SpringBoot整合Activiti7的实现代码

Activiti7发布正式版之后，它与SpringBoot2.x已经完全支持整合开发。我们可以将Activiti7与SpringBoot整合开发的坐标引入到工程中，从而达到SpringBoot支持Activti7整合。

1.使用IDEA创建SpringBoot项目

在工程的pom.xml文件中引入相关的依赖，具体依赖如下所示

<?xml version="1.0" encoding="UTF-8"?>

  4.0.0
  
    org.springframework.boot
    spring-boot-starter-parent
    2.2.1.RELEASE
     
  
  com.example
  activiti
  0.0.1-SNAPSHOT
  activiti
  Demo project for Spring Boot

  
    UTF-8
    UTF-8
    1.8
  

  
    
      org.springframework.boot
      spring-boot-starter-jdbc
    

    
      org.springframework.boot
      spring-boot-starter-web
    

    
      org.springframework.boot
      spring-boot-starter-test
      test
    

    
      org.activiti
      activiti-spring-boot-starter
      7.0.0.Beta2
    
    
      org.mybatis
      mybatis
      3.4.5
    
    
      mysql
      mysql-connector-java
      5.1.27
    
    
      org.projectlombok
      lombok
      true
    
  

  
    
      
        org.springframework.boot
        spring-boot-maven-plugin
      
    
  

2.application.yml文件配置

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

server:
 port: 8085
spring:
 application:
  name: spring-activiti
 datasource:
  url: jdbc:mysql://localhost:3306/activiti?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT&nullCatalogMeansCurrent=true
  username: root
  password: 123456
  driver-class-name: com.mysql.jdbc.Driver
 activiti:
  #1.flase： 默认值。activiti在启动时，会对比数据库表中保存的版本，如果没有表或者版本不匹配，将抛出异常
  #2.true： activiti会对数据库中所有表进行更新操作。如果表不存在，则自动创建
  #3.create_drop： 在activiti启动时创建表，在关闭时删除表（必须手动关闭引擎，才能删除表）
  #4.drop-create： 在activiti启动时删除原来的旧表，然后在创建新表（不需要手动关闭引擎）
  database-schema-update: true
  #检测历史表是否存在
  db-history-used: true
  #记录历史等级 可配置的历史级别有none, activity, audit, full
  history-level: full
  #校验流程文件，默认校验resources下的processes文件夹里的流程文件
  check-process-definitions: false

3.添加SpringSecurity安全框架整合配置

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类

为了能够快速实现SpringSecurity安全框架的配置，所添加的一个组件。

@Component
public class SecurityUtil {

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

  @Autowired
  @Qualifier("myUserDetailsService")
  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");
    }
    logger.info("> Logged in as: " + username);
    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);
  }
}

这个类可以从Activiti7官方提供的Example中找到。

2）添加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

@Configuration
public class DemoApplicationConfiguration {

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

  @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"},
        {"system", "password", "ROLE_ACTIVITI_USER"},
        {"admin", "password", "ROLE_ACTIVITI_ADMIN"},
    };

    for (String[] user : usersGroupsAndRoles) {
      List 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;
  }


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

}

4）创建测试类

@SpringBootTest
@Slf4j
class ActivitiApplicationTests {

  @Autowired
  private ProcessEngine processEngine;

  /**
   * 流程定义的部署
   */
  @Test
  public void createDeploy() { 
    RepositoryService repositoryService = processEngine.getRepositoryService();

    Deployment deployment = repositoryService.createDeployment()
        .addClasspathResource("diagram/holiday.bpmn")//添加bpmn资源
        .addClasspathResource("diagram/holiday.png")
        .name("请假申请单流程")
        .deploy(); 
        
    log.info("流程部署id:" + deployment.getName());
    log.info("流程部署名称:" + deployment.getId());
  }
}

运行结果：

遇到的问题：

1）历史表默认不会生成，需在application.yml中配置

spring:
 activiti:
  #检测历史表是否存在
  db-history-used: true
  #记录历史等级 可配置的历史级别有none, activity, audit, full
  history-level: full

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持潘少俊衡。