Question

我试图让app引擎maven项目运行并且似乎已经发现自己在JAR地狱。该项目过去已经建立并运行，没有使用maven，但我已经有足够的Eclipse废话，并且我试图通过所有常见原因对项目进行编组。

目前一切正在进行编译，测试正在传递（来自mvn clean install目录shown here的myproject-war）。我也可以从mvn appengine:devserver目录启动myproject-ear并启动服务器。但是，导航到我的一个servlet，我得到如下所示的noSuchMethodError跟踪。（为了便于阅读，所有代码都在底部。）

这与other posts类似，其中杰克逊版本并未同步。但是，我的杰克逊版本似乎还可以，我的pom.xml也可以在底部看到。似乎该方法didn't appear until Jackson 3.0，由于mvn dependency:tree -Dverbose | ack jackson的输出以及我依赖于2.4.1的事实再次看起来不错。

我能想到的最可能的罪魁祸首是我使用的谷歌图书馆，因为我跟随example here似乎依赖它。但是，我不确定如何测试该假设或让谷歌图书馆在没有依赖性的情况下工作。可能是<exlcudes>标签，但我不确定如何应用它。

有没有人有任何我失踪的建议或事情？如何获取要在运行时使用的类的正确版本？或者我错过了什么，解决方案是完全不同的？

编辑：请注意，根据评论/回答的建议，我确保我负责的所有库都使用相同版本的fastxml / Jackson而不是旧的codehaus packaing。我同意似乎某个地方仍有较旧的依赖导致问题，但这正是我正在努力纠正的问题。

编辑2 ：我最终完成了这项工作，因为我清理了整个项目和依赖结构，尽管我无法提供确切的解决方案。我认为问题是由于这种依赖性：

<dependency>
  <groupId>com.fasterxml.jackson.jaxrs</groupId>
  <artifactId>jackson-jaxrs-json-provider</artifactId>
  <version>2.4.1</version>
</dependency>

org.jboss.resteasy:resteasy-jackson2-provider:3.0.6.Final上的has a dependency depends on，其本身{{3}} com.fasterxml.jackson.core:jackson-databind:2.2.1，没有丢失的方法，正如我在原帖中所指出的那样。< / p>

mvn dependency:tree -Dverbose | ack jackson：

[INFO] +- com.fasterxml.jackson.jaxrs:jackson-jaxrs-json-provider:jar:2.4.1:compile
[INFO] |  +- com.fasterxml.jackson.jaxrs:jackson-jaxrs-base:jar:2.4.1:compile
[INFO] |  |  +- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] |  |  \- (com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile - omitted for duplicate)
[INFO] |  +- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] |  +- (com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile - omitted for duplicate)
[INFO] |  \- com.fasterxml.jackson.module:jackson-module-jaxb-annotations:jar:2.4.1:compile
[INFO] |     +- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] |     \- (com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile - omitted for duplicate)
[INFO] +- com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.4.1:compile
[INFO] |  +- com.fasterxml.jackson.core:jackson-annotations:jar:2.4.0:compile
[INFO] |  \- (com.fasterxml.jackson.core:jackson-core:jar:2.4.1:compile - omitted for duplicate)
[INFO] |  +- com.google.http-client:google-http-client-jackson2:jar:1.19.0:compile
[INFO] |  |  \- (com.fasterxml.jackson.core:jackson-core:jar:2.1.3:compile - omitted for conflict with 2.4.1)
[INFO] +- org.codehaus.jackson:jackson-mapper-asl:jar:1.9.13:test
[INFO] |  \- org.codehaus.jackson:jackson-core-asl:jar:1.9.13:test

