流程定义查询，act_re_procdef

        流程定义查询的Service与流程部署的Service一样，是RepositoryService接口实现。

        核心知识点如下：

        

        //开启流程之前先寻找最新版本的请假流程定义
        ProcessDefinitionQuery query = repositoryService.createProcessDefinitionQuery();
        //添加查询条件，KEY
        query.processDefinitionKey("myProcess_1");
        //最新版本过滤
        query.latestVersion();
        //查询
        ProcessDefinition definition = query.singleResult();
        //获取流程定义id
        String processDefId = definition.getId();
        //通过指定流程定义的id，开启流程定义，得到流程实例。流程实例是一系列任务的集合
        ProcessInstance processInstance = runtimeService.startProcessInstanceById(processDefId);

        

        

    @RequestMapping(value = {URL_DEPLOY_PROCESS_DEF_LIST})
    @ResponseBody
    public PagedQueryExtResult<ProcessDefEntity> processDefListForExtJs(ProcessDefQueryCondition condition) {
        LOGGER.info("obtain Process Def for ExtJs,condition={}",condition);
        ProcessDefinitionQuery query = repositoryService.createProcessDefinitionQuery();//重点！！！！！！！！
        //总条数
        long size = query.count();
        //分页查询
        query.listPage(condition.getStart(),condition.getLimit());
        //根据KEY查询
        query.processDefinitionKey("myProcess_1");
        List<ProcessDefinition> list = query.list();
        //创建我们自己的list,用于前后端交互
        List<ProcessDefEntity> myList = new ArrayList<>();
        //将查询出来的流程定义中的数据，加载到我们自己的list中
        for(ProcessDefinition def : list){
            ProcessDefEntity entity = new ProcessDefEntity();
            entity.setId(def.getId());
            entity.setName(def.getName());
            entity.setKey(def.getKey());
            entity.setDeploymentId(def.getDeploymentId());
            entity.setResourceName(def.getResourceName());
            entity.setVersion(def.getVersion());
            myList.add(entity);
        }
        //创建分页查询结果实体
        PagedQueryExtResult<ProcessDefEntity> result = new PagedQueryExtResult<>();
        //设置本次分页查询结果
        result.setResults(myList);
        //设置总数
        result.setTotal((int)size);
        //设置本次响应成功
        result.setSuccess(true);
        return result;
    }

        本方法的参数，是ProcessDefQueryCondition，用于封装Ext的面板的查询参数，有三个查询条件，很简单

        

package com.ssi.domains.workflow.queryCondition;

import com.ssi.web.AbstractPaginationExtQueryCondition;

/**
 * Created by jay.zhou on 2018/6/25.
 */
public class ProcessDefQueryCondition extends AbstractPaginationExtQueryCondition {

}

package com.ssi.web;

import lombok.Getter;
import lombok.Setter;

/**
 * Created by jay.zhou on 2018/6/25.
 */
@Getter
@Setter
public abstract class AbstractPaginationExtQueryCondition {
    private int page;

    private int start;

    private int limit;

}

返回的结果基本与数据库中 act_re_procdef 字段保持一致。返回结果实体对象

   

package com.ssi.domains.workflow.entity;

import lombok.Getter;
import lombok.Setter;

/**
 * Created by jay.zhou on 2018/6/25.
 */
@Getter
@Setter
public class ProcessDefEntity {
    private String id;

    private String name;

    private String key;

    private int version;

    private String resourceName;

    private String deploymentId;
}

        另外，方法的返回值根据当前前端框架进行编写相关Java代码。本小节重点是，通过工作流的RepositoryService接口实现，根据相关条件，比如分页查询、根据流程定义表的KEY字段进行查询。