<bpmn:startEvent id="StartEvent_1">
<bpmn:outgoing>Flow_1jtymod</bpmn:outgoing>
</bpmn:startEvent>
<bpmn:sequenceFlow id="Flow_1jtymod" sourceRef="StartEvent_1" targetRef="Activity_08hk2ft" />
<bpmn:userTask id="Activity_1nicj02" name="【总经理】审批">
<bpmn:incoming>Flow_11hhq0u</bpmn:incoming>
<bpmn:outgoing>Flow_1ajzlub</bpmn:outgoing>
</bpmn:userTask>
<bpmn:userTask id="Activity_08hk2ft" name="请假申请">
<bpmn:incoming>Flow_1jtymod</bpmn:incoming>
<bpmn:outgoing>Flow_11hhq0u</bpmn:outgoing>
</bpmn:userTask>
@Test
public void startProcessInstanceByKey() {
for (int i = 0; i < 10; i++) {
runtimeService.startProcessInstanceByKey("batch");
}
}
/**
* select distinct RES.*
* FROM ACT_RU_EXECUTION RES
* INNER JOIN ACT_RE_PROCDEF P
* ON RES.PROC_DEF_ID_ = P.ID_
* WHERE RES.PARENT_ID_ is null and ( RES.PROC_INST_ID_ IN ( '11317' , '11321' ) ) order by RES.ID_ asc
* LIMIT 2147483647 OFFSET 0;
*/
@Test
public void createProcessInstanceQuery() {
Set<String> processInstanceIds = new HashSet<>();
processInstanceIds.add("11321");
processInstanceIds.add("11317");
List<ProcessInstance> list = runtimeService.createProcessInstanceQuery()
.processInstanceIds(processInstanceIds)
.list();
System.out.println(list);
}
<bpmn:userTask id="Activity_01oj8gn" name="新节点">
<bpmn:incoming>Flow_1ajzlub</bpmn:incoming>
<bpmn:outgoing>Flow_14eyxev</bpmn:outgoing>
</bpmn:userTask>
目前一些流程已经运行到了【请假申请】,一些运行到了【总经理审批】,这时候部署了第二个版本,新增了一个节点【新节点】,这时候要让以前的实例(尚未运行完)走到最新的,该怎么实现呢?
原实例表:
1、迁移节点
@Test
public void newMigration() {
String sourceProcessDefinitionId = "batch:1:3";
String targetProcessDefinitionId = "batch:2:303";
String sourceActivityId = "Activity_08hk2ft";
String targetActivityId = "Activity_01oj8gn";
MigrationPlan migrationPlan = runtimeService.createMigrationPlan(sourceProcessDefinitionId, targetProcessDefinitionId)
.mapActivities(sourceActivityId, targetActivityId)
.build();
runtimeService.newMigration(migrationPlan)
.processInstanceIds("101", "105")
.execute();
}
实例表改了:
任务表也改了:
这时候完成104
,108
,对应的流程实例就运行结束了。
注意:名称并没有更改,也无法直接迁移到连线。只能迁移到节点。
@Test
public void newMigration() {
String sourceProcessDefinitionId = "batch:1:3";
String targetProcessDefinitionId = "batch:2:303";
String sourceActivityId = "Activity_08hk2ft";
String targetActivityId = "Activity_01oj8gn";
MigrationPlan migrationPlan = runtimeService.createMigrationPlan(sourceProcessDefinitionId, targetProcessDefinitionId)
.mapActivities(sourceActivityId, targetActivityId)
.build();
runtimeService.newMigration(migrationPlan)
.processInstanceIds("125", "129")
.executeAsync();
}
批次查询:
@Test
public void createBatchQuery() {
List<Batch> list = managementService.createBatchQuery()
.list();
for (Batch batch : list) {
System.out.println("#########");
System.out.println(batch.getId());
System.out.println(batch.getType());
System.out.println(batch.getTotalJobs());
System.out.println("#########");
}
}
激活批次执行:
/**
* update ACT_RU_JOB set REV_ = REV_ + 1, SUSPENSION_STATE_ = 1 WHERE JOB_DEF_ID_ = '503';
* ------------------------------------------------------------------------------------------------------------------------
* update ACT_RU_JOBDEF set REV_ = REV_ + 1, SUSPENSION_STATE_ = 1 WHERE ID_ = '504';
* ------------------------------------------------------------------------------------------------------------------------
* update ACT_RU_JOB set REV_ = REV_ + 1, SUSPENSION_STATE_ = 1 WHERE JOB_DEF_ID_ = '503';
* ------------------------------------------------------------------------------------------------------------------------
* update ACT_RU_JOBDEF set REV_ = REV_ + 1, SUSPENSION_STATE_ = 1 WHERE ID_ = '504';
* ------------------------------------------------------------------------------------------------------------------------
*/
@Test
public void activateBatchById() {
String batchId = "502";
managementService.activateBatchById(batchId);
}
camunda框架有bug,这里没有成功执行。
我们可以手动执行ACT_RU_JOB
,执行后ACT_RU_JOB
会产生3个任务,将其完成即可。先完成``instance-migration,最后完成
batch-monitor-job`,监听到迁移完了,会删除批次。
@Test
public void executeJob() {
String jobId = "605";
