【Activiti学习之二】Activiti API

环境
　　JDK 1.8
　　MySQL 5.6
　　Tomcat 7
　　Eclipse-Luna
　　activiti 6.0

一、Activiti数据查询
准备数据：

package com.wjy.act;

import org.activiti.engine.IdentityService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.identity.Group;

public class SaveGroup {

    public static void main(String[] args) {
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        IdentityService is = engine.getIdentityService();
        for(int i = 0; i < 10; i++) {
            Group group = is.newGroup(String.valueOf(i));
            group.setName("Group_" + i);
            group.setType("TYPE_" + i);
            is.saveGroup(group);//保存到表act_id_group
        }
        engine.close();
        System.exit(0);
        
    }

}

list 查询多条和count 数量统计：

package com.wjy.act;

import java.util.List;

import org.activiti.engine.IdentityService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.identity.Group;

public class TestList {

    public static void main(String[] args) {
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        IdentityService is = engine.getIdentityService();
        
        //测试list查询
        List<Group> groups = is.createGroupQuery().list();
        for(Group g : groups) {
            System.out.println(g.getId() + "---" + g.getName() + "---" + g.getType());
        }
        //测试 count
        long size = is.createGroupQuery().count();
        System.out.println(size);
    }

}

listPage 分页查询：

package com.wjy.act;

import java.util.List;

import org.activiti.engine.IdentityService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.identity.Group;

public class TestListPage {

    public static void main(String[] args) {
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        IdentityService is = engine.getIdentityService();
        
        //分页查询 listPage
        List<Group> groups = is.createGroupQuery().listPage(1, 5);
        for(Group g : groups) {
            System.out.println(g.getId() + "---" + g.getName() + "---" + g.getType());
        }
    }

}

singleResult 查询单条

package com.wjy.act;

import org.activiti.engine.IdentityService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.identity.Group;

public class TestSingle {

    public static void main(String[] args) {
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        IdentityService is = engine.getIdentityService();
        //测试singleResult
        Group g = is.createGroupQuery().groupName("Group_0").singleResult();
        System.out.println(g.getId());
    }

}

asc 升序和desc 降序:

package com.wjy.act;

import java.util.List;

import org.activiti.engine.IdentityService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.identity.Group;

public class TestSort {

    public static void main(String[] args) {
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        IdentityService is = engine.getIdentityService();
        //测试降序 升序  需要根据字段orderby  
        //多字段排序 orderby之后都要跟上asc() 或desc()
        //is.createGroupQuery().orderByGroupId().asc().orderByGroupName().asc().list();
        List<Group> groups = is.createGroupQuery().orderByGroupId().desc().orderByGroupName().asc().list();
        for(Group g : groups) {
            System.out.println(g.getId());
        }
    }

}

按照字段条件查询：

package com.wjy.act;

import java.util.List;

import org.activiti.engine.IdentityService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.identity.Group;

public class FieldQuery {

    public static void main(String[] args) {
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        IdentityService is = engine.getIdentityService();
        //按照字段条件查询
        List<Group> groups = is.createGroupQuery().groupName("Group_1").groupType("TYPE_1").list();
        for(Group g : groups) {
            System.out.println(g.getId());
        }
    }

}

支持原生sql查询：

package com.wjy.act;

import java.util.List;

import org.activiti.engine.IdentityService;
import org.activiti.engine.ProcessEngine;
import org.activiti.engine.ProcessEngines;
import org.activiti.engine.identity.Group;

public class NativeQuery {

    public static void main(String[] args) {
        ProcessEngine engine = ProcessEngines.getDefaultProcessEngine();
        IdentityService is = engine.getIdentityService();

        //支持原生sql语句查询
        List<Group> groups = is.createNativeGroupQuery()
                .sql("SELECT * FROM ACT_ID_GROUP where NAME_ = #{name}")
                .parameter("name", "Group_2").list();
        for (Group g : groups) {
            System.out.println(g.getId());
        }
    }

}