String isSubmit=request.getParameter("isSubmit");
    if(null!=isSubmit&"true".equals(isSubmit)){
        String title=request.getParameter("title");
        String money_count=request.getParameter("money_count");
        String remark=request.getParameter("remark");
        String issueperson=request.getSession().getAttribute("loginuser").toString();
        JbpmContext jbpmContext=JbpmConfiguration.getInstance().createJbpmContext();
        try{
            //设置当前的登录用户为issueperson
            jbpmContext.setActorId(issueperson);
            ProcessDefinition pd=jbpmContext.getGraphSession().findLatestProcessDefinition("payment");
            //每次都新建一个实例
            ProcessInstance pi=new ProcessInstance();
            pi=pd.createProcessInstance();
            out.println("<script> alert("+pi.getId()+")</script>");
            ContextInstance ci=pi.getContextInstance();
            ci.setVariable("issueperson",issueperson);
            //创建任务开始节点的TaskInstance
            TaskInstance ti=pi.getTaskMgmtInstance().createStartTaskInstance();
            //向任务实例当中写入相关变量
            ti.setVariable("title",title);
            ti.setVariable("money_count",money_count);
            ti.setVariable("remark",remark);
            //结束任务实例，流程的Token就进入部门经理审批节点
            ti.end();
            
        }finally{
            jbpmContext.close();
        }
        out.println("<h1>报销申请提交成功</h1>");
        return;
    }

<form action="wirte.jsp" method="post">
      报销主题:<input type="text" name="title"/><br/>
      报销金额:<input type="text" name="money_count" /><br>
      报销说明:<input type="text" name="remark"/><br/>
      <input type="hidden" name="isSubmit" value="true"/>
      <input type="submit" value="提交报销"/>
  </form>

public class ManagerAssignment implements AssignmentHandler,Constants {

    @Override
    public void assign(Assignable assignable, ExecutionContext executionContext) throws SqlOperationException {
        //从当前流程实例上下文当中取出当前报销人
        String issueperson=executionContext.getContextInstance().getVariable(this.ISSUE_PERSON).toString();
        if(issueperson.equals("user1")){
            //当报销人为user1时，部门经理为manager1
            assignable.setActorId("manager1");
        }else{
            //当报销人为其他人时，部门经理为manager2
            assignable.setActorId("manager2");
        }
    }

}