Question

这是我第一次在堆栈上问。一开始我想注意到我的英语太糟糕了。我正在用Java编写程序，该程序必须读取文件并将内容发送到localhost：8083 / list，但这是模块之一。我的pom.xml看起来像这样

<?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>

    <parent>
        <groupId>org.antek</groupId>
        <artifactId>spring-boot-multi-module</artifactId>
        <version>0.0.1-SNAPSHOT</version>
    </parent>

    <artifactId>List</artifactId>
    <packaging>jar</packaging>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-framework-bom</artifactId>
        </dependency>
    </dependencies>

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

</project>

我的父母pom.xml看起来

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
         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>org.antek</groupId>
    <artifactId>spring-boot-multi-module</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.3.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <modules>
        <module>List</module>
        <module>MainPage</module>
    </modules>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.yaml</groupId>
                <artifactId>snakeyaml</artifactId>
                <version>1.18</version>
            </dependency>
            <dependency>
                <groupId>org.junit.jupiter</groupId>
                <artifactId>junit-jupiter-api</artifactId>
                <version>5.0.3</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.assertj</groupId>
                <artifactId>assertj-core</artifactId>
                <version>3.10.0</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-jpa</artifactId>
            </dependency>
            <dependency>
                <groupId>com.h2database</groupId>
                <artifactId>h2</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-framework-bom</artifactId>
                <version>4.0.3.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

</project>

我的Appliaction.java看起来像这样

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

@SpringBootApplication
public class Application {

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

我的控制器

import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
@EnableAutoConfiguration
public class ListController {
    @RequestMapping("/list")
    @ResponseBody
    class Lista {
        MainList list = new MainList();
    }
}

最后确定我的程序

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;


public class MainList {
    public static int zwracanie(String[] args) throws IOException {
            String filePath = "C:\\Users\\Antoni\\Desktop\\Lista.txt";
            int number = 0;
            BufferedReader fileReader = null;

            try {
                fileReader = new BufferedReader(new FileReader(filePath));
                String numberAsString = fileReader.readLine();
                number = Integer.parseInt(numberAsString);
            } finally {
                if (fileReader != null) {
                    fileReader.close();
                }
            }
            return number;
        }
    }

我正在IntelliJ Idea中工作，当我尝试编译该文件时出现问题

线程“主”中的异常java.lang.IllegalArgumentException：无法实例化接口org.springframework.context.ApplicationListener：org.springframework.boot.context.logging.ClasspathLoggingApplicationListener 在org.springframework.boot.SpringApplication.createSpringFactoriesInstances（SpringApplication.java:448）处在org.springframework.boot.SpringApplication.getSpringFactoriesInstances（SpringApplication.java:427）在org.springframework.boot.SpringApplication.getSpringFactoriesInstances（SpringApplication.java:418）在org.springframework.boot.SpringApplication。（SpringApplication.java:268）在org.springframework.boot.SpringApplication。（SpringApplication.java:247）在org.springframework.boot.SpringApplication.run（SpringApplication.java:1255）在org.springframework.boot.SpringApplication.run（SpringApplication.java:1243）在Application.main（Application.java:8）造成原因：java.lang.NoClassDefFoundError：org / springframework / context / event / GenericApplicationListener 在java.base / java.lang.ClassLoader.defineClass1（本机方法）在java.base / java.lang.ClassLoader.defineClass（ClassLoader.java:1009）在java.base / java.security.SecureClassLoader.defineClass（SecureClassLoader.java:174）在java.base / jdk.internal.loader.BuiltinClassLoader.defineClass（BuiltinClassLoader.java:801）在java.base / jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull（BuiltinClassLoader.java:699）在java.base / jdk.internal.loader.BuiltinClassLoader.loadClassOrNull（BuiltinClassLoader.java:622）在java.base / jdk.internal.loader.BuiltinClassLoader.loadClass（BuiltinClassLoader.java:580）在java.base / jdk.internal.loader.ClassLoaders $ AppClassLoader.loadClass（ClassLoaders.java:190）在java.base / java.lang.ClassLoader.loadClass（ClassLoader.java:499）在org.springframework.util.ClassUtils.forName（ClassUtils.java:274）在org.springframework.boot.SpringApplication.createSpringFactoriesInstances（SpringApplication.java:440） ...另外7个引起原因：java.lang.ClassNotFoundException：org.springframework.context.event.GenericApplicationListener 在java.base / jdk.internal.loader.BuiltinClassLoader.loadClass（BuiltinClassLoader.java:582）在java.base / jdk.internal.loader.ClassLoaders $ AppClassLoader.loadClass（ClassLoaders.java:190）在java.base / java.lang.ClassLoader.loadClass（ClassLoader.java:499） ...另外18个

Answer 1

删除依赖项

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-framework-bom</artifactId>
</dependency>

您使用版本4.0.3.RELEASE添加了该版本，它与Spring Boot管理的版本产生版本冲突。

线程“主”中的异常java.lang.IllegalArgumentException：无法实例化接口org.springframework.context.ApplicationListener

1 个答案: