Question

这是我的第一个spring-boot项目，并且我对tomcat有问题。服务器无法启动。该项目未使用玻璃鱼，对此消息令我更加惊讶。该项目是在Maven中创建的。我已经坐了好几个小时来解决这个问题，却找不到问题。有人可以帮我吗？

2019-12-11 16:21:30.775  WARN 10436 --- [           main]         o.a.tomcat.util.scan.StandardJarScanner  : Failed to scan [file:/C:/Users/maxwell/.m2/repository/org/glassfish/hk2/hk2/2.6.1/hk2-utils.jar] from classloader hierarchy

java.io.IOException: java.lang.reflect.InvocationTargetException
  at org.apache.tomcat.util.compat.Jre9Compat.jarFileNewInstance(Jre9Compat.java:236) ~[tomcat-embed-core-9.0.29.jar:9.0.29]

这是我的pom.xml文件：

<?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 https://maven.apache.org    /xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.2.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>maxwell</groupId>
    <artifactId>appdemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>appdemo</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>11</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jersey</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-webflux</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-taglibs -->
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-taglibs</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-rest -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-tomcat -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
            <scope>provided</scope>
        </dependency>


        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>providet</scope> 
        </dependency>

        <dependency>
            <groupId>javax.xml.bind</groupId>
            <artifactId>jaxb-api</artifactId>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- Tests -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>io.projectreactor</groupId>
            <artifactId>reactor-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

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

</project>

Answer 1

您的依赖项似乎有问题：您可以检查此错字

tomcat-embed-jasper依赖性

providet

其他问题，如果您使用的是tomcat，为什么还要有两个依赖关系就可以了。

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


        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>providet</scope> 
        </dependency>

检查example pom

spring boot Web依赖已经足够，它已经包含了tomcat。您无需显式定义tomcat依赖

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

Answer 2

我也遇到了这个问题，因此我们不能同时使用spring-boot-starter-web和spring-boot-starter-jersey，因为glassfish是jersey的一部分，因此只需从两个就我而言，他们删除了starter-jersey

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

最终问题已经消失，请尝试

Answer 3

如果这是一个新项目，我将尝试运行在https://start.spring.io/上生成的标准项目。这样，您可以确定项目应该是可运行的，并且任何失败都归咎于项目或IDE以外的任何其他原因。如果没有运行，我将重新安装Tomcat。

Answer 4

您应该在pom.xml中将包装添加到war中： <packaging>war</packaging>

如何解决tomcat的问题？春季启动“扫描失败”

4 个答案:

最终问题已经消失，请尝试