spring boot 1.4.x所需的最低Java版本是什么

Question

我正在使用spring boot 1.4.x开发一个web服务，并在支持Java 6的WebSphere8.5中部署它。但是当我部署war时，我得到了以下错误。

看起来像是spring boot的jar依赖项（spring-ws-core-2.3.1.release.jar）中有一个用Java 7编译的类，这导致了下面的错误。

使用spring boot 1.4.x所需的最低Java版本是什么？在我的情况下，是否可以将上面的依赖项单独覆盖到较低的版本？

错误：

 2/16/17 10:58:08:296 EST] 000000f2 CompositionUn E   WSVR0194E: Composition unit WebSphere:cuname=testpp-1_0_0-SNAPSHOT_war in BLA WebSphere:blaname=testpp-1_0_0-SNAPSHOT_war failed to start.
[2/16/17 10:58:08:299 EST] 000000f2 MBeanHelper   E   Could not invoke an operation on object: WebSphere:name=ApplicationManager,process=server1,platform=proxy,node=MyNode,version=8.5.5.2,type=ApplicationManager,mbeanIdentifier=ApplicationManager,cell=MyCell,spec=1.0 because of an mbean exception: com.ibm.ws.exception.RuntimeWarning: com.ibm.ws.webcontainer.exception.WebAppNotLoadedException: Failed to load webapp: Failed to load webapp: JVMCFRE003 bad major version&#59&#59; class=org/springframework/ws/transport/http/support/AbstractMessageDispatcherServletInitializer, offset=6
[2/16/17 10:58:08:299 EST] 000000f2 SystemErr     R com.ibm.ws.exception.RuntimeWarning: com.ibm.ws.webcontainer.exception.WebAppNotLoadedException: Failed to load webapp: Failed to load webapp: JVMCFRE003 bad major version&#59&#59; class=org/springframework/ws/transport/http/support/AbstractMessageDispatcherServletInitializer, offset=6
[2/16/17 10:58:08:300 EST] 000000f2 SystemErr     R     at com.ibm.ws.webcontainer.component.WebContainerImpl.install(WebContainerImpl.java:432)
[2/16/17 10:58:08:300 EST] 000000f2 SystemErr     R     at com.ibm.ws.webcontainer.component.WebContainerImpl.start(WebContainerImpl.java:718)
[2/16/17 10:58:08:300 EST] 000000f2 SystemErr     R     at com.ibm.ws.runtime.component.ApplicationMgrImpl.start(ApplicationMgrImpl.java:1177)
[2/16/17 10:58:08:300 EST] 000000f2 SystemErr     R     at com.ibm.ws.runtime.component.DeployedApplicationImpl.fireDeployedObjectStart(DeployedApplicationImpl.java:1370)
[2/16/17 10:58:08:300 EST] 000000f2 SystemErr     R     at com.ibm.ws.runtime.component.DeployedModuleImpl.start(DeployedModuleImpl.java:639)
[2/16/17 10:58:08:300 EST] 000000f2 SystemErr     R     at com.ibm.ws.runtime.component.DeployedApplicationImpl.start(DeployedApplicationImpl.java:968)

POM配置

testap spring boot演示项目

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.4.4.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.6</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web-services</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

Answer 1

根据参考文档：

默认情况下，spring boot 1.4.4.Release需要Java 7和spring框架4.3.6.Release或更高版本。你可以使用spring boot与一些额外的配置Java 6。详见第81.11节“如何使用Java 6”。为Maven(3.2+)和Gradle(1.12或2.x)提供了显式构建支持。不推荐支持Gradle2.8及更早版本。不支持Gradle 3。

您遇到问题的依赖关系不是spring boot,而是单独的spring Web服务,它只与Java 7兼容：

spring网络服务需要一个标准的Java 7运行时环境。Java 8号也得到支持。spring-WS构建在spring框架4.0.9上，但支持更高版本。

您可以尝试降级或排除依赖关系，但有很高的风险，您打破了某些东西。