Spring boot 启动报错 Unsupported major.minor version 52.0

ゝ一世哀愁。 2021-09-26 05:08 355阅读 0赞

\#Spring boot 启动报错 Unsupported major.minor version 52.0

## 问题描述 ##

在创建spring boot hello world 工程时候启动报错， Unsupported major.minor version 52.0。

Exception in thread "main" java.lang.UnsupportedClassVersionError: com/yf/springboot/Application : Unsupported major.minor version 52.0
    	at java.lang.ClassLoader.defineClass1(Native Method)
    	at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    	at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    	at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    	at java.security.AccessController.doPrivileged(Native Method)
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

## 工程描述 ##

pom文件如下：

<?xml version="1.0" encoding="UTF-8"?>  
    <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">  
        <modelVersion>4.0.0</modelVersion>  
        <groupId>com.yf.springboot</groupId>  
        <artifactId>spring-boot-hello</artifactId>  
        <version>0.0.1-SNAPSHOT</version>  
          
        <parent>  
            <groupId>org.springframework.boot</groupId>  
            <artifactId>spring-boot-starter-parent</artifactId>  
           
            <version>1.4.1.RELEASE</version>
        </parent>  
      	<properties>
      		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      		<java-version>1.7</java-version>
      	</properties>
      	
          
        <dependencies>  
        
            <dependency>  
                <groupId>org.springframework.boot</groupId>  
                <artifactId>spring-boot-starter-web</artifactId>  
                
            </dependency> 
            
             <dependency>  
                <groupId>com.alibaba</groupId>  
                <artifactId>fastjson</artifactId>  
                <version>1.2.15</version>
            </dependency> 
             
        </dependencies>  
      
          
        <build>  
            
                 
            
                 <plugins>
                <plugin>  
                    <groupId>org.springframework.boot</groupId>  
                    <artifactId>spring-boot-maven-plugin</artifactId>  
                    <dependencies>
                    	<dependency>
                    		<groupId>org.springframework</groupId>
                    		<artifactId>springloaded</artifactId>
                    		<version>1.2.3.RELEASE</version>
                    	</dependency>
                    </dependencies>
                    <executions>
                    	<execution>
                    		<goals>
                    			<goal>repackage</goal>
                    		</goals>
                    	</execution>
                    	
                    </executions>
                    <configuration>
                    	<classifier>exec</classifier>
                    </configuration>
                </plugin>  
            </plugins>  
        </build>  
      
          
          
        
    </project>

![工程目录结构][SouthEast]

最后根据报错描述，和网上了解，出错是因为Spring boot 版本的许多jar包 依赖JDK1.8，所以启动时候会报错，类似不支持jdk版本的提示。只要换上JDK8 环境就可以啦。

因为本人Eclipse 是最新版本的依赖jdk1.8，所以不需要安装jdk8。所以再eclipse更还jre换班即可。  
更换操作如下：  
1、build path

![这里写图片描述][SouthEast 1]

2、add library  
![这里写图片描述][SouthEast 2]

3、select jdk version  
![这里写图片描述][SouthEast 3]

4、maven update - 重新编译项目  
![这里写图片描述][SouthEast 4]

经过上诉步骤操作，成功启动spring boot hello world 程序。

[SouthEast]: /images/20210923/6fb223b768b94d35a067f5741e4806d1.png
[SouthEast 1]: /images/20210923/096dc9d64a1b45fe87466176ad5d0759.png
[SouthEast 2]: /images/20210923/77cdb71fbc6546e58219dada85b38683.png
[SouthEast 3]: /images/20210923/8f17ddf822304edbae0206689c0c2669.png
[SouthEast 4]: /images/20210923/47da61c024a94b80b30c5dcc36ab7584.png