工作流引擎例子（连库Oracle）

import java.io.IOException; import java.util.ArrayList; import java.util.Collections; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import com.opensymphony.workflow.Workflow; import com.opensymphony.workflow.basic.BasicWorkflow; import com.opensymphony.workflow.loader.WorkflowDescriptor; public class Test extends HttpServlet{ @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { try{ HttpSession session = req.getSession(); Workflow wf = new BasicWorkflow((String) session.getAttribute("username")); long id = Long.parseLong(req.getParameter("id")); String doString = req.getParameter("do"); if (doString != null && !doString.equals("")) { int action = Integer.parseInt(doString); wf.doAction(id, action, Collections.EMPTY_MAP); // } int[] actions = wf.getAvailableActions(id, null); // WorkflowDescriptor wd = wf.getWorkflowDescriptor(wf.getWorkflowName(id)); List perms = wf.getSecurityPermissions(id, null); // req.setAttribute("actions", actions); req.setAttribute("wd", wd); req.setAttribute("id", id); req.setAttribute("list", perms); ArrayList steps = new ArrayList(); steps.addAll(wf.getCurrentSteps(id)); steps.addAll(wf.getHistorySteps(id)); req.setAttribute("steps", steps); req.getRequestDispatcher("test.jsp").forward(req, resp); }catch (Exception e) { e.printStackTrace(); } } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this.doGet(req, resp); } }