1.3.7. -> 1.4.1.-> java.lang.NoSuchMethodError：

Question

如果切换到新版本的SpringBoot，则在启动应用程序时会收到上述错误消息。为什么会这样呢？

祝史蒂文万事如意

pom.xml

<?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>de.xyz.microservice</groupId>
<artifactId>spring-boot-test</artifactId>
<version>1.0-SNAPSHOT</version>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <!--version>1.3.7.RELEASE</version-->
    <version>1.4.1.RELEASE</version>
</parent>
<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

</project>

Stacktrace

Exception in thread "main" java.lang.NoSuchMethodError:
                   org.springframework.boot.builder.SpringApplicationBuilder.showBanner(Z)Lorg/springframework/boot/builder/SpringApplicationBuilder;
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:109)
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:75)...

MainClass

@SpringBootApplication
@ComponentScan(value = "de.xyzs.microservice")
@EnableAspectJAutoProxy(proxyTargetClass = true)

public class MainClass {

    public static void main(String[] args) {
        SpringApplication.run(MainClass.class, args);
    }
}

Answer 1

我能够通过显式声明适用于1.4.4版本的云上下文依赖来解决这个问题。

    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-context</artifactId>
        <version>1.1.8.RELEASE</version>
    </dependency>

Answer 2

在使用Spring 1.4.1 working时，他们将其更改为

new SpringApplicationBuilder().showBanner()

至

new SpringApplicationBuilder().bannerMode(Banner.Mode bannerMode)

Banner.Mode bannerMode需要一个枚举的位置:控制台、日志或Off。

例子：

new SpringApplicationBuilder().bannerMode(Banner.Mode.CONSOLE); //Prints banner to System.out

new SpringApplicationBuilder().bannerMode(Banner.Mode.LOG); //Prints banner to the log file

new SpringApplicationBuilder().bannerMode(Banner.Mode.OFF); //Disables the banner

如果您正在寻找要打印的横幅，请使用第一个标题，Banner.Mode.CONSOLE。

您的新主方法如下所示：

public static void main(String[] args){

    //SpringApplicationBuilder() returns an ApplicationContext, but creating the variable is optional
    ApplicationContext ctx = new SpringApplicationBuilder().bannerMode(Banner.Mode.CONSOLE).run(args);

    //Now, if you need to do something else with the ApplicationContext, you can (such as print all the beans, etc.)
}

下面是SpringApplicationBuilder的java文档：

http://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/builder/SpringApplicationBuilder.html#bannerMode-org.springframework.boot.Banner.Mode-

下面是解释Banner.Mode Enum的java文档：

http://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/Banner.Mode.html

Answer 3

在建立虚拟的生产者-消费者微型服务时，我也遇到了同样的问题。

在Pom.xml中添加下面的更改，可以解决我的问题。

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Camden.SR6</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>