JBPM4.2小例子(swing实现)

本次用的是一个特别流程,假设C提交一个表单,这个表单需要给A和B阅读,而A和B阅读过后,流程结束.
流程定义文件swing.jpdl.xml

<?xml version="1.0" encoding="UTF-8"?>

<process name="swing" xmlns="http://jbpm.org/4.0/jpdl">
   <start g="94,64,48,48" name="start1">
      <transition g="-52,-22" name="A" to="A"/>
   </start>
   <task assignee="A" g="73,195,92,52" name="A">
      <transition g="-52,-22" name="B" to="B"/>
   </task>
   <task assignee="B" g="266,192,92,52" name="B">
      <transition g="-40,-21" name="end" to="end1"/>
   </task>
   <end g="290,327,48,48" name="end1"/>
</process>

增加两个表:
用户表p_user:
USER_      用户登录ID
PASSWORD_  用户登录密码

表单数据表p_form:
ID_             表单编号
TITLE_          表单标题
CONTENT_        表单内容
PROCESS_ID      流程实例ID
p_form除了记录表单数据,还记录启动流程实例的ID,这个表负责把表单和流程关联起来.


提交表单时的操作,FormPanel.java部分代码:

okBtn = new JButton("提交表单");
okBtn.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
 String t = title.getText().trim();
 String c = content.getText().trim();
 String processId = startProcessInstance();
    
 DataBase db = new DataBase();
 if(db.saveForm(t, c, processId)){
  JOptionPane.showMessageDialog(null, "保存表单数据成功:");
  title.setText("");
  content.setText("");
 }
}
});



private String startProcessInstance(){
 Configuration configuration = new Configuration();
 ProcessEngine processEngine = configuration.buildProcessEngine();
 RepositoryService repositoryService = processEngine.getRepositoryService();
 ExecutionService executionService = processEngine.getExecutionService();
 ProcessInstance processInstance = executionService.startProcessInstanceByKey("swing");
 if(processInstance == null){
     JOptionPane.showMessageDialog(null, "请先发布流程.");
 }
 else{
     return processInstance.getId();
 }
 return "";
}

代码很简单,行获取表单的数据,再启动流程实例,并把表单数据和流程实例ID一起保存在数据库表p_form.


在用户处理任务时,先根据用户的ID查找到该用户的待处理任务,并把它添加到任务列表中,

DefaultListModel v = new DefaultListModel();
List list = getTaskList(Login.userName);
if(list.size() > 0){
 for(int s = 0; s < list.size(); s++){
  Task t = (Task)list.get(s);
  String executionId = t.getExecutionId();
  DataBase db = new DataBase();
  TaskPojo tp = db.findForm(executionId);
  tp.setTaskId(t.getId());
  if(tp != null){
   v.addElement(tp);
  }
 }
}
jList = new JList(v);
.
 private List getTaskList(String userId){
  if(configuration == null){
   configuration = new Configuration();
  }
     ProcessEngine processEngine = configuration.buildProcessEngine();
     RepositoryService repositoryService = processEngine.getRepositoryService();
     ExecutionService executionService = processEngine.getExecutionService();
     TaskService taskService = processEngine.getTaskService();
     HistoryService historyService = processEngine.getHistoryService();
     ManagementService managementService = processEngine.getManagementService();
     List<Task> taskList = taskService.findPersonalTasks(userId);
     return taskList;
 }

用户处理任务,根据列表中选中记录中的流程实例任务ID,调用

taskService.completeTask(taskId)完成任务,
okBtn = new JButton("审阅通过");
okBtn.addActionListener( new ActionListener(){
 public void actionPerformed(ActionEvent e){
  Object o = jList.getSelectedValue();
  if(o instanceof TaskPojo){
   TaskPojo tp = (TaskPojo)o;
   completeTask(tp.getTaskId());
   JOptionPane.showMessageDialog(null, "审核已经通过!");
   DefaultListModel dl = (DefaultListModel)jList.getModel();
   dl.remove(jList.getSelectedIndex());
   buttomPanel.setVisible(false);
  }
 }
});
..
private void completeTask(String taskId){
 if(configuration == null){
  configuration = new Configuration();
 }
 ProcessEngine processEngine = configuration.buildProcessEngine();
 TaskService taskService = processEngine.getTaskService();
 taskService.completeTask(taskId);
}

数据库中登录用户:
帐号:A  密码:123
帐号:B  密码:123
帐号:D  密码:123

用户D登录