java - 第一个动态 Web 项目

Question

我已经完成了使用 Java 8、Jersey 和 Tomcat 8.5 编写 Rest Webservice 的教程。到目前为止，一切都很顺利。我能够在 Maven 中构建我的项目。但是，当我尝试部署它时，出现以下错误。

Dec 28, 2017 9:11:53 AM org.apache.catalina.core.ApplicationContext log
SEVERE: StandardWrapper.Throwable
java.lang.IllegalArgumentException
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:170)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:153)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:424)
    at com.sun.jersey.spi.scanning.AnnotationScannerListener.onProcess(AnnotationScannerListener.java:138)
    at com.sun.jersey.core.spi.scanning.JarFileScanner.scan(JarFileScanner.java:97)
    at com.sun.jersey.spi.scanning.servlet.WebAppResourcesScanner$1.f(WebAppResourcesScanner.java:94)
    at com.sun.jersey.core.util.Closing.f(Closing.java:71)
    at com.sun.jersey.spi.scanning.servlet.WebAppResourcesScanner.scan(WebAppResourcesScanner.java:92)
    at com.sun.jersey.spi.scanning.servlet.WebAppResourcesScanner.scan(WebAppResourcesScanner.java:79)
    at com.sun.jersey.api.core.ScanningResourceConfig.init(ScanningResourceConfig.java:80)
    at com.sun.jersey.api.core.servlet.WebAppResourceConfig.init(WebAppResourceConfig.java:102)
    at com.sun.jersey.api.core.servlet.WebAppResourceConfig.<init>(WebAppResourceConfig.java:89)
    at com.sun.jersey.api.core.servlet.WebAppResourceConfig.<init>(WebAppResourceConfig.java:74)
    at com.sun.jersey.spi.container.servlet.WebComponent.getWebAppResourceConfig(WebComponent.java:668)
    at com.sun.jersey.spi.container.servlet.ServletContainer.getDefaultResourceConfig(ServletContainer.java:435)
    at com.sun.jersey.spi.container.servlet.ServletContainer.getDefaultResourceConfig(ServletContainer.java:602)
    at com.sun.jersey.spi.container.servlet.WebServletConfig.getDefaultResourceConfig(WebServletConfig.java:87)
    at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:699)
    at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:674)
    at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:205)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:577)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1183)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1099)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:989)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4931)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5241)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

Dec 28, 2017 9:11:53 AM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet [TemperatureApi] in web application [/TemperatureApi] threw load() exception
java.lang.IllegalArgumentException
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:170)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:153)
    at jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:424)
    at com.sun.jersey.spi.scanning.AnnotationScannerListener.onProcess(AnnotationScannerListener.java:138)
    at com.sun.jersey.core.spi.scanning.JarFileScanner.scan(JarFileScanner.java:97)
    at com.sun.jersey.spi.scanning.servlet.WebAppResourcesScanner$1.f(WebAppResourcesScanner.java:94)
    at com.sun.jersey.core.util.Closing.f(Closing.java:71)
    at com.sun.jersey.spi.scanning.servlet.WebAppResourcesScanner.scan(WebAppResourcesScanner.java:92)
    at com.sun.jersey.spi.scanning.servlet.WebAppResourcesScanner.scan(WebAppResourcesScanner.java:79)
    at com.sun.jersey.api.core.ScanningResourceConfig.init(ScanningResourceConfig.java:80)
    at com.sun.jersey.api.core.servlet.WebAppResourceConfig.init(WebAppResourceConfig.java:102)
    at com.sun.jersey.api.core.servlet.WebAppResourceConfig.<init>(WebAppResourceConfig.java:89)
    at com.sun.jersey.api.core.servlet.WebAppResourceConfig.<init>(WebAppResourceConfig.java:74)
    at com.sun.jersey.spi.container.servlet.WebComponent.getWebAppResourceConfig(WebComponent.java:668)
    at com.sun.jersey.spi.container.servlet.ServletContainer.getDefaultResourceConfig(ServletContainer.java:435)
    at com.sun.jersey.spi.container.servlet.ServletContainer.getDefaultResourceConfig(ServletContainer.java:602)
    at com.sun.jersey.spi.container.servlet.WebServletConfig.getDefaultResourceConfig(WebServletConfig.java:87)
    at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:699)
    at com.sun.jersey.spi.container.servlet.WebComponent.createResourceConfig(WebComponent.java:674)
    at com.sun.jersey.spi.container.servlet.WebComponent.init(WebComponent.java:205)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:394)
    at com.sun.jersey.spi.container.servlet.ServletContainer.init(ServletContainer.java:577)
    at javax.servlet.GenericServlet.init(GenericServlet.java:158)
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1183)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1099)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:989)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4931)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5241)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

Dez 28, 2017 9:11:53 AM org.apache.coyote.AbstractProtocol start
INFORMATION: Starting ProtocolHandler ["http-nio-8080"]
Dez 28, 2017 9:11:53 AM org.apache.coyote.AbstractProtocol start
INFORMATION: Starting ProtocolHandler ["ajp-nio-8009"]
Dez 28, 2017 9:11:53 AM org.apache.catalina.startup.Catalina start
INFORMATION: Server startup in 7519 ms

这是我的 web.xml，位于 WebContent/WEB-INF 下

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" version="3.1">
    <display-name>TemperatureApi</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
    <servlet>
        <servlet-name>TemperatureApi App</servlet-name>
        <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>TemperatureApi App</servlet-name>
        <url-pattern>/api/*</url-pattern>
    </servlet-mapping>
</web-app>

这是我的 pom.xml 文件

<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>net.myapp</groupId>
    <artifactId>TemperatureApi</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <name>TemperatureApi</name>
    <description>A Rest Webservice to convert temperatures</description>
    <build>
        <sourceDirectory>src</sourceDirectory>
        <pluginManagement>
            <plugins>
                <plugin>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.7.0</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-war-plugin</artifactId>
                    <version>3.0.0</version>
                    <configuration>
                        <warSourceDirectory>WebContent</warSourceDirectory>
                    </configuration>
                </plugin>
                <plugin>
                    <artifactId>maven-resources-plugin</artifactId>
                    <version>2.6</version>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
    <dependencies>
        <dependency>
            <groupId>org.ow2.asm</groupId>
            <artifactId>asm</artifactId>
            <version>6.0</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-bundle</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20171018</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-core</artifactId>
            <version>1.19.4</version>
        </dependency>
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <version>6.2.2.jre8</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

非常感谢任何帮助，因为我完全迷失了。提前致谢。

Answer 1

终于找到了。 ASM 的依赖项与 Jersey 依赖项不兼容。在 ASM 依赖项中使用版本 3.3.1 后，一切正常。