managementService.executeJob(jobId);
}
删除批次:
采用异步删除,如果发现迁移有误,则可以删除批次
/**
* ------------------------------------------------------------------------------------------------------------------------
* delete FROM ACT_RU_JOB WHERE ID_ = '706' and REV_ = 1;
* ------------------------------------------------------------------------------------------------------------------------
* delete FROM ACT_GE_BYTEARRAY WHERE ID_ = '701' and REV_ = 1;
* ------------------------------------------------------------------------------------------------------------------------
* delete B FROM ACT_GE_BYTEARRAY B INNER JOIN ACT_HI_JOB_LOG J ON B.ID_ = J.JOB_EXCEPTION_STACK_ID_ and J.JOB_EXCEPTION_STACK_ID_ is not null and J.JOB_DEF_ID_ = '704';
* ------------------------------------------------------------------------------------------------------------------------
* delete FROM ACT_HI_JOB_LOG WHERE JOB_DEF_ID_ = '703';
* ------------------------------------------------------------------------------------------------------------------------
* DELETE FROM ACT_RU_JOBDEF WHERE ID_ = '703' and REV_ = 1;
*/
@Test
public void deleteBatch() {
String batchId = "702";
boolean cascade = true;
managementService.deleteBatch(batchId, cascade);
}
@Test
public void getBpmnModelInstance() {
String processDefinitionId = "batch:2:303";
BpmnModelInstance bpmnModelInstance = repositoryService.getBpmnModelInstance(processDefinitionId);
BpmnModelInstance clone = bpmnModelInstance.clone();
ModelElementInstance modelElement = clone.getModelElementById("Activity_01oj8gn");
UserTask userTask = (UserTask) modelElement;
userTask.setName("新节点复制");
userTask.setId("utask_333");
repositoryService.createDeployment().addModelInstance("复制.bpmn", clone).deploy();
}
identityService.setAuthenticatedUserId("peng111");
@Test
public void newMigrationLog() {
identityService.setAuthenticatedUserId("peng111");
String sourceProcessDefinitionId = "batch:2:303";
String targetProcessDefinitionId = "batch:3:1803";
MigrationPlan migrationPlan = runtimeService.createMigrationPlan(sourceProcessDefinitionId, targetProcessDefinitionId)
.mapActivities("Activity_08hk2ft", "Activity_01oj8gn")
.build();
runtimeService.newMigration(migrationPlan)
.processInstanceIds("137")
.execute();
}
另外,历史记录要调到最高
<property name="historyLevel" value="HISTORY_LEVEL_FULL"/>
@Test
public void createUserOperationLogQuery() {
List<UserOperationLogEntry> list = historyService.createUserOperationLogQuery().list();
System.out.println(list);
}
@Test
public void createModification() {
String processDefinitionId = "batch:2:303";
runtimeService.createModification(processDefinitionId)
.startAfterActivity("Activity_1nicj02")
// .startBeforeActivity()
// .startTransition()//跳转到连线,可以触发监听器
.processInstanceIds("121")
.cancelAllForActivity("Activity_08hk2ft", true)//原有的实例节点ID,是否取消原有实例
.execute();
}
@Test
public void updateProcessInstanceSuspensionState() {
//记录日志
identityService.setAuthenticatedUserId("peng111");
runtimeService.updateProcessInstanceSuspensionState()
.byProcessInstanceIds(Arrays.asList("121"))
.suspendAsync();
}
@Test
public void executeJob() {
String jobId = "2304";
managementService.executeJob(jobId);
}
@Test
public void updateProcessInstanceSuspensionState() {
identityService.setAuthenticatedUserId("peng111");
runtimeService.updateProcessInstanceSuspensionState()
.byProcessInstanceIds(Arrays.asList("121"))
.activateAsync();
}
@Test
public void restartProcessInstances() {
//操作人日志记录
identityService.setAuthenticatedUserId("peng111");
String processDefinitionId = "batch:3:1803";
runtimeService.restartProcessInstances(processDefinitionId)
.startTransition("Flow_11hhq0u")//从连线开始
.processInstanceIds("137")
.execute();
}
本质相当于是新发起了一个流程。
@Test
public void deleteProcessInstances() {
List<String> processInstanceIds = new ArrayList<>();
processInstanceIds.add("2002");
processInstanceIds.add("2101");
runtimeService.deleteProcessInstances(processInstanceIds, "测试删除原因", true, true);
//runtimeService.deleteProcessInstancesAsync(processInstanceIds, runtimeService.createProcessInstanceQuery(), "测试删除原因", true, true);
