SpringBoot 整合 Activiti7

一.pom依赖引入

通过该 pom.xml 文件所导入的坐标，我们就可以实现 activiti7 与 Springboot 整合

<!--activiti7与SpringBoot整合的相关依赖-->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.0.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.activiti/activiti-spring-boot-starter -->
        <dependency>
            <groupId>org.activiti</groupId>
            <artifactId>activiti-spring-boot-starter</artifactId>
            <version>7.0.0.Beta2</version>
        </dependency>

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.5</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.27</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

二.配置文件编写

为了能够实现 Activiti7 生成的表放到 Mysql 数据库中，需要在 springboot 的配置文件 application.yml 中添加相关的配置

spring:
  datasource:
    url: jdbc:mysql://localhost:3306/activiti?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
    username : root
    password : root
    driver-class-name: com.mysql.jdbc.Driver
  activiti:
    db-history-used: true  #进行相关activiti操作时，要生成history相关的表
    history-level: full  #history相关表中的历史记录都要被记录

说明：正常如果在配置文件中不加入activiti的配置，是不会生成相关历史记录表的，所以必须加上上面的activiti配置才能在数据库中生成对应的历史记录表

三.添加 SpringSecurity 安全框架整合配置

因为 Activiti7 与 SpringBoot 整合后，默认情况下，集成了 SpringSecurity 安全框架，这样我们就要去准备 SpringSecurity 整合进来的相关用户权限配置信息。

1.添加 SecurityUtil工具类

package com.itheima.activiti;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.stereotype.Component;

import java.util.Collection;

@Component
public class SecurityUtil {

    @Autowired
    private UserDetailsService userDetailsService;

    public void logInAs(String username) {

        UserDetails user = userDetailsService.loadUserByUsername(username);
        if (user == null) {
            throw new IllegalStateException("User " + username + " doesn't exist, please provide a valid user");
        }

        SecurityContextHolder.setContext(new SecurityContextImpl(new Authentication() {
            @Override
            public Collection<? extends GrantedAuthority> getAuthorities() {
                return user.getAuthorities();
            }

            @Override
            public Object getCredentials() {
                return user.getPassword();
            }

            @Override
            public Object getDetails() {
                return user;
            }

            @Override
            public Object getPrincipal() {
                return user;
            }

            @Override
            public boolean isAuthenticated() {
                return true;
            }

            @Override
            public void setAuthenticated(boolean isAuthenticated) throws IllegalArgumentException {

            }

            @Override
            public String getName() {
                return user.getUsername();
            }
        }));
        org.activiti.engine.impl.identity.Authentication.setAuthenticatedUserId(username);
    }
}

2.添加 DemoApplicationConfig 类

在 Activiti7 官方下载的 Example 中找到 DemoApplicationConfig 类，它的作用是为了实现 SpringSecurity 框架的用户权限的配置，这样我们就可以在系统中使用用户权限信息。本次项目中基本是在文件中定义出来的用户信息，当然也可以是数据库中查询的用户权限信息。

/*
 * Copyright 2018 Alfresco, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.itheima.activiti;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

@Configuration
@EnableWebSecurity
public class DemoApplicationConfiguration extends WebSecurityConfigurerAdapter {

    private Logger logger = LoggerFactory.getLogger(DemoApplicationConfiguration.class);

    @Override
    @Autowired
    public void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(myUserDetailsService());
    }

    @Bean
    public UserDetailsService myUserDetailsService() {

        InMemoryUserDetailsManager inMemoryUserDetailsManager = new InMemoryUserDetailsManager();

        String[][] usersGroupsAndRoles = {
                {"salaboy", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                {"ryandawsonuk", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                {"erdemedeiros", "password", "ROLE_ACTIVITI_USER", "GROUP_activitiTeam"},
                {"other", "password", "ROLE_ACTIVITI_USER", "GROUP_otherTeam"},
                {"admin", "password", "ROLE_ACTIVITI_ADMIN"},
        };

        for (String[] user : usersGroupsAndRoles) {
            List<String> authoritiesStrings = Arrays.asList(Arrays.copyOfRange(user, 2, user.length));
            logger.info("> Registering new user: " + user[0] + " with the following Authorities[" + authoritiesStrings + "]");
            inMemoryUserDetailsManager.createUser(new User(user[0], passwordEncoder().encode(user[1]),
                    authoritiesStrings.stream().map(s -> new SimpleGrantedAuthority(s)).collect(Collectors.toList())));
        }


        return inMemoryUserDetailsManager;
    }


    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .csrf().disable()
                .authorizeRequests()
                .anyRequest()
                .authenticated()
                .and()
                .httpBasic();


