SpringJava。lang.NoClassDefFoundError:javax/persistence/TableGenerator
我正在尝试使用HibernateJPA开发一个后端应用程序到Tomcat中。 从现在起,它在测试中可以很好地使用JPA功能,并且没有JPA服务的第1个版本现在可以正常工作(文件上传、下载等)
现在我正在集成JPA以应用我们需要的所有功能,但是,即使所有测试工作正常(包括服务测试),当我将来自Postman的请求提交到本地服务器时,我也会收到以下500个错误
这是一个例外:
javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: java.lang.NoClassDefFoundError: javax/persistence/TableGenerators
这是我的pom。xml
<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>com.itvcvr</groupId>
<artifactId>RESTfullApp</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>RESTfullApp Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- https://mvnrepository.com/artifact/junit/junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.xml.bind/jaxb-api -->
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.3.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.activation/activation -->
<dependency>
<groupId>javax.activation</groupId>
<artifactId>activation</artifactId>
<version>1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-catalina -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-catalina</artifactId>
<version>8.5.20</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomcat/tomcat-jdbc -->
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-jdbc</artifactId>
<version>9.0.30</version>
<exclusions>
<exclusion>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-juli</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.ws.rs/javax.ws.rs-api -->
<dependency>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
<version>2.1.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.jersey.core/jersey-server -->
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>2.29</version>
<exclusions>
<exclusion>
<groupId>org.glassfish.hk2.external</groupId>
<artifactId>jakarta.inject</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.jersey.containers/jersey-container-servlet -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>2.29</version>
<exclusions>
<exclusion>
<groupId>org.glassfish.hk2.external</groupId>
<artifactId>jakarta.inject</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.jersey.containers/jersey-container-servlet-core -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
<version>2.29</version>
<exclusions>
<exclusion>
<groupId>org.glassfish.hk2.external</groupId>
<artifactId>jakarta.inject</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.jersey.media/jersey-media-multipart -->
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-multipart</artifactId>
<version>2.29.1</version>
<exclusions>
<exclusion>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-common</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.glassfish.jersey.inject/jersey-hk2 -->
<dependency>
<groupId>org.glassfish.jersey.inject</groupId>
<artifactId>jersey-hk2</artifactId>
<version>2.29.1</version>
<exclusions>
<exclusion>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-common</artifactId>
</exclusion>
<exclusion>
<groupId>org.javassist</groupId>
<artifactId>javassist</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.persistence/javax.persistence-api -->
<dependency>
<groupId>javax.persistence</groupId>
<artifactId>javax.persistence-api</artifactId>
<version>2.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.apache.tomee/javaee-api -->
<dependency>
<groupId>org.apache.tomee</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.16</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate.javax.persistence/hibernate-jpa-2.1-api -->
<dependency>
<groupId>org.hibernate.javax.persistence</groupId>
<artifactId>hibernate-jpa-2.1-api</artifactId>
<version>1.0.0.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>5.4.3.Final</version>
<exclusions>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</exclusion>
<exclusion>
<groupId>net.bytebuddy</groupId>
<artifactId>byte-buddy</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-core -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.4.10.Final</version>
<exclusions>
<exclusion>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<finalName>RESTfullApp</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-enforcer-plugin</artifactId>
<version>1.4.1</version>
<configuration>
<rules><dependencyConvergence/></rules>
</configuration>
</plugin>
</plugins>
</build>
</project>
并且在实体管理器的生成过程中会触发异常
em = Persistence.createEntityManagerFactory("testDb").createEntityManager();
JDBC驱动程序也在eEntity Manager实例之前注册
try {
Class.forName("com.mysql.cj.jdbc.Driver");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
我还使用pluging-exforce来检查是否有任何依赖项在我的pom中创建了任何版本不兼容。xml
这是我必须从0配置的第一个项目,这个问题是我解决问题的最后一个资源
谢谢大家:D
# 1 楼答案
在大多数情况下,此错误表示类加载器找不到代码所依赖的类
在您的例子中,名为javax/persistence/TableGenerators的类应该位于类路径上,但由于某些原因,它不是
TableGenerators类打包在javax中。持久性api-2.2。jar文件
在部署之前。war文件,检查类路径上是否存在required jar-进入您的RESTfullApp。war文件并查看WEB-INF/lib文件夹javax。持久性api-2.2。jar必须在那里,否则修复maven构建以实现这一点
更新
同样值得一提的是,它爆炸了。Tomcat($CATALINA_BASE/webapps/RESTfullApp)中的war文件夹必须具有相同的布局,并且包含在中看到的相同文件集 你的战争档案,检查javax。持久性api-2.2。罐子也在那里
以防出现上述情况。如果类路径上存在jar,我还建议您检查javax。持久性api-2.2。罐子没有破
有时,它碰巧是maven下载失败的。jar存档,这可能会导致您看到的错误。 至少,您可以尝试解压缩这个jar文件,并检查在提取这个jar时是否会有任何错误