static Map<String,String> cache=new HashMap<String,String>();

public String findUUID(FlowData flowData) {
    String value=cache.get(flowData.getSubTestItem());
    if(value==null)
    {
        String uuid=userMapper.findUUID(flowData);
        cache.put(uuid,value);
        return uuid;
    }
    return value;
}

@Cacheable(value = "FlowData.findUUID", key = "#flowData.subTestItem")
public String findUUID(FlowData flowData) {
    return userMapper.findUUID(flowData);
}

if(flowData.getSubTestItem().length()<2&&flowData.getSubTestItem().length()>7)
{
    return null;
}
if(flowData.getBillNumber()==null)
{
    return null;
}

Map<String, StringBuffer> validate = ValidatorUtil.validate(flowData);
if (validate != null) {
    System.out.println(validate);
    return null;
}

public class FlowData {

    private String uuid;
    //声明该参数的校验规则字符串长度必须在7到20之间
    @Size(min = 7, max = 20, message = "长度必须在{min}-{max}之间")
    private String subTestItem;
    //声明该参数的校验规则字符串不能为空
    @NotBlank(message = "billNumber不能为空")
    private String billNumber;
}

<beans ......
       default-lazy-init="true" default-init-method="init">

    <context:property-placeholder location="classpath:config.properties"/>

    <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url"
                  value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <constructor-arg ref="druidDataSource"></constructor-arg>
    </bean>
    
    <bean id="dataService" class="com.intsmaze.flink.base.service.DataService">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>

</beans>

jdbc.user = intsmaze
jdbc.password = intsmaze
jdbc.url = jdbc:mysql://127.0.0.1:3306/flink-boot?useUnicode=true&characterEncoding=UTF-8

/**
 * github地址: https://github.com/intsmaze
 * 博客地址：https://www.cnblogs.com/intsmaze/
 * 出版书籍《深入理解Flink核心设计与实践原理》  
 *
 * @auther: intsmaze(刘洋)
 * @date: 2020/10/15 18:33
 */
public class SimpleClient extends BaseFlink {

    public static void main(String[] args) throws Exception {
        SimpleClient topo = new SimpleClient();
        topo.run(ParameterTool.fromArgs(args));
    }

    @Override
    public String getTopoName() {
        return "SimpleClient";
    }

    @Override
    public String getConfigName() {
        return "topology-base.xml";
    }

    @Override
    public String getPropertiesName() {
        return "config.properties";
    }

    @Override
    public void createTopology(StreamExecutionEnvironment builder) {

        DataStream<String> inputDataStrem = env.addSource(new SimpleDataSource());

        DataStream<String> processDataStream = inputDataStrem.flatMap(new SimpleFunction());

        processDataStream.print("输出结果");
    }

}

public class SimpleDataSource extends CommonDataSource {

    private static Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create();
	......

    @Override
    public void open(Configuration parameters) throws Exception {
        super.open(parameters);
        ...//构造读取各类外部系统数据的连接实例
    }

    @Override
    public String sendMess() throws InterruptedException {
        Thread.sleep(1000);
		......
        MainData mainData = new MainData();
        ......//通过外部系统数据的连接实例读取外部系统数据，封装进MainData对象中，然后返回即可。
        return gson.toJson(mainData);
    }
}

public class SimpleFunction extends CommonFunction {

    private static Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create();
    
    @Override
    public String execute(String message) throws Exception {
        FlowData flowData = gson.fromJson(message, new TypeToken<FlowData>() {
        }.getType());

        String flowUUID = dataService.findUUID(flowData);
        if (StringUtils.isBlank(flowUUID)) {
            flowUUID = UUID.randomUUID().toString();
            flowData.setUuid(flowUUID);
            dataService.insertFlow(flowData);
        }
        return gson.toJson(flowData);
    }
}

public abstract class CommonFunction extends RichFlatMapFunction<String, String> {

    private IntCounter numLines = new IntCounter();

    protected DataService dataService;

    protected ApplicationContext beanFactory;

    @Override
    public void open(Configuration parameters) {
        getRuntimeContext().addAccumulator("num-FlatMap", this.numLines);

        ExecutionConfig.GlobalJobParameters globalJobParameters = getRuntimeContext()
                .getExecutionConfig().getGlobalJobParameters();
        beanFactory = BeanFactory.getBeanFactory((Configuration) globalJobParameters);

        dataService = beanFactory.getBean(DataService.class);
    }

    @Override
    public void flatMap(String value, Collector<String> out) throws Exception {
        this.numLines.add(1);
        String execute = execute(value);
        if (StringUtils.isNotBlank(execute)) {
            out.collect(execute);
        }
    }

    public abstract String execute(String message) throws Exception;

}

public void open(Configuration parameters){
	super.open(parameters);
	......
	//获取在Spring配置文件中配置的实例
	XXX xxx=beanFactory.getBean(XXX.class);
}

/**
 * 本地启动参数  -isLocal local
 * 集群启动参数  -isIncremental isIncremental
 */
public static void main(String[] args) throws Exception {
    SimpleClient topo = new SimpleClient();
    topo.run(ParameterTool.fromArgs(args));
}

.......     

java.lang.NoClassDefFoundError: org/apache/flink/runtime/state/StateBackend
	at java.lang.Class.getDeclaredMethods0(Native Method)
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
	at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
	at java.lang.Class.getMethod0(Class.java:3018)
	at java.lang.Class.getMethod(Class.java:1784)
	at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
	at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.apache.flink.runtime.state.StateBackend
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 7 more
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" 

Exception in thread "main" java.lang.NullPointerException: isIncremental is null
	at org.apache.flink.util.Preconditions.checkNotNull(Preconditions.java:76)
	at com.intsmaze.flink.base.env.BaseFlink.init(BaseFlink.java:97)
	at com.intsmaze.flink.base.env.BaseFlink.run(BaseFlink.java:213)
	at com.intsmaze.flink.client.RetryClient.main(RetryClient.java:29)

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.intsmaze.flink.base.service.DataService' available
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:348)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:335)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1101)
	at com.intsmaze.flink.base.transform.BuiltinRichFlatMapFunction.open(BuiltinRichFlatMapFunction.java:50)
	at com.intsmaze.flink.retry.task.RetryFlatMap.open(RetryFlatMap.java:39)
	at org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:34)
	at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:102)
	at org.apache.flink.streaming.api.operators.StreamFlatMap.open(StreamFlatMap.java:40)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain.initializeStateAndOpenOperators(OperatorChain.java:426)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.lambda$beforeInvoke$2(StreamTask.java:535)
	at org.apache.flink.streaming.runtime.tasks.StreamTaskActionExecutor$SynchronizedStreamTaskActionExecutor.runThrowing(StreamTaskActionExecutor.java:93)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.beforeInvoke(StreamTask.java:525)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:565)
	at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:755)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:570)
	at java.lang.Thread.run(Thread.java:748)