那些遇到过的问题

我需要为JDK 1.9下载什么泽西版？

Rah*_*hra 6 java rest jax-rs jersey java-9

我正在使用jdk 1.9.我想提出一个简单的ReST服务.使用maven原型创建项目:jersey-quickstart-webapp.然后我继续修改了pom.xml和web.xml.我的maven配置如下所示:

<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/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>

    <groupId>restWebService</groupId>
    <artifactId>restWebService</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>restWebService</name>

    <build>
        <finalName>restWebService</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <inherited>true</inherited>
                <configuration>
                    <source>9</source>
                    <target>9</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.glassfish.jersey</groupId>
                <artifactId>jersey-bom</artifactId>
                <version>${jersey.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.0.0.RELEASE</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.jersey/jersey-client -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-client</artifactId>
            <version>1.19.4</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.jersey/jersey-bundle -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-bundle</artifactId>
            <version>1.19.4</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.jersey/jersey-server -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.19.4</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.jersey/jersey-core -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-core</artifactId>
            <version>1.19.4</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/asm/asm -->
        <dependency>
            <groupId>org.ow2.asm</groupId>
            <artifactId>asm</artifactId>
            <version>6.0_BETA</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.json/json -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20170516</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.xml.bind/jaxb-impl -->
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-impl</artifactId>
            <version>2.3.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.xml/jaxb-api -->
        <dependency>
            <groupId>javax.xml</groupId>
            <artifactId>jaxb-api</artifactId>
            <version>2.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.activation/activation -->
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1.1</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.19.4</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.xml.bind/jaxb-core -->
        <dependency>
            <groupId>com.sun.xml.bind</groupId>
            <artifactId>jaxb-core</artifactId>
            <version>2.3.0</version>
        </dependency>

    </dependencies>
    <properties>
        <jersey.version>2.16</jersey.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>
</project>
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web.xml看起来像这样:

<?xml version="1.0" encoding="UTF-8"?>
<!-- This web.xml file is not required when using Servlet 3.0 container,
     see implementation details http://jersey.java.net/nonav/documentation/latest/jax-rs.html -->
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
    <servlet>
        <servlet-name>Jersey REST Service</servlet-name>
        <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>com.sun.jersey.config.property.packages</param-name>
            <param-value>restWebService</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey REST Service</servlet-name>
        <url-pattern>/webapi/*</url-pattern>
    </servlet-mapping>
</web-app>
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当我尝试点击此URL:http:// localhost:8080/webapi/myresource - 我看到以下错误:

HTTP Status 500 – Internal Server Error

Type Exception Report

Message Servlet.init() for servlet [Jersey REST Service] threw exception

Description The server encountered an unexpected condition that prevented it from fulfilling the request.

Exception

javax.servlet.ServletException: Servlet.init() for servlet [Jersey REST Service] threw exception
    org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:475)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:500)
    org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
    org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
    org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    java.base/java.lang.Thread.run(Thread.java:844)
Root Cause

java.lang.IllegalArgumentException
    jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:170)
    jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:153)
    jersey.repackaged.org.objectweb.asm.ClassReader.<init>(ClassReader.java:424)
    com.sun.jersey.spi.scanning.AnnotationScannerListener.onProcess(AnnotationScannerListener.java:138)
    com.sun.jersey.core.spi.scanning.uri.FileSchemeScanner$1.f(FileSchemeScanner.java:86)
    com.sun.jersey.core.util.Closing.f(Closing.java:71)
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当我将构建配置从1.9更改为1.8

<configuration>
    <source>1.8</source>
    <target>1.8</target>
</configuration>
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服务出现没有任何问题,我在浏览器上看到了预期的结果.

