Question

我正在与eclipse + tomcat配置挣扎。我在云端部署了我的应用程序，但我可以离线进行一些更改（速度更快），然后部署一些有效的工作。我使用maven设置了web项目。我有2个依赖项（不提及必要的javax）：org.json和joda-time。问题是我无法弄清楚如何下载这些依赖项。每次我想运行项目时，tomcat都无法以长堆栈跟踪开始，但我知道问题是该行：Caused by: Java.lang.NoClassDefFoundError: javax/json/JsonObject。这意味着，依赖关系罐子不存在（我认为是int WEB-INF/lib）。我在项目＆gt; maven-＆gt;更新项目上尝试了ppm，在服务器上测试了ppm-＆gt;干净，服务器上的ppm-＆gt;发布。我还检查了project-＆gt; properties-＆gt;部署组件和Maven依赖关系......我已经在网上搜索了很多，而且我的想法已经用完了。谢谢你的帮助，干杯！

UPDATE 的pom.xml

<?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>

    <groupId>openshifttest</groupId>
    <artifactId>openshifttest</artifactId>
    <packaging>war</packaging>
    <version>1.0</version>
    <name>openshifttest</name>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>

        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20090211</version>
        </dependency>

        <dependency>
            <groupId>joda-time</groupId>
            <artifactId>joda-time</artifactId>
            <version>2.8.2</version>
        </dependency>

    </dependencies>

<profiles>
    <profile>
     <!-- When built in OpenShift the 'openshift' profile will be used when invoking mvn. -->
     <!-- Use this profile for any OpenShift specific customization your app will need. -->
     <!-- By default that is to put the resulting archive into the 'deployments' folder. -->
     <!-- http://maven.apache.org/guides/mini/guide-building-for-different-environments.html -->
     <id>openshift</id>
     <build>
        <finalName>openshifttest</finalName>
        <plugins>
          <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.3</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                    <outputDirectory>deployments</outputDirectory>
                      <warName>ROOT</warName>
                </configuration>
            </plugin>
        </plugins>
      </build>
    </profile>
  </profiles>
</project>

Answer 1

我认为tomcat可能没有提供Java EE API，请尝试更改

    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-api</artifactId>
        <version>7.0</version>
        <scope>provided</scope>
    </dependency>

到

    <dependency>
        <groupId>javax</groupId>
        <artifactId>javaee-api</artifactId>
        <version>7.0</version>
    </dependency>

（删除提供的范围）。

java maven eclipse tomcat无法启动NoClassDefFoundError

1 个答案: