Question

我创建了Maven项目，其中我提到了spring-boot-starter-web我已经获得slf4j-api-1.7.25.jar而我正在使用JDK9。但它找不到org/slf4j/LoggerFactory

线程“main”中的异常java.lang.NoClassDefFoundError：组织/ SLF4J /的LoggerFactory 在org.apache.commons.logging.impl.SLF4JLogFactory.getInstance（SLF4JLogFactory.java:155）在org.apache.commons.logging.impl.SLF4JLogFactory.getInstance（SLF4JLogFactory.java:132）在org.apache.commons.logging.LogFactory.getLog（LogFactory.java:273）在org.springframework.boot.SpringApplication。（SpringApplication.java:179）在com.javaqubes.app.HelloWorldSpringBootApp.main（HelloWorldSpringBootApp.java:9）引起：java.lang.ClassNotFoundException：org.slf4j.LoggerFactory at java.net.URLClassLoader.findClass（URLClassLoader.java:381） at java.lang.ClassLoader.loadClass（ClassLoader.java:424） at sun.misc.Launcher $ AppClassLoader.loadClass（Launcher.java:335） at java.lang.ClassLoader.loadClass（ClassLoader.java:357） ......还有5个

源代码：

package com.javaqubes.app;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

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

控制器：

package com.javaqubes.app.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloWorldController {

    @RequestMapping(value = "/")
    public String hello() {
        return "Hello World ...... !!!!!";
    }
}

pom.xml : 

<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.javaqubes.app</groupId>
    <artifactId>01-HelloWorldSpringBoot</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.4.RELEASE</version>
    </parent>

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

        </dependency>
    </dependencies>
</project>

Answer 1

Spring Boot 1.5不支持Java 9.您必须使用Spring Boot 2或降级到Java 8.另请参阅以下文章：https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-with-Java-9

使用Java 9在SprnigBoot中找不到org / slf4j / LoggerFactory

1 个答案: