如何在JBPM中设置正文表单数据请求

Question

我想在JBPM中设置正文表单数据请求。我正在尝试来自邮递员的请求，并且它能正常工作...我已经使用Java完成了一个简单的示例，现在我需要在诸如邮递员这样的正文中发送文件。

如何为内容文件设置正文和键“文件”？

import java.util.Map;
import org.drools.core.process.instance.impl.WorkItemImpl;
import org.jbpm.process.workitem.rest.RESTWorkItemHandler;
import org.kie.api.runtime.process.WorkItem;
import org.kie.api.runtime.process.WorkItemHandler;
import org.kie.api.runtime.process.WorkItemManager;

public class test {

    public static void main(String[] args) {
        test t=new test();
        System.out.println(t.uploadFile("xxx","xxx","xxx","xxx","filebase64"));
    }

    public String uploadFile(String user, String pwd, String site, String path, String file) {
    String result = "Error uploadFile ";
    try {           
        String Headers = "user=" + user + ";pwd=" + pwd + ";site=" + site; // Sending headers
        RESTWorkItemHandler handler = new RESTWorkItemHandler();
        WorkItemImpl workItem = new WorkItemImpl();
        workItem.setParameter("Url",
                "https://mywebsite.com/sharing/api/v1/files?path=" + path); //Sending parameters
        workItem.setParameter("Method", "POST");
        workItem.setParameter("ContentType", "application/json");
        workItem.setParameter(RESTWorkItemHandler.PARAM_HEADERS, Headers);
        workItem.setParameter("Body", file); // How send body ? base64?
        InterfaceTestWorkItemManager manager = new InterfaceTestWorkItemManager(workItem);
        handler.executeWorkItem(workItem, manager);
        int responseCode = (Integer) workItem.getResult("Status");
        if (responseCode == 200) {
            result = (String) workItem.getResult("Result");
        } else {
            result += "responseCode " + responseCode;
        }
    } catch (Exception e) {
        result += e.getMessage();
    }
    return result;
}

class InterfaceTestWorkItemManager implements WorkItemManager {    
    private WorkItem workItem;

    TestWorkItemManager(WorkItem workItem) {
        this.workItem = workItem;
    }

    @Override
    public void completeWorkItem(long id, Map<String, Object> results) {
        ((WorkItemImpl)workItem).setResults(results);        
    }

    @Override
    public void abortWorkItem(long id) {}

    @Override
    public void registerWorkItemHandler(String workItemName, WorkItemHandler handler) {}

}

可以原始发送吗？