The activiti workflow connects to the database and installs the activiti plugin with eclipse

To create a maven project, the pom configuration of the required jar is as follows:

(Each dependency has a dependency copy address above)

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.xiaoyexinxixn</groupId>
  <artifactId>ActivityLesson</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>ActivityLesson</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
  <!-- https://mvnrepository.com/artifact/org.activiti/activiti-engine -->
  <!-- activity workflow engine-->
	<dependency>
	    <groupId>org.activiti</groupId>
	    <artifactId>activiti-engine</artifactId>
	    <version>5.17.0</version>
	</dependency>
	
	<!-- https://mvnrepository.com/artifact/org.activiti/activiti-spring -->
	<!-- The jar package of activiti-spring combined with spring-->
	<dependency>
	    <groupId>org.activiti</groupId>
	    <artifactId>activiti-spring</artifactId>
	    <version>5.17.0</version>
	</dependency>
	
	<!-- https://mvnrepository.com/artifact/org.activiti/activiti-bpmn-model -->
	<!-- bpmn model package-->
	<dependency>
	    <groupId>org.activiti</groupId>
	    <artifactId>activiti-bpmn-model</artifactId>
	    <version>5.17.0</version>
	</dependency>
	
	<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
	<!-- link database -->
	<dependency>
	    <groupId>mysql</groupId>
	    <artifactId>mysql-connector-java</artifactId>
	    <version>5.1.17</version>
	</dependency>
	
	
  
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

Let's write a test class that connects to the database, build the 24 tables needed by the activity, and first build a database:

Code:

package com.xiaoyexinxixn.ActivityLesson;

import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngineConfiguration;
import org.junit.Test;

public class ActivityConnectionDB {
	
	/*
	 * 25 tables of production database activity
	 */
	@Test
	public void CreateTabel(){
		//Get the process engine configuration
		ProcessEngineConfiguration pec=ProcessEngineConfiguration.createStandaloneProcessEngineConfiguration();
		//Load mysql driver
		pec.setJdbcDriver("com.mysql.jdbc.Driver");
		// link database
		pec.setJdbcUrl("jdbc:mysql://localhost:3306/db_activity");
		//Set the connection mysql user
		pec.setJdbcUsername("root");
		//Set the link mysql password
		pec.setJdbcPassword("123456");
		//Set the automatic creation table and update table
		pec.setDatabaseSchemaUpdate(ProcessEngineConfiguration.DB_SCHEMA_UPDATE_TRUE);
		
		//Build the process engine, that is, get the process engine object
		ProcessEngine pe=pec.buildProcessEngine();
		
	}

}

As can be seen from the code, the activity engine will automatically build 24 tables.

24 tables produced in the database:

The function of each table will not be introduced, readers can Baidu;

Next, we change the way of linking the database to the configuration file format. The content of xml can be copied on the activiti official website, the address:

https://www.activiti.org/userguide/index.html#_configuration

Let's create an activiti.cfg.xml file in the following figure, and the file name must be strictly defined as this name:

Here we do the simplest configuration first:

<?xml version="1.0" encoding="UTF-8"?>
 
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans   http://www.springframework.org/schema/beans/spring-beans.xsd">
 
<bean id="processEngineConfiguration" class="org.activiti.engine.impl.cfg.StandaloneProcessEngineConfiguration">
 
    <!-- Database configurations -->
    <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/db_activity" />
    <property name="jdbcDriver" value="com.mysql.jdbc.Driver" />
    <property name="jdbcUsername" value="root" />
    <property name="jdbcPassword" value="123456" />
    <property name="databaseSchemaUpdate" value="true" />
   
  </bean>
 
</beans>

Test code:

/*
	 * Get the process engine object through the configuration file
	 */
	@Test
	public void createTableWithXML(){
		//engine configuration
		ProcessEngineConfiguration pec=ProcessEngineConfiguration.createProcessEngineConfigurationFromResource("activiti.cfg.xml");
		//Get the process engine object
		pec.buildProcessEngine();
	}
	

Here we first delete the previously built table, and then run the above test code;

Next, we want to download the plug-in for drawing activity workflow diagram on eclipse

help-->Install help software

Click the add button and enter:

name: Activiti BPMN 2.0 designer

location:  http://activiti.org/designer/update/