2019.6.8错误记录：SpringBoot用了@SpringBootApplication却扫不到包 & Type javax.xml.bind.JAXBContext not present

本文链接：https://blog.youkuaiyun.com/qq_38892496/article/details/91347295

本文解析了SpringBoot中使用@SpringBootApplication注解时的包扫描机制，并提供了解决包扫描不全的方法。同时，针对高版本JDK不默认装配JAXB的问题，给出了不同SpringBoot版本下JAXB依赖的引入方案。

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SpringBoot用了@SpringBootApplication却扫不到包

以为用了@SpringBootApplication就可以不写扫包了，没想到@SpringBootApplication只默认扫描该类包

就该早点看源码，还倒腾了好久

解决方法：

如果App类不跟Controller类一起，还是的加扫包

要么加：@ComponentScan("com.ymk.api.controller")

要么：@SpringBootApplication(scanBasePackages = "com.ymk.api.controller")

Type javax.xml.bind.JAXBContext not present

JDK版本太高了，高版本JDK默认不装配JAXB

解决方法：

原文：https://blog.youkuaiyun.com/alger_magic/article/details/83041811

手动加包

SpringBoot 1.5

<!-- Java 6 = JAX-B Version 2.0   -->
<!-- Java 7 = JAX-B Version 2.2.3 -->
<!-- Java 8 = JAX-B Version 2.2.8 -->
<dependency>
    <groupId>javax.xml.bind</groupId>
    <artifactId>jaxb-api</artifactId>
    <version>2.2.11</version>
</dependency>
<dependency>
    <groupId>com.sun.xml.bind</groupId>
    <artifactId>jaxb-core</artifactId>
    <version>2.2.11</version>
</dependency>
<dependency>
    <groupId>com.sun.xml.bind</groupId>
    <artifactId>jaxb-impl</artifactId>
    <version>2.2.11</version>
</dependency>
<dependency>
    <groupId>javax.activation</groupId>
    <artifactId>activation</artifactId>
    <version>1.1.1</version>
</dependency>

SpringBoot 2.0

		<!-- jaxb模块引用 - start -->
		<dependency>
		   <groupId>javax.xml.bind</groupId>
		    <artifactId>jaxb-api</artifactId>
		</dependency>
		<dependency>
		    <groupId>com.sun.xml.bind</groupId>
		    <artifactId>jaxb-impl</artifactId>
		    <version>2.3.0</version>
		</dependency>
		<dependency>
		    <groupId>org.glassfish.jaxb</groupId>
		    <artifactId>jaxb-runtime</artifactId>
		    <version>2.3.0</version>
		</dependency> 
		<dependency>
		    <groupId>javax.activation</groupId>
		    <artifactId>activation</artifactId>
		    <version>1.1.1</version>
		</dependency>
		<!-- jaxb模块引用 - end -->