Activiti图片乱码（高亮）-优快云博客

本文链接：https://blog.youkuaiyun.com/iteye_14207/article/details/82650297

本文详细介绍了在Spring环境中配置Activiti引擎的过程，并通过示例展示了如何利用配置的引擎生成流程图，包括数据库类型、数据源、事务管理、历史记录、活动和标签字体等关键属性的设置。

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[img]http://dl2.iteye.com/upload/attachment/0116/5687/5baeb5e2-0f0a-31e1-85e4-dc2da3493863.png[/img]

在spring中设置ProcessEngineConfiguration中的属性


<bean id="processEngineConfiguration" class="org.activiti.spring.SpringProcessEngineConfiguration">
	    <property name="databaseType" value="postgres" />
	    <property name="dataSource" ref="dataSource" />
	    <property name="transactionManager" ref="transactionManager" />
	    <property name="databaseSchemaUpdate" value="true" />
	    <property name="jobExecutorActivate" value="true" />
	    <property name="history" value="full" />
	     <!-- 生成流程图的字体 -->
        <property name="activityFontName" value="宋体"/>
        <property name="labelFontName" value="宋体"/>
		<property name="customSessionFactories">
		    <list>
      			<bean class="com.searchingsoft.platform.activiti.ActivitiUserManagerFactory" />
      			<bean class="com.searchingsoft.platform.activiti.ActivitiGroupManagerFactory" />
		    </list>
		</property>
	</bean>

在调用的方法（拷贝咖啡兔的方法）如下：


@RequestMapping("/~{custId}/workflow/trace/auto**")
    public void readResource(@RequestParam("executionId") String executionId, HttpServletResponse response)
            throws Exception {
        ProcessInstance processInstance = runtimeService.createProcessInstanceQuery().processInstanceId(executionId).singleResult();
        BpmnModel bpmnModel = repositoryService.getBpmnModel(processInstance.getProcessDefinitionId());
        List<String> activeActivityIds = runtimeService.getActiveActivityIds(executionId);
        // 不使用spring请使用下面的两行代码
//    ProcessEngineImpl defaultProcessEngine = (ProcessEngineImpl) ProcessEngines.getDefaultProcessEngine();
//    Context.setProcessEngineConfiguration(defaultProcessEngine.getProcessEngineConfiguration());

        // 使用spring注入引擎请使用下面的这行代码
        processEngineConfiguration = processEngine.getProcessEngineConfiguration();
        Context.setProcessEngineConfiguration((ProcessEngineConfigurationImpl) processEngineConfiguration);

//        ProcessDiagramGenerator diagramGenerator = processEngineConfiguration.getProcessDiagramGenerator();
//        InputStream imageStream = diagramGenerator.generateDiagram(bpmnModel, "png", activeActivityIds);
        InputStream imageStream = processEngine.getProcessEngineConfiguration().getProcessDiagramGenerator()
        .generateDiagram(bpmnModel, "png", activeActivityIds, Collections.<String>emptyList(),
                         processEngine.getProcessEngineConfiguration().getActivityFontName(),
                         processEngine.getProcessEngineConfiguration().getLabelFontName(), 
                         processEngine.getProcessEngineConfiguration().getClassLoader(),1.0);



        // 输出资源内容到相应对象
        byte[] b = new byte[1024];
        int len;
        while ((len = imageStream.read(b, 0, 1024)) != -1) {
            response.getOutputStream().write(b, 0, len);
        }
    }

[img]http://dl2.iteye.com/upload/attachment/0116/5685/60159210-b442-33d9-b628-db8330d07db8.png[/img]

启发于
[url]http://www.mossle.com/ask/question.do?id=4[/url]
[url]http://my.oschina.net/u/1241965/blog/294917[/url]
我去看了diagramGenerator.generateDiagram有哪些参数