SpringBoot3新特性

最新推荐文章于 2025-03-03 22:46:36 发布

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最新推荐文章于 2025-03-03 22:46:36 发布

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分类专栏： SpringBoot 文章标签： SpringBoot3 SpringBoot3新特性新特性

本文链接：https://blog.youkuaiyun.com/u011069294/article/details/134429925

本篇文章参考尚硅谷springboot3课程: https://www.bilibili.com/video/BV1Es4y1q7Bf?p=94&vd_source=d6deb2b69988de2ae72087817e5143d7
原版笔记:
https://www.yuque.com/leifengyang/springboot3/xy9gqc2ezocvz4wn

1.自动配置包位置变化

现在指定自动配置类放在了下面这个AutoConfiguration.imports文件里面:
META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports
springboot2是放在:
META-INF/spring.factories

2.Java EE API 迁移到 Jakarta EE变体

Spring Boot 3已经将所有Java EE API迁移到其等效的Jakarta EE变体，对于大多数用户来说，这意味着需要将任何javax导入替换为jakarta。例如：javax.servlet.Filter 将被替换为 jakarta.servlet.Filter.

3.新特性 - ProblemDetails、函数式Web

ProblemDetails: 定义新的错误信息返回格式
遵循RFC 7807: https://www.rfc-editor.org/rfc/rfc7807

problemdetails默认是关闭的，可以在application.properties里面打开:
spring.mvc.problemdetails.enabled=true

原理:
WebMvcAutoConfiguration 里面定义了–> ProblemDetailsErrorHandlingConfiguration里面又返回了 --> ProblemDetailsExceptionHandler

@Configuration(proxyBeanMethods = false)
//配置过一个属性 spring.mvc.problemdetails.enabled=true, 才生效
@ConditionalOnProperty(prefix = "spring.mvc.problemdetails", name = "enabled", havingValue = "true")
static class ProblemDetailsErrorHandlingConfiguration {
   
   

    @Bean
    @ConditionalOnMissingBean(ResponseEntityExceptionHandler.class)
    ProblemDetailsExceptionHandler problemDetailsExceptionHandler() {
   
   
        return new ProblemDetailsExceptionHandler();
    }

}

1）ProblemDetailsExceptionHandler 是一个 @ControllerAdvice集中处理系统异常
2）它会处理以下异常。如果系统出现以下异常，会被SpringBoot支持以 RFC 7807规范方式返回错误数据

@ExceptionHandler({
   
   
        HttpRequestMethodNotSupportedException.class, //请求方式不支持
        HttpMediaTypeNotSupportedException.class,
        HttpMediaTypeNotAcceptableException.class,
        MissingPathVariableException.class,
        MissingServletRequestParameterException.class,
        MissingServletRequestPartException.class,
        ServletRequestBindingException.class,
        MethodArgumentNotValidException.class,
        NoHandlerFoundException.class,
        AsyncRequestTimeoutException.class,
        ErrorResponseException.class,
        ConversionNotSupportedException.class,