我正在使用Intellij,Project SDK - 9,Project Language Level - 9

我应该导入哪些罐子以使其与1.9一起使用？或者我是否需要更改maven配置才能使其正常工作？

编辑:依赖树

[INFO] Scanning for projects...
[INFO]                                                                         
[INFO] ------------------------------------------------------------------------
[INFO] Building restWebService 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[WARNING] The artifact javax.xml:jaxb-api:jar:2.1 has been relocated to javax.xml.bind:jaxb-api:jar:2.1
[INFO] 
[INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @ restWebService ---
[WARNING] The artifact javax.xml:jaxb-api:jar:2.1 has been relocated to javax.xml.bind:jaxb-api:jar:2.1
[INFO] restWebService:restWebService:war:1.0-SNAPSHOT
[INFO] +- org.springframework:spring-core:jar:5.0.0.RELEASE:compile
[INFO] |  \- org.springframework:spring-jcl:jar:5.0.0.RELEASE:compile
[INFO] +- com.sun.jersey:jersey-client:jar:1.19.4:compile
[INFO] +- com.sun.jersey:jersey-bundle:jar:1.19.4:compile
[INFO] |  \- javax.ws.rs:jsr311-api:jar:1.1.1:compile
[INFO] +- com.sun.jersey:jersey-server:jar:1.19.4:compile
[INFO] +- com.sun.jersey:jersey-core:jar:1.19.4:compile
[INFO] +- org.ow2.asm:asm:jar:6.0_BETA:compile
[INFO] +- org.json:json:jar:20170516:compile
[INFO] +- com.sun.xml.bind:jaxb-impl:jar:2.3.0:compile
[INFO] +- javax.xml.bind:jaxb-api:jar:2.1:compile
[INFO] |  \- javax.xml.stream:stax-api:jar:1.0-2:compile
[INFO] +- javax.activation:activation:jar:1.1.1:compile
[INFO] +- com.sun.jersey:jersey-json:jar:1.19.4:compile
[INFO] |  +- org.codehaus.jettison:jettison:jar:1.1:compile
[INFO] |  +- org.codehaus.jackson:jackson-core-asl:jar:1.9.2:compile
[INFO] |  +- org.codehaus.jackson:jackson-mapper-asl:jar:1.9.2:compile
[INFO] |  +- org.codehaus.jackson:jackson-jaxrs:jar:1.9.2:compile
[INFO] |  \- org.codehaus.jackson:jackson-xc:jar:1.9.2:compile
[INFO] \- com.sun.xml.bind:jaxb-core:jar:2.3.0:compile
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.910 s
[INFO] Finished at: 2017-10-14T22:05:15-04:00
[INFO] Final Memory: 13M/44M
[INFO] ------------------------------------------------------------------------
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Nam*_*man 1

您可能需要更新相当多的工件。首先，您应该检查您的模块，mvn dependency:tree以查找asm引入版本的任何来源< 6.0.x，因为它与 Java9 不兼容。根据当前的pom.xml执行日志推断，您可以更新

<!-- https://mvnrepository.com/artifact/asm/asm -->
<dependency>
    <groupId>asm</groupId>
    <artifactId>asm</artifactId>
    <version>3.3.1</version>
</dependency>
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到

<dependency>
    <groupId>org.ow2.asm</groupId>
    <artifactId>asm</artifactId>
    <version>6.0</version>
</dependency>
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重要的是，使用Java 9 兼容的 Maven 插件，例如 -

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-compiler-plugin</artifactId>
    <version>3.7.0</version>
    <inherited>true</inherited>
    <configuration>
        <source>9</source>
        <target>9</target>
    </configuration>
</plugin>
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顺便说一句，您最终可能仍然面临一些其他挑战（我可以看到相互冲突的jaxb依赖关系，甚至asm可能是从 传递的jersey）来解决您应该运行的问题

mvn dependency:analyze
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并确保在这种情况下排除冲突的依赖项，以利用其更新版本。

  • 当 ASM 要求读取其可以理解的较新版本的类文件时，ASM 会抛出 llegalArgumentException。所以我认为这些评论是正确的。然而，如果你仔细观察堆栈帧“jersey.repackaged.org.objectweb.asm.ClassReader.&lt;init&gt;”，那么看起来 Jersey 已经重新打包了 ASM。所以我认为您需要找到包含 ASM 6 的 Jersey 版本（需要解析 53.0 版本的类文件）。 (5认同)

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