异常追踪：

java.lang.NoSuchMethodError: com.fasterxml.jackson.core.JsonFactory.requiresPropertyOrdering()Z
    at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:458)
    at com.fasterxml.jackson.databind.ObjectMapper.<init>(ObjectMapper.java:379)
    at com.fasterxml.jackson.jaxrs.json.JsonMapperConfigurator.getDefaultMapper(JsonMapperConfigurator.java:44)
    at com.fasterxml.jackson.jaxrs.base.ProviderBase.locateMapper(ProviderBase.java:856)
    at com.fasterxml.jackson.jaxrs.base.ProviderBase.writeTo(ProviderBase.java:588)
    at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.writeTo(AbstractWriterInterceptorContext.java:129)
    at org.jboss.resteasy.core.interception.ServerWriterInterceptorContext.writeTo(ServerWriterInterceptorContext.java:62)
    at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:118)
    at org.jboss.resteasy.plugins.interceptors.encoding.GZIPEncodingInterceptor.aroundWriteTo(GZIPEncodingInterceptor.java:100)
    at org.jboss.resteasy.core.interception.AbstractWriterInterceptorContext.proceed(AbstractWriterInterceptorContext.java:122)
    at org.jboss.resteasy.core.ServerResponseWriter.writeNomapResponse(ServerResponseWriter.java:99)
    at org.jboss.resteasy.core.SynchronousDispatcher.writeResponse(SynchronousDispatcher.java:427)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:376)
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179)
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220)
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56)
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
    at com.google.appengine.api.socket.dev.DevSocketFilter.doFilter(DevSocketFilter.java:74)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.ResponseRewriterFilter.doFilter(ResponseRewriterFilter.java:127)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:34)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:63)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectRequest(DevAppServerModulesFilter.java:366)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doDirectModuleRequest(DevAppServerModulesFilter.java:349)
    at com.google.appengine.tools.development.DevAppServerModulesFilter.doFilter(DevAppServerModulesFilter.java:116)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:98)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:491)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:547)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

我的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>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<groupId>org.mygroupid</groupId>
<artifactId>myproject-server-war</artifactId>

<parent>
    <groupId>org.mygroupid</groupId>
    <artifactId>myproject-server</artifactId>
    <version>1.0-SNAPSHOT</version>
</parent>

<properties>
    <appengine.app.version>1-war</appengine.app.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <!-- Compile/runtime dependencies -->
    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-api-1.0-sdk</artifactId>
        <version>${appengine.target.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.31</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.jaxrs</groupId>
      <artifactId>jackson-jaxrs-json-provider</artifactId>
      <version>2.4.1</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.4.1</version>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.4.1</version>
    </dependency>

    <dependency>
      <groupId>joda-time</groupId>
      <artifactId>joda-time</artifactId>
      <version>2.3</version>
    </dependency>


    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.2.8.Final</version>
    </dependency>

    <dependency>
      <groupId>org.hibernate.common</groupId>
      <artifactId>hibernate-commons-annotations</artifactId>
      <version>4.0.4.Final</version>
    </dependency>

    <dependency>
      <groupId>org.jboss.resteasy</groupId>
      <artifactId>resteasy-jaxrs</artifactId>
      <version>3.0.8.Final</version>
    </dependency>

    <dependency>
      <groupId>com.google.api-client</groupId>
      <artifactId>google-api-client</artifactId>
      <version>1.19.0</version>
    </dependency>

    <dependency>
      <groupId>com.google.api-client</groupId>
      <artifactId>google-api-client-gson</artifactId>
      <version>1.19.0</version>
    </dependency>



    <!-- Our custom common jar. -->
    <dependency>
        <groupId>groupid</groupId>
        <artifactId>myproject-common</artifactId>
        <version>0.1-SNAPSHOT</version>
    </dependency>

    <!-- Test Dependencies -->
    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-testing</artifactId>
        <version>${appengine.target.version}</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-api-stubs</artifactId>
        <version>${appengine.target.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.mockito</groupId>
        <artifactId>mockito-all</artifactId>
        <version>1.9.0</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>groupdId</groupId>
        <artifactId>myproject-common</artifactId>
        <version>0.1-SNAPSHOT</version>
        <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>1.9.13</version>
      <scope>test</scope>
    </dependency>


    <dependency>
      <groupId>org.easytesting</groupId>
      <artifactId>fest-assert-core</artifactId>
      <version>2.0M10</version>
      <scope>test</scope>
    </dependency>


</dependencies>

<build>
    <outputDirectory>target/${project.artifactId}-${project.version}/WEB-INF/classes</outputDirectory> 

    <plugins>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.1</version>
        <configuration>
            <source>1.7</source>
            <target>1.7</target>
        </configuration>
    </plugin>

        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.3</version>
            <configuration>
                <archiveClasses>true</archiveClasses>
                <webResources>
                    <!-- in order to interpolate version from pom into appengine-web.xml -->
                    <resource>
                        <directory>${basedir}/src/main/webapp/WEB-INF</directory>
                        <filtering>true</filtering>
                        <targetPath>WEB-INF</targetPath>
                    </resource>
                </webResources>
            </configuration>
        </plugin>
    </plugins>
</build>

Answer 1

这是GAE 1.9.7

对我有用的

属性

<properties>
    <appengine.target.version>1.9.7</appengine.target.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <resteasy.version>3.0.8.Final</resteasy.version>
    <jackson.version>2.4.1</jackson.version>
    <slf4j.version>1.7.7</slf4j.version>
    <reflections.version>0.9.9-RC2</reflections.version>
</properties>

