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问
SpringBoot多Module打包无法找到类
module  maven  springboot  憧憬Licoy 2017年09月13日提问
 1 关注
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问题对人有帮助，内容完整，我也想知道答案0 问题没有实际价值，缺少关键内容，没有改进余地
parent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>cn.licoy</groupId>
    <artifactId>parent</artifactId>
    <version>0.1</version>
    <packaging>pom</packaging>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.6.RELEASE</version>
    </parent>

    <modules>
        <module>../rest</module>
        <module>../service</module>
    </modules>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.16</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <mainClass>cn.licoy.rest.RestApplication</mainClass>
                    <layout>ZIP</layout>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal><!--可以把依赖的包都打包到生成的Jar包中-->
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>
直接在IDEA里面运行SpringBoot启动类是可以正常访问的，但是使用mvn install打包后，报出如下错误：

2017-09-13 16:47:09.318 ERROR 5292 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[disp
atcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context
 with path [] threw exception [Handler dispatch failed; nested exception is java
.lang.NoClassDefFoundError: cn/licoy/service/entity/User] with root cause

java.lang.ClassNotFoundException: cn.licoy.service.entity.User
        at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.8.0_131]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_131]
        at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(Laun
chedURLClassLoader.java:94) ~[rest-0.1.jar:0.1]
        at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.8.0_131]
        at cn.licoy.rest.controller.UserController.list(UserController.java:24)
~[classes!/:0.1]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.
0_131]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.8.
0_131]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:
1.8.0_131]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.8.0_131]
        at org.springframework.web.method.support.InvocableHandlerMethod.doInvok
e(InvocableHandlerMethod.java:205) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELE
ASE]
        at org.springframework.web.method.support.InvocableHandlerMethod.invokeF
orRequest(InvocableHandlerMethod.java:133) ~[spring-web-4.3.10.RELEASE.jar!/:4.3
.10.RELEASE]
        at org.springframework.web.servlet.mvc.method.annotation.ServletInvocabl
eHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97) ~[spring-w
ebmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingH
andlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[sprin
g-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.springframework.web.servlet.mvc.method.annotation.RequestMappingH
andlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-web
mvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapt
er.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.10.RELEASE.j
ar!/:4.3.10.RELEASE]
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(Dispatch
erServlet.java:967) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.springframework.web.servlet.DispatcherServlet.doService(Dispatche
rServlet.java:901) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.springframework.web.servlet.FrameworkServlet.processRequest(Frame
workServlet.java:970) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServl
et.java:861) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[tomcat
-embed-core-8.5.16.jar!/:8.5.16]
        at org.springframework.web.servlet.FrameworkServlet.service(FrameworkSer
vlet.java:846) ~[spring-webmvc-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[tomcat
-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:231) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52
) ~[tomcat-embed-websocket-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(
RequestContextFilter.java:99) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInter
nal(HttpPutFormContentFilter.java:105) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.
RELEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInterna
l(HiddenHttpMethodFilter.java:81) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEA
SE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterIntern
al(CharacterEncodingFilter.java:197) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RE
LEASE]
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:107) ~[spring-web-4.3.10.RELEASE.jar!/:4.3.10.RELEASE]
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:193) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:166) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:198) ~[tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:96) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(Authentica
torBase.java:478) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:140) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:80) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:87) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:342) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java
:799) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLig
ht.java:66) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(Abstract
Protocol.java:868) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpo
int.java:1455) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBas
e.java:49) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na
:1.8.0_131]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [n
a:1.8.0_131]
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskTh
read.java:61) [tomcat-embed-core-8.5.16.jar!/:8.5.16]
        at java.lang.Thread.run(Unknown Source) [na:1.8.0_131]
其中,Springboot启动包是rest包，当中引用了service包中的User类，在打包之后的rest.jar里面lib目录下有service.jar，但是一访问就找不到类，这是怎么回事？

2017年09月13日提问评论邀请回答编辑

 
1个回答
答案对人有帮助，有参考价值1 答案没帮助，是错误的答案，答非所问

已采纳
问题找到了，要给被依赖的module的pom.xml中添加

<build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <classifier>exec</classifier>
                </configuration>
            </plugin>
        </plugins>
    </build>
2017年09月13日回答评论赞赏编辑

憧憬Licoy
584 声望
撰写答案

撰写答案...
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