    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}

四.设置流程（构建bpmn文件）

五.使用 SpringBoot 整合 Junit 方式测试

package com.itheima.activiti;

import org.activiti.api.process.model.ProcessDefinition;
import org.activiti.api.process.model.ProcessInstance;
import org.activiti.api.process.model.builders.ProcessPayloadBuilder;
import org.activiti.api.process.runtime.ProcessRuntime;
import org.activiti.api.runtime.shared.query.Page;
import org.activiti.api.runtime.shared.query.Pageable;
import org.activiti.api.task.model.Task;
import org.activiti.api.task.model.builders.TaskPayloadBuilder;
import org.activiti.api.task.runtime.TaskRuntime;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

/**
 * @DESCRIPTION:
 * @USER: tangbingbing
 * @DATE: 2023/3/11 11:46
 */
@RunWith(SpringRunner.class)
@SpringBootTest
public class ActivitiTest {

    @Autowired
    private ProcessRuntime processRuntime; //流程定义相关

    @Autowired
    private TaskRuntime taskRuntime;  //任务操作相关

    @Autowired
    private SecurityUtil securityUtil; //springsecurity相关的工具类

    //流程定义信息查看
    @Test
    public void testDefinition(){
        securityUtil.logInAs("salaboy"); //需要先认证
        Page<ProcessDefinition> page = processRuntime.processDefinitions(Pageable.of(0, 10));
        System.out.println(page.getTotalItems());// 查看已部署的流程
        //page.getContent()查看当前每一个部署的信息
        for (ProcessDefinition processDefinition : page.getContent()) {
            System.out.println(processDefinition);
        }
    }

    //启动流程实例
    @Test
    public void testStartInstance(){
        securityUtil.logInAs("salaboy");
        ProcessInstance processInstance = processRuntime.start(ProcessPayloadBuilder
                .start()
                .withProcessDefinitionKey("myProcess_1")
                .build());
        System.out.println("流程实例id：" + processInstance.getId()); //流程实例id
    }

    //查询任务，并完成任务
    @Test
    public void testTask(){
        securityUtil.logInAs("ryandawsonuk");
        Page<Task> tasks = taskRuntime.tasks(Pageable.of(0, 10));
        if (tasks.getTotalItems() > 0) {
            for (Task task : tasks.getContent()) {
                System.out.println("任务1：" + task);
                //拾取任务
                taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
                //执行任务
                taskRuntime.complete(TaskPayloadBuilder.complete().withTaskId(task.getId()).build());
            }
        }
        //再次查看任务
        tasks = taskRuntime.tasks(Pageable.of(0, 10));
        if (tasks.getTotalItems() > 0) {
            for (Task task : tasks.getContent()) {
                System.out.println("任务2：" + task);
            }
        }

    }

    //查询任务，并完成任务
    @Test
    public void testTaskAll(){
        securityUtil.logInAs("erdemedeiros");
        Page<Task> tasks = taskRuntime.tasks(Pageable.of(0, 10));
        if (tasks.getTotalItems() > 0) {
            for (Task task : tasks.getContent()) {
                System.out.println("任务1：" + task);
                //拾取任务
                taskRuntime.claim(TaskPayloadBuilder.claim().withTaskId(task.getId()).build());
                //执行任务
                taskRuntime.complete(TaskPayloadBuilder.complete().withTaskId(task.getId()).build());
            }
        }
        //再次查看任务
        tasks = taskRuntime.tasks(Pageable.of(0, 10));
        if (tasks.getTotalItems() > 0) {
            for (Task task : tasks.getContent()) {
                System.out.println("任务2：" + task);
            }
        }

    }

}