问题

java.lang.IncompatibleClassChangeError: Found class org.objectweb.asm.MethodVisitor, but interface was expected at org.lilystudio.smarty4j.Template.toParser(Template.java:357)

java.lang.IncompatibleClassChangeError: Found class org.objectweb.asm.MethodVisitor, but interface was expected at org.lilystudio.smarty4j.Template.toParser(Template.java:357) at org.lilystudio.smarty4j.Template.(Template.java:134) at org.lilystudio.smarty4j.Template.(Template.java:152) at org.lilystudio.smarty4j.Engine.getTemplate(Engine.java:317) at com.doit.framework.mvc.core.Doit.render(Doit.java:769) at com.doit.framework.mvc.core.Doit.forwardTo(Doit.java:711) at com.doit.framework.mvc.core.Doit.doPost(Doit.java:286) at com.doit.framework.mvc.core.Doit.doGet(Doit.java:83) at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.doit.framework.mvc.filter.FrameServletFilter.doFilter(FrameServletFilter.java:30) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.doit.framework.mvc.filter.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:32) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:660) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798) at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:808) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498) at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748)

分析

这个错误便表示使用jar包文件的依赖冲突引起的，仔细查看jar包，会发现有同一个jar的版本冲突：

在引入neo4j的jar包中，也包含了对 asm-6.2.jar 的引用。

解决办法

在neo4j的jar包中排除asm的依赖。

        <dependency>
            <groupId>org.neo4j</groupId>
            <artifactId>neo4j</artifactId>
            <version>3.4.14</version>
            <exclusions>
                <!-- Exclude asm -->
                <exclusion>
                    <groupId>org.ow2.asm</groupId>
                    <artifactId>asm</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

# Bug