依赖关系管理

<dependencyManagement>

    <dependencies>

        <!-- Third Party Dependencies -->

        <dependency>
            <groupId>com.google.code.findbugs</groupId>
            <artifactId>findbugs</artifactId>
            <version>3.0.0</version>
        </dependency>

        <dependency>
            <groupId>org.reflections</groupId>
            <artifactId>reflections</artifactId>
            <version>${reflections.version}</version>
        </dependency>

        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>17.0</version>
        </dependency>

        <dependency>
            <groupId>com.google.inject</groupId>
            <artifactId>guice</artifactId>
            <version>3.0</version>
        </dependency>

        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-1.0-sdk</artifactId>
            <version>${appengine.target.version}</version>
        </dependency>

        <dependency>
            <groupId>com.google.appengine.tools</groupId>
            <artifactId>appengine-gcs-client</artifactId>
            <version>0.4</version>
        </dependency>

        <dependency>
            <groupId>com.googlecode.objectify</groupId>
            <artifactId>objectify</artifactId>
            <version>5.0.3</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>jaxrs-api</artifactId>
            <version>${resteasy.version}</version>
        </dependency>

        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jaxrs</artifactId>
            <version>${resteasy.version}</version>
        </dependency>

        <dependency>
            <groupId>org.jboss.resteasy</groupId>
            <artifactId>resteasy-jackson2-provider</artifactId>
            <version>${resteasy.version}</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>${jackson.version}</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.jaxrs</groupId>
            <artifactId>jackson-jaxrs-json-provider</artifactId>
            <version>${jackson.version}</version>
        </dependency>

        <!-- Test Dependencies -->

        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-testing</artifactId>
            <version>${appengine.target.version}</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-stubs</artifactId>
            <version>${appengine.target.version}</version>
            <scope>test</scope>
        </dependency>

    </dependencies>

</dependencyManagement>

依赖关系

<dependencies>

    <dependency>
        <groupId>com.google.code.findbugs</groupId>
        <artifactId>findbugs</artifactId>
    </dependency>

    <dependency>
        <groupId>org.reflections</groupId>
        <artifactId>reflections</artifactId>
    </dependency>

    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
    </dependency>

    <dependency>
        <groupId>com.google.inject</groupId>
        <artifactId>guice</artifactId>
    </dependency>

    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-api-1.0-sdk</artifactId>
        <version>${appengine.target.version}</version>
    </dependency>

    <dependency>
        <groupId>com.google.appengine.tools</groupId>
        <artifactId>appengine-gcs-client</artifactId>
        <version>0.4</version>
    </dependency>

    <dependency>
        <groupId>com.googlecode.objectify</groupId>
        <artifactId>objectify</artifactId>
        <version>5.0.3</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>

    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>jaxrs-api</artifactId>
        <version>${resteasy.version}</version>
    </dependency>

    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-jaxrs</artifactId>
        <version>${resteasy.version}</version>
    </dependency>

    <dependency>
        <groupId>org.jboss.resteasy</groupId>
        <artifactId>resteasy-jackson2-provider</artifactId>
        <version>${resteasy.version}</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>${jackson.version}</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson.version}</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.jaxrs</groupId>
        <artifactId>jackson-jaxrs-json-provider</artifactId>
        <version>${jackson.version}</version>
    </dependency>

    <!-- Test Dependencies -->

    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-testing</artifactId>
        <version>${appengine.target.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-api-stubs</artifactId>
        <version>${appengine.target.version}</version>
        <scope>test</scope>
    </dependency>

</dependencies>

Answer 2

适合我：

首先，检查并删除项目中包含这些名称的所有库：

Jackson Databind 
Jackson Core
Jackson Annotations

因为你可能在java proyect中重复了一些..

第二，去http://mvnrepository.com/artifact/com.fasterxml.jackson.core 并使用此特定版本下载3个罐子（28/04/2016是最后一个版本）：

Jackson Databind  - version 2.73   
Jackson Core   - version 2.73     
Jackson Annotations   - version 2.73

第三，为您的控制器导入

 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
...

ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
String json = json = ow.writeValueAsString(object);

并且不要忘记你的对象

@XmlRootElement(name = "UsuarioDTO")
@XmlAccessorType(XmlAccessType.FIELD)
public class UserDto implements Serializable {
...
}

-Rebuild / Redeploy（和调试因为你可能会得到一个不同的错误并可能与之前的错误相混淆）

Jackson NoSuchMethodError需要在运行时使用谷歌应用程序引擎项目的属性订单maven

2 个答案:

这是GAE 1.9.7

属性

依赖关系管理

依赖关系