1.通过上一节的操作，可以知道流程启动以后会同时生成一个流程实例和用户任务，这个用户任务保存在act_ru_task和act_hi_task表中，从表明可以看出ru是runtime，hi是history。但是需要注意的是，和操作流程使用的service不同，操作正在发生任务不是使用runtimeService，而是专门的taskService。
2.后台业务代码，
（1）自定义的任务实体类
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package model;
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import java.util.Date;
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public class TaskModel {
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private String id;
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private String name;
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private String processInstanceId;
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private String assignee;
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private Date createTime;
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private String nextPerson;
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private String cause;
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private String content;
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private String taskType;
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private String processKey;
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private String processDefId;
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public String getTaskType() {
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return taskType;
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}
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public void setTaskType(String taskType) {
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this.taskType = taskType;
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}
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public String getId() {
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return id;
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}
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public void setId(String id) {
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this.id = id;
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}
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public String getName() {
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return name;
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}
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public void setName(String name) {
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this.name = name;
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}
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public String getProcessInstanceId() {
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return processInstanceId;
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}
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public void setProcessInstanceId(String processInstanceId) {
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this.processInstanceId = processInstanceId;
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}
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public String getAssignee() {
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return assignee;
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}
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public void setAssignee(String assignee) {
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this.assignee = assignee;
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}
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public Date getCreateTime() {
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return createTime;
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}
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public void setCreateTime(Date createTime) {
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this.createTime = createTime;
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}
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public String getNextPerson() {
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return nextPerson;
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}
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public void setNextPerson(String nextPerson) {
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this.nextPerson = nextPerson;
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}
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public String getCause() {
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return cause;
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}
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public void setCause(String cause) {
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this.cause = cause;
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}
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public String getContent() {
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return content;
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}
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public void setContent(String content) {
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this.content = content;
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}
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public String getProcessKey() {
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return processKey;
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}
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public void setProcessKey(String processKey) {
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this.processKey = processKey;
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}
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public String getProcessDefId() {
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return processDefId;
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}
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public void setProcessDefId(String processDefId) {
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this.processDefId = processDefId;
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}
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@Override
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public String toString() {
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return "TaskModel [id=" + id + ", name=" + name
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+ ", processInstanceId=" + processInstanceId + ", assignee="
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+ assignee + ", createTime=" + createTime + ", nextPerson="
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+ nextPerson + ", cause=" + cause + ", content=" + content
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+ ", taskType=" + taskType + ", processKey=" + processKey
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+ ", processDefId=" + processDefId + "]";
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}
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}
（2）业务逻辑：查询任务使用taskService调用相关的方法来完成，可以根据特定的条件，也可以不加条件查询所有。可以返回task为元素的list，也可以返回单独的task对象，但是需要注意的是，如果要返回单独的task对象，则必须确定返回值是唯一的对象，否则就会抛出异常。下边的例子中，我是根据当前登陆的用户名来查询出对应的所有task：
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@RequestMapping(value = "/findTask.do", method = RequestMethod.POST, produces = "application/json;charset=utf-8")
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@ResponseBody
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public Object findTask(HttpServletRequest req) throws XMLStreamException {
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Map<String, Object> map = new HashMap<String, Object>();
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boolean isLogin = this.isLogin(req);
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if (isLogin) {
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List<TaskModel> taskList = new ArrayList<TaskModel>();
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HttpSession session = req.getSession();
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String assginee = (String) session.getAttribute("userName");
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List<Task> taskList1 = taskService.createTaskQuery()
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.taskAssignee(assginee).list();
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if (taskList1 != null && taskList1.size() > 0) {
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for (Task task : taskList1) {
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TaskModel taskModel = new TaskModel();
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taskModel.setAssignee(task.getAssignee());
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taskModel.setCreateTime(task.getCreateTime());
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taskModel.setId(task.getId());
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taskModel.setName(task.getName());
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taskModel.setProcessInstanceId(task.getProcessInstanceId());
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taskModel.setProcessDefId(task.getProcessDefinitionId());
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Map<String, Object> variables = runtimeService
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.getVariables(task.getProcessInstanceId());
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Set<String> keysSet = variables.keySet();
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Iterator<String> keySet = keysSet.iterator();
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while (keySet.hasNext()) {
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String key = keySet.next();
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if (key.endsWith("cause")) {
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taskModel.setCause((String) variables.get("cause"));
