缺少依赖 org.json:json:jar答案

【问题标题】：Dependency org.json:json:jar is missing缺少依赖 org.json:json:jar
【发布时间】：2018-08-10 17:16:02
【问题描述】：

我正在处理的项目有问题。直到周二，当我构建和运行我的项目时，一切似乎都很好。今天我想运行项目，我收到了这个错误信息：

  [ERROR] [ERROR] Some problems were encountered while processing the POMs:
    [ERROR] 'dependencies.dependency.version' for org.json:json:jar is missing. @ 
    line 57, column 21

添加版本后，由于此异常，构建现在失败：

[WARNING] 
java.lang.NoClassDefFoundError: org/springframework/boot/web/support/SpringBootServletInitializer
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run(AbstractRunMojo.java:491)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.web.support.SpringBootServletInitializer
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 13 more
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------

有什么建议吗？谢谢！

编辑：这是 pom.xml：

<?xml vers

ion="1.0" 编码="UTF-8"?> http://maven.apache.org/xsd/maven-4.0.0.xsd"> 4.0.0

<groupId>com.X</groupId>
<artifactId>spring</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>

<name>Y</name>
<description>Demo project for Spring Boot JPA - PostgreSQL</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>

</properties>

<dependencies>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</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-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.data</groupId>
        <artifactId>spring-data-rest-core</artifactId>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.json/json -->
    <dependency>
        <groupId>org.json</groupId>
        <artifactId>json</artifactId>
        <version>20180130</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
        <groupId>io.jsonwebtoken</groupId>
        <artifactId>jjwt</artifactId>
        <version>0.6.0</version>
    </dependency>
    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>javax.mail-api</artifactId>
        <version>1.5.5</version>
    </dependency>
    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mail</artifactId>
        <version>1.4.7</version>
    </dependency>
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.3.1</version>
    </dependency>
    <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox</artifactId>
        <version>2.0.4</version>
    </dependency>
    <dependency>
        <groupId>org.apache.pdfbox</groupId>
        <artifactId>pdfbox-tools</artifactId>
        <version>2.0.4</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi</artifactId>
        <version>3.16</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml-schemas</artifactId>
        <version>3.16</version>
    </dependency>
    <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml</artifactId>
        <version>3.16</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/org.mockito/mockito-core -->
    <dependency>
        <groupId>org.mockito</groupId>
        <artifactId>mockito-core</artifactId>
        <version>2.10.0</version>
        <scope>test</scope>
    </dependency>
    <!-- https://mvnrepository.com/artifact/junit/junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.hamcrest</groupId>
                <artifactId>hamcrest-core</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.hamcrest</groupId>
        <artifactId>hamcrest-all</artifactId>
        <version>1.3</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>com.jayway.jsonpath</groupId>
        <artifactId>json-path-assert</artifactId>
        <version>2.2.0</version>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.hamcrest</groupId>
                <artifactId>hamcrest-core</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>org.mockito</groupId>
        <artifactId>mockito-all</artifactId>
        <version>1.10.19</version>
        <scope>test</scope>
    </dependency>

</dependencies>

<profiles>
    <profile>
        <id>dev</id>
        <properties>
            <activatedProperties>dev</activatedProperties>
        </properties>
    </profile>
    <profile>
        <id>prod</id>
        <properties>
            <activatedProperties>prod</activatedProperties>
        </properties>
        <activation>
            <activeByDefault>true</activeByDefault>
        </activation>
    </profile>
</profiles>

<build>
    <finalName>ZZZ</finalName>

    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
        </resource>
    </resources>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>

        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <failOnMissingWebXml>false</failOnMissingWebXml>
                <webResources>
                    <resource>
                        <!-- this is relative to the pom.xml directory -->
                        <directory>../angular/dist/</directory>
                    </resource>
                </webResources>
            </configuration>
        </plugin>

    </plugins>
</build>

【问题讨论】：

你能分享你的 POM 文件吗？我最初的猜测是您缺少 org.json:json 依赖项的版本。
无关：您的 pdfbox 版本已过时。

标签： java maven spring-boot noclassdeffounderror classnotfoundexception

【解决方案1】：

您的 Spring Boot 父级的版本定义 (<version>RELEASE</version>) 不正确。

定义spring boot parent的正确方法是-

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.0.RELEASE</version>

    <relativePath />
</parent>

【讨论】：

我尝试添加版本，但问题仍然存在。

【解决方案2】：

您的类路径似乎有多个 org.json:json 依赖项。

看一下：
org.springframework.boot:spring-boot-starter-test 依赖于
com.jayway.jsonpath:json-path，而这又带来了比您的版本老得多的
org.json:json (v. 20140107)

您可以尝试从spring-boot-starter-test 中排除这种传递依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
        </exclusion>
    </exclusions>
</dependency>

...但是json-path 中的某些内容可能依赖于较旧的 json 库中的某些内容，该库已不再存在于较新版本中，因此请谨慎操作并彻底测试所有内容。

也有可能是别的东西带来org.json:json。

要验证，请运行mvn dependency:tree 并在生成的输出中搜索org.json:json。

【讨论】：

我什至无法运行 mvn dependency:tree 也看不到与此相关的错误 ('dependencies.dependency.version' for org.json:json:jar is missing.@ line 59, column 21)。我尝试了排除，但不起作用
我从 .m2 文件夹中删除了存储库文件，并尝试运行 mvn clean install，它运行了 3 秒钟，然后弹出了相同的错误。我会尝试重写我的 pom.xml 文件。
将版本添加到显式导入中，然后运行mvn dependency:tree

【解决方案3】：

Spring Boot 2.0 于 2018 年 3 月 1 日发布。在此之前，Spring Boot 的最新 RELEASE 版本是 1.5.x。

将 Spring Boot 版本设置为 1.5.12.RELEASE 并重试：

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.12.RELEASE</version>

    <relativePath />
</parent>

【讨论】：