JBPM4-显示流程图

1、发布流程：流程定义文件+流程图，打成zip包一起发布

ProcessEngine processEngine=Configuration.getProcessEngine(); 
RepositoryService repositoryService = processEngine.getRepositoryService();
ZipInputStream zis=new ZipInputStream(this.getClass().getResourceAsStream("/leave.zip"));

repositoryService.createDeployment().addResourcesFromZipInputStream(zis).deploy();

2、从流程实例中获取流程图生成显示（pic.jsp）

<%@ page import="org.jbpm.api.*,java.io.*" %>
<%
ProcessEngine processEngine=Configuration.getProcessEngine(); 
RepositoryService repositoryService = processEngine.getRepositoryService();
ExecutionService executionService=processEngine.getExecutionService();

String id=request.getParameter("id");

ProcessInstance processInstance=executionService.findProcessInstanceById(id);
String processDefinitionId=processInstance.getProcessDefinitionId();

ProcessDefinition processDefinition=repositoryService.createProcessDefinitionQuery().processDefinitionId(processDefinitionId).uniqueResult();
InputStream inputStream=repositoryService.getResourceAsStream(processDefinition.getDeploymentId(), "leave.png");
byte[] b=new byte[1024];
int len=-1;
while((len=inputStream.read(b,0,1024)) != -1)
{
        response.getOutputStream().write(b, 0, len);
}
%>

3、显示流程图，当前活动环节用绿色方框框住，如最上面的图所示

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ page import="java.util.*,org.jbpm.api.*,org.jbpm.api.task.*,org.jbpm.api.model.*" %>
<%
    String id=request.getParameter("id");
ProcessEngine processEngine=Configuration.getProcessEngine(); 
RepositoryService repositoryService = processEngine.getRepositoryService();
ExecutionService executionService=processEngine.getExecutionService();
ProcessInstance processInstance=executionService.findProcessInstanceById(id);
Set<String> activityName=processInstance.findActiveActivityNames();
ActivityCoordinates ac=repositoryService.getActivityCoordinates(processInstance.getProcessDefinitionId(), activityName.iterator().next());
%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>查看流程图</title>
</head>
<body style="background-color:red;">
<img src="pic.jsp?id=<%=id %>" style="position:absolute;left:0px;top:0px;"/>
<div style="z-index:2;position:absolute;border:1px solid green;left:<%=ac.getX() %>px;top:<%=ac.getY() %>px;width:<%=ac.getWidth() %>px;height:<%=ac.getHeight() %>px;"></div>
</body>
</html>

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JBPM4-显示流程图

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