Question

我以前使用过Spring Boot，但没有用于Web应用程序。我正处于该项目的早期开发阶段（我刚刚完成了实体类的构建），并且在运行该项目时遇到了一个奇怪的异常：

java.io.FileNotFoundException: C:\Users\607337\.m2\repository\com\mchange\c3p0\0.9.5.2\mchange-commons-java-0.2.11.jar (The system cannot find the file specified)
at java.util.zip.ZipFile.open(Native Method) ~[na:1.8.0_162]
at java.util.zip.ZipFile.<init>(ZipFile.java:225) ~[na:1.8.0_162]
at java.util.zip.ZipFile.<init>(ZipFile.java:155) ~[na:1.8.0_162]
at java.util.jar.JarFile.<init>(JarFile.java:166) ~[na:1.8.0_162]
at java.util.jar.JarFile.<init>(JarFile.java:130) ~[na:1.8.0_162]
at org.apache.tomcat.util.compat.JreCompat.jarFileNewInstance(JreCompat.java:188) ~[tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.tomcat.util.scan.JarFileUrlJar.<init>(JarFileUrlJar.java:65) ~[tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.tomcat.util.scan.JarFactory.newInstance(JarFactory.java:49) ~[tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.tomcat.util.scan.StandardJarScanner.process(StandardJarScanner.java:374) [tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.tomcat.util.scan.StandardJarScanner.processURLs(StandardJarScanner.java:309) [tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.tomcat.util.scan.StandardJarScanner.doScanClassPath(StandardJarScanner.java:266) [tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.tomcat.util.scan.StandardJarScanner.scan(StandardJarScanner.java:229) [tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.jasper.servlet.TldScanner.scanJars(TldScanner.java:262) [tomcat-embed-jasper-8.5.31.jar:8.5.31]
at org.apache.jasper.servlet.TldScanner.scan(TldScanner.java:104) [tomcat-embed-jasper-8.5.31.jar:8.5.31]
at org.apache.jasper.servlet.JasperInitializer.onStartup(JasperInitializer.java:101) [tomcat-embed-jasper-8.5.31.jar:8.5.31]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5245) [tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1421) [tomcat-embed-core-8.5.31.jar:8.5.31]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1411) [tomcat-embed-core-8.5.31.jar:8.5.31]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_162]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_162]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_162]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_162]

这是我的POM.xml（忽略所有设置为范围编译的事实，我会在某个时候进行更改）：

    <?xml version="1.0" encoding="UTF-8"?>

http://maven.apache.org/xsd/maven-4.0.0.xsd“> 4.0.0

<groupId>com.mdenis</groupId>
<artifactId>LEM2</artifactId>
<version>1.0-SNAPSHOT</version>

<name>Lab Equiment Manager</name>

<properties>
    <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

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

<dependencies>

     <!--JAVA-->
    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-web-api</artifactId>
        <version>8.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
    </dependency>

    <!--TOMCAT-->
    <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>compile</scope>
    </dependency>

    <!--SPRING-->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <optional>true</optional>
    </dependency>

    <!--JTDS-->
    <dependency>
        <groupId>net.sourceforge.jtds</groupId>
        <artifactId>jtds</artifactId>
        <scope>compile</scope>
    </dependency>

    <!--HIBERNATE-->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>6.0.10.Final</version>
        <scope>compile</scope>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-c3p0</artifactId>
        <scope>compile</scope>
    </dependency>

    <!--LOMBOK-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <scope>compile</scope>
    </dependency>

    <!--JSTL-->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <scope>compile</scope>
    </dependency>

</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.7.0</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
                <compilerArguments>
                    <endorseddirs>${endorsed.dir}</endorseddirs>
                </compilerArguments>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-dependency-plugin</artifactId>
            <version>3.1.1</version>
            <executions>
                <execution>
                    <phase>validate</phase>
                    <goals>
                        <goal>copy</goal>
                    </goals>
                    <configuration>
                        <outputDirectory>${endorsed.dir}</outputDirectory>
                        <silent>true</silent>
                        <artifactItems>
                            <artifactItem>
                                <groupId>javax</groupId>
                                <artifactId>javaee-endorsed-api</artifactId>
                                <version>7.0</version>
                                <type>jar</type>
                            </artifactItem>
                        </artifactItems>
                    </configuration>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <artifactId>maven-assembly-plugin</artifactId>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>single</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <descriptorRefs>
                    <descriptorRef>jar-with-dependencies</descriptorRef>
                </descriptorRefs>
                <finalName>LabEquipmentManager</finalName>
                <appendAssemblyId>false</appendAssemblyId>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
            <version>2.0.3.RELEASE</version>
            <executions>
                <execution>
                    <goals>
                        <goal>repackage</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

某事正在错误的文件夹中寻找此文件，因为它不在我的存储库中。要么就是我缺少依赖项之类的东西。有人看过吗？

******更新******

忘记了此详细信息，但项目实际上已部署并正常工作。我能够运行代码来创建实体，而不能创建实体。它更多是一种信息性的异常类型，但我仍然希望它消失！

谢谢！

Answer 1

您似乎在代码中引用了mchange c3p0框架，但在您的pom文件中没有看到对该框架的引用。

尝试将其作为依赖项添加到您的pom文件中：

<dependency>
    <groupId>com.mchange</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.5.2</version>
</dependency>

Answer 2

经过一些研究，我发现Hikari实际上捆绑在Spring Boot中。我删除了C3P0，并用Hikari的HikariDataSource替换了ComboPooledDataSource实现。一切都像魅力一样，当然错误也消失了。

Answer 3

您可以在spring-boot application.properties中禁用对tomcat的jar扫描

server.tomcat.additional-tld-skip-patterns=*.jar

适用于mchange-commons-java-0.2.11.jar的Spring Boot Web应用FileNotFoundException

3 个答案: