配置feign之后无法启动

Question

有没大神帮帮我啊，。，已经2天了。。。快疯了

我之前用restTemplate实现远程调用时可以的，但是配置了feign之后服务就起不来了。。。

我的pom文件是在这样的：

<?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>com.mzd</groupId>
    <artifactId>order4feign</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>order4feign</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </parent>
    <!-- 管理依赖 -->
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Finchley.M7</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <!-- SpringBoot整合Web组件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- SpringBoot整合eureka客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        </dependency>
        <!-- SpringBoot整合fegnin客户端 -->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

    </dependencies>
    <!-- 注意： 这里必须要添加， 否者各种依赖有问题 -->
    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>


</project>

main启动类：

package com.mzd.order4feign;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.eureka.EnableEurekaClient;
import org.springframework.cloud.openfeign.EnableFeignClients;
@SpringBootApplication
@EnableEurekaClient
@EnableFeignClients
public class Order4feignApplication {
    public static void main(String[] args) {
        SpringApplication.run(Order4feignApplication.class, args);
    }

}

controller层：

package com.mzd.order4feign.api.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.mzd.order4feign.fegin.IMember;

@RestController
public class OrderApi {
    @Autowired
    private IMember memberApifeign;

    @RequestMapping("/feignMember")
    public String feignMember() {
        return memberApifeign.Member();
    }
}

feign类：

package com.mzd.order4feign.fegin;

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;

@FeignClient(name = "mzd-member", fallback = MemberFallBack.class)
public interface IMember {
    @RequestMapping("/getmember")
    public String Member();
}

个人觉得也没有哪里不对啊，但是就一直报错：

2018-09-29 16:41:02.361  INFO 30916 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@245b4bdc: startup date [Sat Sep 29 16:41:02 CST 2018]; root of context hierarchy
2018-09-29 16:41:02.598  INFO 30916 --- [           main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2018-09-29 16:41:02.628  INFO 30916 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'configurationPropertiesRebinderAutoConfiguration' of type [org.springframework.cloud.autoconfigure.ConfigurationPropertiesRebinderAutoConfiguration$$EnhancerBySpringCGLIB$$2de3e64e] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.0.1.RELEASE)

2018-09-29 16:41:03.176  INFO 30916 --- [           main] c.m.order4feign.Order4feignApplication   : No active profile set, falling back to default profiles: default
2018-09-29 16:41:03.209  INFO 30916 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@291a7e3c: startup date [Sat Sep 29 16:41:03 CST 2018]; parent: org.springframework.context.annotation.AnnotationConfigApplicationContext@245b4bdc
2018-09-29 16:41:03.862  INFO 30916 --- [           main] o.s.cloud.context.scope.GenericScope     : BeanFactory id=14bd7a9f-bf63-3980-b6ba-8ecf6f39f46c
2018-09-29 16:41:03.878  INFO 30916 --- [           main] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2018-09-29 16:41:03.888  WARN 30916 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'methodValidationPostProcessor' defined in class path resource [org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.class]: Unsatisfied dependency expressed through method 'methodValidationPostProcessor' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.mzd.order4feign.fegin.IMember': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.openfeign.FeignClientFactoryBean] from ClassLoader [sun.misc.Launcher$AppClassLoader@2a139a55]
2018-09-29 16:41:03.898  INFO 30916 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-09-29 16:41:03.898 ERROR 30916 --- [           main] o.s.boot.SpringApplication               : Application run failed

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'methodValidationPostProcessor' defined in class path resource [org/springframework/boot/autoconfigure/validation/ValidationAutoConfiguration.class]: Unsatisfied dependency expressed through method 'methodValidationPostProcessor' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.mzd.order4feign.fegin.IMember': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.openfeign.FeignClientFactoryBean] from ClassLoader [sun.misc.Launcher$AppClassLoader@2a139a55]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:729) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:470) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:541) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:501) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:204) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:226) ~[spring-context-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:710) ~[spring-context-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:535) ~[spring-context-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:395) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1255) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1243) [spring-boot-2.0.1.RELEASE.jar:2.0.1.RELEASE]
    at com.mzd.order4feign.Order4feignApplication.main(Order4feignApplication.java:13) [classes/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'com.mzd.order4feign.fegin.IMember': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.openfeign.FeignClientFactoryBean] from ClassLoader [sun.misc.Launcher$AppClassLoader@2a139a55]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:262) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1198) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1123) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getSingletonFactoryBeanForTypeCheck(AbstractAutowireCapableBeanFactory.java:946) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryBean(AbstractAutowireCapableBeanFactory.java:829) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.isTypeMatch(AbstractBeanFactory.java:562) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:427) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:390) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.BeanFactoryUtils.beanNamesForTypeIncludingAncestors(BeanFactoryUtils.java:208) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1276) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1101) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1065) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:815) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:721) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    ... 19 common frames omitted
Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springframework.cloud.openfeign.FeignClientFactoryBean] from ClassLoader [sun.misc.Launcher$AppClassLoader@2a139a55]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:659) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:556) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:541) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:245) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    ... 32 common frames omitted
Caused by: java.lang.NoClassDefFoundError: feign/Feign$Builder
    at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_77]
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_77]
    at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_77]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:641) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    ... 35 common frames omitted
Caused by: java.lang.ClassNotFoundException: feign.Feign$Builder
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_77]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_77]
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_77]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_77]
    ... 39 common frames omitted

Answer 1

哥,问题解决了没啊

Answer 2

这个问题是扫包没有扫到，你的ServerApp启动类应该放在外面

Answer 3

给个例子，如下：

此外，看看这个类 methodValidationPostProcessor 是不是有问题

import com.baomidou.mybatisplus.plugins.Page;
import com.ehl.mps.config.FeignConfiguration;
import com.ehl.mpsappsis.persistence.model.AlarmBaseInfo;
import com.ehl.mpsappsutil.web.vo.AjaxMessage;
import com.ehl.mpsappsutil.web.vo.BtPageReq;
import org.springframework.cloud.netflix.feign.FeignClient;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.List;

/**
 * <p>
 * 终端管理表
 服务类
 * </p>
 *
 * @author Heidi Zhou
 * @since 2018-06-06
 */
@FeignClient(value = "${appsweb.appis.name}", path = "${appsweb.appis.context-path}", configuration = FeignConfiguration.class)
public interface AlarmBaseInfoService {


    /**
     * 联表分页查询
     * @param btPageReq
     * @param alarmID
     * @param alarmLevel
     * @param alarmType
     * @param cjr
     * @param scddsj1
     * @param finishTime1
     * @return
     */
    @RequestMapping(value = "/alarmBaseInfo/list", method = RequestMethod.POST, consumes="application/json")
    AjaxMessage<Page<AlarmBaseInfo>> list(@RequestBody BtPageReq btPageReq,
                                          @RequestParam(value = "alarmID", required = false) String alarmID,
                                          @RequestParam(value = "alarmLevel", required = false) String alarmLevel,
                                          @RequestParam(value = "alarmType", required = false) String alarmType,
                                          @RequestParam(value = "cjr", required = false) String cjr,
                                          @RequestParam(value = "scddsj1", required = false) String scddsj1,
                                          @RequestParam(value = "scddsj2", required = false) String scddsj2,
                                          @RequestParam(value = "finishTime1", required = false) String finishTime1,
                                          @RequestParam(value = "finishTime2", required = false) String finishTime2);

    /**
     * 根据警情ID查找详细处理过程-详情
     * @param alarmID
     * @return
     */
    @RequestMapping(value = "/alarmBaseInfo/selectDetailByAlarmId", method = RequestMethod.POST, consumes="application/json")
    AjaxMessage<List<AlarmBaseInfo>> selectDetailByAlarmId(@RequestParam(value = "alarmID", required = false) String alarmID);

}

Answer 4

楼上的意思是：加上请求方法是POST/GET/PUT...

@RequestMapping("/feignMember",method = RequestMethod.GET)
    public String feignMember() {
        return memberApifeign.Member();
    }

Answer 5

feign请求指明请求方式