Spring Boot和Jersey产生ClassNotFound

小编典典

Spring Boot和Jersey产生ClassNotFound

spring-boot

我正在尝试打包使用Jersey的Spring Boot App。在开发过程中启动应用程序时，它没有运行问题，当我使用以下命令生成jar文件时，就会出现问题

mvnw package && java -jar target/gs-spring-boot-docker-0.1.0.jar

从而产生以下错误。

创建名称为’org.springframework.boot.autoconfigure.jersey.JerseyAutoConfiguration’的bean时出错：通过构造函数参数1表示的依赖关系未得到满足；嵌套的异常是org.springframework.beans.factory.BeanCreationException：创建URL
[jar：file：.. path / Backend / target / celulascontentas-2.0.jar！/ BOOT-INF /
classes！ / tech / aabo / celulascontenta s / config /
JerseyConfig.class]：实例化Bean失败；嵌套的异常是org.springframework.beans.BeanInstantiationException：无法实例化[tech.aabo.ce
lulascontentas.config.JerseyConfig]：构造方法抛出了异常；嵌套的异常是org.glassfish.jersey.server.internal.scanning.ResourceFinderException：java.io.File
NotFoundException：..path \ Backend \ target \ celulascontentas-2.0.jar！

我的Jersey Config如下所示：

package tech.aabo.celulascontentas.config;

import com.fasterxml.jackson.jaxrs.json.JacksonJaxbJsonProvider;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.server.ServerProperties;
import org.springframework.stereotype.Component;

import javax.ws.rs.ApplicationPath;

@Component
@ApplicationPath("/api")
public class JerseyConfig extends ResourceConfig {

    public JerseyConfig() {
        register(JacksonJaxbJsonProvider.class);
        packages("tech.aabo.celulascontentas.endpoint");
        property(ServerProperties.BV_SEND_ERROR_IN_RESPONSE, true);
    }
}

我的pom.xml看起来像：

<?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>tech.aabo</groupId>
    <artifactId>celulascontentas</artifactId>
    <version>2.0</version>
    <packaging>jar</packaging>

    <name>celulascontentas</name>
    <description>API para celulas contentas</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
    </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>
        <!-- Core -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jersey</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jetty</artifactId>
        </dependency>

        <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

        <!-- DB -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- Extra -->

        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.3</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.7</version>
        </dependency>

        <dependency>
            <groupId>com.amazonaws</groupId>
            <artifactId>aws-java-sdk</artifactId>
            <version>1.11.133</version>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
            <plugin>
                <artifactId>maven-resources-plugin</artifactId>
                <executions>
                    <execution>
                        <id>copy-resources</id>
                        <phase>validate</phase>
                        <goals>
                            <goal>copy-resources</goal>
                        </goals>
                        <configuration>
                            <outputDirectory>${basedir}/target/</outputDirectory>
                            <resources>
                                <resource>
                                    <directory>src/main/resources</directory>
                                    <filtering>true</filtering>
                                </resource>
                            </resources>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

我尝试了各种组合，但始终会产生相同的错误。那些人现在如何解决它？

谢谢

阅读 375

2020-05-30

共1个答案

小编典典

Jersey类路径扫描限制

可执行jar布局的更改意味着，Jersey的类路径扫描中的限制现在会影响可执行jar文件以及可执行war文件。要变通解决此问题，您希望由Jersey扫描的类应打包在jar中，并作为依赖项包含在BOOT-
INF / lib中。然后，应将Spring Boot启动器配置为在启动时解压缩这些jar，以便Jersey可以扫描其内容。

这是一个已知的问题，有一个开放的拉那不是合并尚未请求。我建议您参考此问题，其中提到一些解决方法。

解决方法很少

配置Boot的Maven插件以解压缩包含该软件包的jar

使用以下解决方法

jersey 1:

import java.util.Map;

import javax.annotation.PostConstruct;
import javax.ws.rs.Path;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

import com.sun.jersey.api.core.DefaultResourceConfig;

@Component
public class RestApplication extends DefaultResourceConfig {

    private static final Logger log = LoggerFactory.getLogger(RestApplication.class);

    public RestApplication() {
        getFeatures().put("com.sun.jersey.api.json.POJOMappingFeature", true);
    }

    @Autowired
    ApplicationContext appCtx;

    @PostConstruct
    public void setup() {
        log.info("Rest classes found:");
        Map<String,Object> beans = appCtx.getBeansWithAnnotation(Path.class);
        for (Object o : beans.values()) {
            log.info(" -> " + o.getClass().getName());
            getSingletons().add(o);
        }
    }

}
and

    @Autowired
    RestApplication restApplication;

    @Bean
    public ServletRegistrationBean jersey() {
        ServletRegistrationBean bean = new ServletRegistrationBean();
        bean.setServlet(new ServletContainer(restApplication));
        bean.addInitParameter("com.sun.jersey.api.json.POJOMappingFeature", "true");
        bean.setUrlMappings(Arrays.asList("/rest/*"));
        return bean;
    }
jersery2:

import java.util.Map;

import javax.annotation.PostConstruct;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.Path;

import org.glassfish.jersey.server.ResourceConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.stereotype.Component;

import com.sun.jersey.api.core.ResourceConfig;

@Component
@ApplicationPath("/rest")
public class JerseyConfig extends ResourceConfig {

    private static final Logger log = LoggerFactory.getLogger(JerseyConfig.class);

    @Autowired
    ApplicationContext appCtx;

    @PostConstruct
    public void setup() {
        log.info("Rest classes found:");
        Map<String,Object> beans = appCtx.getBeansWithAnnotation(Path.class);
        for (Object o : beans.values()) {
            log.info(" -> " + o.getClass().getName());
            register(o);
        }
    }

}

2020-05-30