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java - 当我在 Eclipse 中构建我的 Spring Boot 应用程序时得到一个期望

问题描述

这是代码

package com.letsstartcoding.springbootrestapiexample;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;

@SpringBootApplication
@EnableJpaAuditing
public class EmployeeApplication {
    public static void main(String[] args) {
        SpringApplication.run(EmployeeApplication.class, args);
    }

}

这是我运行上面的特定代码时发生的异常。任何帮助将不胜感激

Exception in thread "main" java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
    at org.springframework.boot.devtools.restart.DefaultRestartInitializer.getUrls(DefaultRestartInitializer.java:93)
    at org.springframework.boot.devtools.restart.DefaultRestartInitializer.getInitialUrls(DefaultRestartInitializer.java:56)
    at org.springframework.boot.devtools.restart.Restarter.<init>(Restarter.java:140)
    at org.springframework.boot.devtools.restart.Restarter.initialize(Restarter.java:546)
    at org.springframework.boot.devtools.restart.RestartApplicationListener.onApplicationStartingEvent(RestartApplicationListener.java:67)
    at org.springframework.boot.devtools.restart.RestartApplicationListener.onApplicationEvent(RestartApplicationListener.java:45)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122)
    at org.springframework.boot.context.event.EventPublishingRunListener.starting(EventPublishingRunListener.java:69)
    at org.springframework.boot.SpringApplicationRunListeners.starting(SpringApplicationRunListeners.java:48)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:292)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
    at com.letsstartcoding.springbootrestapiexample.EmployeeApplication.main(EmployeeApplication.java:11)

标签： javaspring-boot

解决方案

这可能是 String Boot 迁移到 JDK 9 的问题。 Spring Boot Dev Tools v1.5 is not compatible with Java 9 per this bug。该问题已在 Spring Boot 2.0.0.M5 中修复。

检查Spring Boot 插件故障部分。

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