springboot2集成activiti7

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.activiti</groupId>
        <artifactId>activiti-spring-boot-starter-basic</artifactId>
        <version>7.1.0.M6</version>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>
</dependencies>

spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=

<?xml version="1.0" encoding="UTF-8"?>
<definitions xmlns="http://www.omg.org/spec/BPMN/20100524/MODEL"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://www.omg.org/spec/BPMN/20100524/MODEL BPMN20.xsd"
             id="Definitions_1"
             targetNamespace="http://bpmn.io/schema/bpmn">
  <process id="simpleProcess" name="Simple Process" isExecutable="true">
    <startEvent id="startEvent1"/>
    <sequenceFlow id="flow1" sourceRef="startEvent1" targetRef="endEvent1"/>
    <endEvent id="endEvent1"/>
  </process>
</definitions>

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class ActivitiDemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(ActivitiDemoApplication.class, args);
    }
}

import org.activiti.engine.RuntimeService;
import org.activiti.engine.runtime.ProcessInstance;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ProcessController {

    @Autowired
    private RuntimeService runtimeService;

    @GetMapping("/start-process")
    public String startProcess() {
        ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("simpleProcess");
        return "Started process instance: " + processInstance.getId();
    }

    @GetMapping("/process-instances")
    public Iterable<ProcessInstance> getProcessInstances() {
        return runtimeService.createProcessInstanceQuery().list();
    }
}