Couldnotfind 'org.apache.flink.table.delegation.ExecutorFactory' in theclasspath

```Exception in thread "main" org.apache.flink.table.api.ValidationException: Could not find any factories that implement 'org.apache.flink.table.delegation.ExecutorFactory' in the classpath.
        at org.apache.flink.table.factories.FactoryUtil.discoverFactory(FactoryUtil.java:533)
        at org.apache.flink.table.api.internal.TableEnvironmentImpl.create(TableEnvironmentImpl.java:278)
        at org.apache.flink.table.api.TableEnvironment.create(TableEnvironment.java:93)
        at com.kk.MongoDB2.RecommendationSystem.main(RecommendationSystem.java:36) 
        
        或者
Exception in thread "main" org.apache.flink.table.api.ValidationException: Could not find any factories that implement 'org.apache.flink.table.factories.FileSystemFormatFactory' in the classpath.
	at org.apache.flink.table.factories.FactoryUtil.discoverFactory(FactoryUtil.java:229)
	at org.apache.flink.table.filesystem.FileSystemTableFactory.createFormatFactory(FileSystemTableFactory.java:112)
	at org.apache.flink.table.filesystem.FileSystemTableSource.getInputFormat(FileSystemTableSource.java:143)
	at org.apache.flink.table.filesystem.FileSystemTableSource.getDataStream(FileSystemTableSource.java:127)
	at org.apache.flink.table.planner.plan.nodes.physical.PhysicalLegacyTableSourceScan.getSourceTransformation(PhysicalLegacyTableSourceScan.scala:82)
	at org.apache.flink.table.planner.plan.nodes.physical.batch.BatchExecLegacyTableSourceScan.translateToPlanInternal(BatchExecLegacyTableSourceScan.scala:95)
	at org.apache.flink.table.planner.plan.nodes.physical.batch.BatchExecLegacyTableSourceScan.translateToPlanInternal(BatchExecLegacyTableSourceScan.scala:57)
	at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:58)
因为Flink 加载 table Factory 使用的时SPI机制，而正常的flink jar包是不包含META-INF.services 路径的，需要自己去添加  


## 方法二 maven 添加插件（推荐） 

```js```
<build>
        <plugins>

            <!-- Java Compiler -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>${target.java.version}</source>
                    <target>${target.java.version}</target>
                </configuration>
            </plugin>

            <!-- We use the maven-shade plugin to create a fat jar that contains all necessary dependencies. -->
            <!-- Change the value of <mainClass>...</mainClass> if your program entry point changes. -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>3.1.1</version>
                <executions>
                    <!-- Run shade goal on package phase -->
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <!--<transformers combine.children="append">
                                &lt;!&ndash; The service transformer is needed to merge META-INF/services files &ndash;&gt;
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                                &lt;!&ndash; ... &ndash;&gt;
                            </transformers>-->
<!--                            合并多个connetor 的META-INF.services 文件-->
                            <transformers>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
                                    <resource>reference.conf</resource>
                                </transformer>
                                <!-- The service transformer is needed to merge META-INF/services files -->
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ServicesResourceTransformer"/>
                                <transformer implementation="org.apache.maven.plugins.shade.resource.ApacheNoticeResourceTransformer">
                                    <projectName>Apache Flink</projectName>
                                    <encoding>UTF-8</encoding>
                                </transformer>
                            </transformers>
<!--                                自动排除不使用的类，缩小jar包体积-->
<!--                            <minimizeJar>true</minimizeJar>-->
                            <artifactSet>
                                <excludes>
                                    <exclude>org.apache.flink:force-shading</exclude>
                                    <exclude>org.slf4j:*</exclude>
                                    <exclude>org.apache.logging.log4j:*</exclude>
                                </excludes>
                                <!--<includes>
                                    <indlude>com.aliyun.openservices:flink-log-connector</indlude>
                                    <indlude>com.alibaba.hologres:hologres-connector-flink-1.12</indlude>
                                    <indlude>com.google.guava:guava</indlude>
                                    <indlude>org.projectlombok:lombok</indlude>
                                </includes>-->
                            </artifactSet>
                            <filters>
                                <filter>
                                    <!-- Do not copy the signatures in the META-INF folder.
                                    Otherwise, this might cause SecurityExceptions when using the JAR. -->
                                    <artifact>*:*</artifact>
                                    <excludes>
                                        <exclude>module-info.class</exclude>
                                        <exclude>META-INF/*.SF</exclude>
                                        <exclude>META-INF/*.DSA</exclude>
                                        <exclude>META-INF/*.RSA</exclude>
                                    </excludes>
                                </filter>
                            </filters>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>