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} else if (key.endsWith("content")) {
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taskModel.setContent((String) variables
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.get("content"));
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} else if (key.endsWith("taskType")) {
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taskModel.setTaskType((String) variables
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.get("taskType"));
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} else if (!assginee.equals(variables.get(key))) {
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Iterator<FlowElement> iterator = this.findFlow(task
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.getProcessDefinitionId());
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while (iterator.hasNext()) {
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FlowElement flowElement = iterator.next();
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String classNames = flowElement.getClass()
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.getSimpleName();
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if (classNames.equals("UserTask")) {
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UserTask userTask = (UserTask) flowElement;
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String assginee11 = userTask.getAssignee();
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String assginee12 = assginee11.substring(
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assginee11.indexOf("{") + 1,
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assginee11.indexOf("}"));
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String assignee13 = (String) variables
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.get(assginee12);
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if (assginee.equals(assignee13)) {
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iterator.next();
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FlowElement flowElement2 = iterator
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.next();
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String classNames1 = flowElement2
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.getClass().getSimpleName();
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if (!(classNames1.equals("EndEvent"))) {
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UserTask userTask2 = (UserTask) flowElement2;
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String assginee21 = userTask2
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.getAssignee();
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String assginee22 = assginee21
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.substring(
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assginee21
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.indexOf("{") + 1,
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assginee21
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.indexOf("}"));
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String assignee23 = (String) variables
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.get(assginee22);
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taskModel.setNextPerson(ToolUtils
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.isEmpty(assignee23));
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}
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}
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}
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}
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}
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}
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taskList.add(taskModel);
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}
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}
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map.put("isLogin", "yes");
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map.put("userName",
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(String) req.getSession().getAttribute("userName"));
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map.put("result", "success");
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map.put("data", taskList);
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} else {
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map.put("isLogin", "no");
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}
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return map;
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}
3.angular js前台代码（前台只是做简单的展示，不多讲）：
（1）app.js中配置路由：
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$stateProvider
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.state(‘taskList‘, {
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url: "/taskList",
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views: {
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‘view‘: {
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templateUrl: ‘activi_views/taskList.html‘,
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controller: ‘taskCtr‘
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}
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}
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});
（2）逻辑相关代码：
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angular.module(‘activitiApp‘)
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.controller(‘taskCtr‘, [‘$rootScope‘,‘$scope‘,‘$http‘,‘$location‘,‘$state‘, function($rootScope,$scope,$http,$location,$state){
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$scope.init=function(){
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$http.post("./findTask.do").success(function(result) {
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if(result.isLogin==="yes"){
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console.log(result.data);
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$rootScope.userName=result.userName;
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$scope.taskList=result.data;
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}else{
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$location.path("/login");
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}
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});
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}
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$scope.completeTaskTo=function(task){
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console.log(task);
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$rootScope.task=task;
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$location.path("/completeTaskTo1");
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}
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}])
4.对应的填写相关信息的页面：
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<div id="logdiv1" ng-init="init();">
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<p style="font-size:22px;margin-top:10px">当前任务列表</p>
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<center>
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<table border="1px" style="width:87%;font-size:14px;text-align:center;margin-top:1px;margin-left:2px;position:relative;float:left;" cellSpacing="0px" cellPadding="0px">
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<tr style="background-color:#ccc">
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<td>类型</td>
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<td>ID</td>
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<td>NAME</td>
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<td>ProcessIntanceId</td>
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<td>ProcessDefId</td>
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<td>创建时间</td>
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<td>申请人</td>
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<td>受理人</td>
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<td>申请原因</td>
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<td>申请内容</td>
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<td>操 作</td>
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</tr>
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<tr ng-repeat="task in taskList | orderBy:‘id‘" >
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<td>{{task.taskType}}</td>
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<td>{{task.id}}</td>
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<td>{{task.name}}</td>
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<td>{{task.processInstanceId}}</td>
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<td>{{task.processDefId}}</td>
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<td>{{task.createTime | date:"yyyy-MM-dd HH:mm:ss"}}</td>
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<td>{{task.assignee}}</td>
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<td>{{task.nextPerson}}</td>
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<td>{{task.cause}}</td>
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<td>{{task.content}}</td>
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<td><a href="script:;" ng-click="completeTaskTo(task)">完成任务</a>
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</td>
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</tr>
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</table>
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</center>
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</div>
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activiti自定义流程之Spring整合activiti-modeler实例（七）：任务列表展示
原文：http://blog.csdn.net/hj7jay/article/details/51149167
