SpringBoot整合Activiti7的實現

這期內容當中小編將會給大家帶來有關SpringBoot整合Activiti7的實現，文章內容豐富且以專業的角度為大家分析和敘述，閱讀完這篇文章希望大家可以有所收獲。

1.使用IDEA創建SpringBoot項目

在工程的pom.xml文件中引入相關的依賴，具體依賴如下所示

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.1.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
  </parent>
  <groupId>com.example</groupId>
  <artifactId>activiti</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <name>activiti</name>
  <description>Demo project for Spring Boot</description>

  <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>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>

    <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>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>
  </dependencies>

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

</project>

2.application.yml文件配置

為了能夠實現Activiti7生成的表放到Mysql數據庫中，需要在配置文件application.yml中添加相關的配置

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： 默認值。activiti在啟動時，會對比數據庫表中保存的版本，如果沒有表或者版本不匹配，將拋出異常
  #2.true： activiti會對數據庫中所有表進行更新操作。如果表不存在，則自動創建
  #3.create_drop： 在activiti啟動時創建表，在關閉時刪除表（必須手動關閉引擎，才能刪除表）
  #4.drop-create： 在activiti啟動時刪除原來的舊表，然后在創建新表（不需要手動關閉引擎）
  database-schema-update: true
  #檢測歷史表是否存在
  db-history-used: true
  #記錄歷史等級 可配置的歷史級別有none, activity, audit, full
  history-level: full
  #校驗流程文件，默認校驗resources下的processes文件夾里的流程文件
  check-process-definitions: false

3.添加SpringSecurity安全框架整合配置

Activiti7與SpringBoot整合后，默認情況下，集成了SpringSecurity安全框架，這樣我們就要去準備SpringSecurity整合進來的相關用戶權限配置信息

1）添加SecurityUtil類

為了能夠快速實現SpringSecurity安全框架的配置，所添加的一個組件。

@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);
  }
}

這個類可以從Activiti7官方提供的Example中找到。

2）添加DemoApplicationConfig類

它的作用是為了實現SpringSecurity框架的用戶權限的配置，這樣我們就可以在系統中使用用戶權限信息

@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<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;
  }


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

}

4）創建測試類

@SpringBootTest
@Slf4j
class ActivitiApplicationTests {

  @Autowired
  private ProcessEngine processEngine;

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

    Deployment deployment = repositoryService.createDeployment()
        .addClasspathResource("diagram/holiday.bpmn")//添加bpmn資源
        .addClasspathResource("diagram/holiday.png")
        .name("請假申請單流程")
        .deploy(); 
        
    log.info("流程部署id:" + deployment.getName());
    log.info("流程部署名稱:" + deployment.getId());
  }
}

運行結果：

遇到的問題：

1）歷史表默認不會生成，需在application.yml中配置

spring:
 activiti:
  #檢測歷史表是否存在
  db-history-used: true
  #記錄歷史等級 可配置的歷史級別有none, activity, audit, full
  history-level: full

上述就是小編為大家分享的SpringBoot整合Activiti7的實現了，如果剛好有類似的疑惑，不妨參照上述分析進行理解。如果想知道更多相關知識，歡迎關注億速云行業資訊頻道。