuth2

目前使用的版本是2.2.5，也是最后一个版本

<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-oauth2</artifactId>
   <version>2.2.5.RELEASE</version>
</dependency>