activiti实战系列之动态表单 formService 自定义变量类型

目前Activiti默认支持的类型有String,long,enum,date,boolean,collection

要自定义字段类型，首先需要表单类型解析类

/**
 * @Author：LJ
 * @Description： activiti Javascript类型表单字段
 * @Date: 2018/5/17
 * @Modified By:
 */
public class JavascriptFormType extends AbstractFormType {
    /**
     * 把表单中的值转换为实际的对象
     * @param propertyValue
     * @return
     */
    @Override
    public Object convertFormValueToModelValue(String propertyValue) {
        return propertyValue;
    }

    /**
     * 把实际对象的值转换为表单中的值
     * @param modelValue
     * @return
     */
    @Override
    public String convertModelValueToFormValue(Object modelValue) {
        return (String) modelValue;
    }

    /**
     * 定义表单类型的标识符
     *
     * @return
     */
    @Override
    public String getName() {
        return "javascript";
    }
}

第二、在流程引擎中注册解析类

<?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">
....
        <!-- 自定义表单字段类型 -->
        <property name="customFormTypes">
            <list>
                <bean class="me.kafeitu.activiti.form.JavascriptFormType" />
            </list>
        </property>
    </bean>
</beans>

 扩展：SpringBoot方式注册解析

package com.example.demo.config;

import com.example.demo.config.formType.JavascriptFormType;
import org.activiti.engine.form.AbstractFormType;
import org.activiti.spring.SpringProcessEngineConfiguration;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import java.util.Arrays;
import java.util.List;

/**
 * @Author：LJ
 * @Description：
 * @Date: 2018/3/21
 * @Modified By:
 */
@Configuration
public class ApplicationConfig extends WebMvcConfigurerAdapter {/**
     * 方式一
     *@Author LJ
    */
    @Bean
    public BeanPostProcessor activitiConfigurer() {
        return new BeanPostProcessor() {
            @Override
            public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
                if (bean instanceof SpringProcessEngineConfiguration) {
                    List<AbstractFormType> customFormTypes = Arrays.<AbstractFormType>asList(new JavascriptFormType());
                    ((SpringProcessEngineConfiguration)bean).setCustomFormTypes(customFormTypes);
                }
                return bean;
            }
            @Override
            public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
                return bean;
            }
        };

    }
}

参考：

How to declare an Activiti custom FormType in a Spring Boot application