spring boot项目 maven项目导入eclipse自动maven update 后jre不是1.8而是1.6解决办法

男娘i 2021-09-26 05:10 294阅读 0赞

### spring boot项目 maven项目导入eclipse自动maven update 后jre不是1.8而是1.6解决办法 ###

在学习spring boot的时候遇到一个问题，我们知道spring boot使用依赖比较新，官方使用jdk基本是1.8。  
在用eclipse开发的时候，每次maven update项目导入的jdk都是1.6，虽然默认的工作空间是1.8。有时候项目并没有报错，然后启动项目时候这样会造成启动报错如下:

.   ____          _            __ _ _
     /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
     \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
      '  |____| .__|_| |_|_| |_\__, | / / / /
     =========|_|==============|___/=/_/_/_/
     :: Spring Boot ::        (v1.4.1.RELEASE)
    
    2017-05-21 16:43:51.722  WARN 8924 --- [  restartedMain] o.s.boot.SpringApplication               : Error handling failed (no error message)
    2017-05-21 16:43:51.742 ERROR 8924 --- [  restartedMain] o.s.boot.SpringApplication               : Application startup failed
    
    java.lang.UnsupportedClassVersionError: javax/annotation/ManagedBean : Unsupported major.minor version 51.0
    	at java.lang.ClassLoader.defineClass1(Native Method) ~[na:1.6.0_14]
    	at java.lang.ClassLoader.defineClass(Unknown Source) ~[na:1.6.0_14]
    	at java.security.SecureClassLoader.defineClass(Unknown Source) ~[na:1.6.0_14]
    	at java.net.URLClassLoader.defineClass(Unknown Source) ~[na:1.6.0_14]
    	at java.net.URLClassLoader.access$000(Unknown Source) ~[na:1.6.0_14]
    	at java.net.URLClassLoader$1.run(Unknown Source) ~[na:1.6.0_14]
    	at java.security.AccessController.doPrivileged(Native Method) ~[na:1.6.0_14]
    	at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.6.0_14]
    	at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.6.0_14]
    	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.6.0_14]
    	at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.6.0_14]
    	at org.springframework.util.ClassUtils.forName(ClassUtils.java:250) ~[spring-core-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.registerDefaultFilters(ClassPathScanningCandidateComponentProvider.java:243) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.<init>(ClassPathScanningCandidateComponentProvider.java:116) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.<init>(ClassPathBeanDefinitionScanner.java:136) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.<init>(ClassPathBeanDefinitionScanner.java:111) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.<init>(ClassPathBeanDefinitionScanner.java:83) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:62) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.6.0_14]
    	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) ~[na:1.6.0_14]
    	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) ~[na:1.6.0_14]
    	at java.lang.reflect.Constructor.newInstance(Unknown Source) ~[na:1.6.0_14]
    	at java.lang.Class.newInstance0(Unknown Source) ~[na:1.6.0_14]
    	at java.lang.Class.newInstance(Unknown Source) ~[na:1.6.0_14]
    	at org.springframework.beans.BeanUtils.instantiate(BeanUtils.java:77) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    	at org.springframework.boot.SpringApplication.createApplicationContext(SpringApplication.java:597) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
    	at org.springframework.boot.SpringApplication.run(SpringApplication.java:311) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
    	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1186) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
    	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1175) [spring-boot-1.4.1.RELEASE.jar:1.4.1.RELEASE]
    	at com.yf.springboot.Application.main(Application.java:82) [classes/:na]
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_14]
    	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.6.0_14]
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.6.0_14]
    	at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.6.0_14]
    	at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-1.4.1.RELEASE.jar:1.4.1.RELEASE]

### 解决办法 ###

经过查阅资料，需要修改pom文件，即可让maven update时候项目jdk设置的是1.8。修改如下：

pom.xml

<build>  
            
              <plugins>
              
              	 <plugin>  
                    <groupId>org.springframework.boot</groupId>  
                    <artifactId>spring-boot-maven-plugin</artifactId>  
                    <configuration>
                    	
                    	<fork>true</fork>
                    </configuration>
                </plugin>  
                 <plugin>  
                        <groupId>org.apache.maven.plugins</groupId>  
                        <artifactId>maven-compiler-plugin</artifactId>  
                        <configuration>  
                            <source>1.8</source>  
                            <target>1.8</target>  
                        </configuration>  
                  </plugin>  
      </plugins>