Spring Cloud 支持哪个 Java 版本? [英] Which Java version is supported by Spring Cloud?

问题描述

在 http://start.spring.io (Initializr) 下，您可以为 Java 创建一个 Spring Cloud 应用程序6.Spring Boot 参考文档仍然提示支持 Java 6:http://docs.spring.io/spring-boot/docs/1.2.2.RELEASE/reference/htmlsingle/#howto-use-java-6我可以用 Java 6 编译生成的Initializr"项目，但是当我尝试在 Java 6 上运行应用程序时，我得到以下 UnsupportedClassVersionError:

Under http://start.spring.io (Initializr) you can create a Spring Cloud application for Java 6. The Spring Boot reference documentation still gives the hint that Java 6 is supported: http://docs.spring.io/spring-boot/docs/1.2.2.RELEASE/reference/htmlsingle/#howto-use-java-6 I can compile the generated "Initializr" project with Java 6, but when I try to run the application on Java 6 I get the following UnsupportedClassVersionError:

java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:53)
    at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.IllegalArgumentException: Cannot instantiate interface org.springframework.context.ApplicationListener : org.springframework.cloud.bootstrap.BootstrapApplicationListener
    at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:381)
    at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:358)
    at org.springframework.boot.SpringApplication.initialize(SpringApplication.java:231)
    at org.springframework.boot.SpringApplication.<init>(SpringApplication.java:206)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
    at com.daimler.daivb.services.common.configserver.ConfigserverApplication.main(ConfigserverApplication.java:16)
    ... 6 more
Caused by: java.lang.UnsupportedClassVersionError: org/springframework/cloud/bootstrap/BootstrapApplicationListener : Unsupported major.minor version 51.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:615)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
    at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
    at org.springframework.boot.loader.LaunchedURLClassLoader.doLoadClass(LaunchedURLClassLoader.java:163)
    at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:136)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
    at org.springframework.util.ClassUtils.forName(ClassUtils.java:249)
    at org.springframework.boot.SpringApplication.getSpringFactoriesInstances(SpringApplication.java:374)
    ... 12 more

那么问题来了，spring-cloud-context-1.0.1.RELEASE.jar:/org/springframework/cloud/bootstrap/BootstrapApplicationListener.class库是用Java 7和目标版本编译的，是不是有误Java 7?

So the question is, is it a mistake that the spring-cloud-context-1.0.1.RELEASE.jar:/org/springframework/cloud/bootstrap/BootstrapApplicationListener.class library has been compiled with Java 7 and target version Java 7?

推荐答案

Spring Cloud 需要 Java 7(除了一个模块需要 Java 8).Spring Cloud Commons 自述文件将使用该信息进行更新.我将看到关于在选择 Spring Cloud 依赖项时记录 Initializr 的问题以不允许使用 java 6.

Spring Cloud requires Java 7 (except for one module that requires java 8). The Spring Cloud Commons readme will get updated with that information. I'll see about logging an issue with Initializr to not allow java 6 when spring cloud dependencies are chosen.

这篇关于Spring Cloud 支持哪个 Java 版本?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！