}
@Test
public void deleteProcessInstancesAsync() {
List<String> processInstanceIds = new ArrayList<>();
processInstanceIds.add("2002");
processInstanceIds.add("2101");
runtimeService.deleteProcessInstancesAsync(processInstanceIds, runtimeService.createProcessInstanceQuery(), "测试删除原因", true, true);
}
异步的还需要完成job的手工完成
参考:https://blog.csdn.net/VeastLee/article/details/109546895
会签:
nrOfInstances
实例的数目
nrOfCompletedInstances
完成实例的数目
nrOfActiveInstance
未完成实例的数目
loopCounter
循环计数器,办理人在列表中的索引。
条件${nrOfInstances == nrOfCompletedInstances}
表示所有人员审批完成后会签结束。
条件${ nrOfCompletedInstances == 1}
表示一个人完成审批,该会签就结束。
@Test
public void reject() {
String processInstanceId="";
String message="项目的金额款项结算不正确";
Task task = taskService.createTaskQuery()
.taskAssignee("admin") //当前登录用户的id
.processInstanceId(processInstanceId)
.singleResult();
ActivityInstance tree = runtimeService.getActivityInstance(processInstanceId);
List<HistoricActivityInstance> resultList = historyService
.createHistoricActivityInstanceQuery()
.processInstanceId(processInstanceId)
.activityType("userTask")
.finished()
.orderByHistoricActivityInstanceEndTime()
.asc()
.list();
//得到第一个任务节点的id
HistoricActivityInstance historicActivityInstance = resultList.get(0);
String toActId = historicActivityInstance.getActivityId();
String assignee = historicActivityInstance.getAssignee();
//设置流程中的可变参数
Map<String, Object> taskVariable = new HashMap<>(2);
taskVariable.put("user", assignee);
taskVariable.put("formName", "项目建设");
taskService.createComment(task.getId(), processInstanceId, "驳回原因:" + message);
runtimeService.createProcessInstanceModification(processInstanceId)
.cancelActivityInstance(getInstanceIdForActivity(tree, task.getTaskDefinitionKey()))//关闭相关任务
.setAnnotation("进行了驳回到第一个任务节点操作")
.startBeforeActivity(toActId)//启动目标活动节点
.setVariables(taskVariable)//流程的可变参数赋值
.execute();
}
private String getInstanceIdForActivity(ActivityInstance activityInstance, String activityId) {
ActivityInstance instance = getChildInstanceForActivity(activityInstance, activityId);
if (instance != null) {
return instance.getId();
}
return null;
}
private ActivityInstance getChildInstanceForActivity(ActivityInstance activityInstance, String activityId) {
if (activityId.equals(activityInstance.getActivityId())) {
return activityInstance;
}
for (ActivityInstance childInstance : activityInstance.getChildActivityInstances()) {
ActivityInstance instance = getChildInstanceForActivity(childInstance, activityId);
if (instance != null) {
return instance;
}
}
return null
}
写法2:撤回
ProcessEngine processEngine = ProcessEngines.getDefaultProcessEngine();
TaskService taskService = processEngine.getTaskService();
HistoryService historyService = processEngine.getHistoryService();
RuntimeService runtimeService = processEngine.getRuntimeService();
RepositoryService repositoryService = processEngine.getRepositoryService();
//获取当前任务,未办理任务id
HistoricTaskInstance currTask = historyService.createHistoricTaskInstanceQuery()
.taskId(taskId)
.singleResult();
//获取流程实例
ProcessInstance processInstance = runtimeService.createProcessInstanceQuery()
.processInstanceId(currTask.getProcessInstanceId())
.singleResult();
//获取流程定义
ProcessDefinitionEntity processDefinitionEntity = (ProcessDefinitionEntity) ((RepositoryServiceImpl) repositoryService)
.getDeployedProcessDefinition(currTask.getProcessDefinitionId());
ActivityImpl currActivity = (processDefinitionEntity)
.findActivity(currTask.getTaskDefinitionKey());
//清除当前活动出口
List<PvmTransition> originPvmTransitionList = new ArrayList<PvmTransition>();
List<PvmTransition> pvmTransitionList = currActivity.getOutgoingTransitions();
for (PvmTransition pvmTransition : pvmTransitionList) {
originPvmTransitionList.add(pvmTransition);
}
pvmTransitionList.clear();
//查找上一个user task节点
List<HistoricActivityInstance> historicActivityInstances = historyService
.createHistoricActivityInstanceQuery().activityType("userTask")
.processInstanceId(processInstance.getId())
.finished()
.orderByHistoricActivityInstanceEndTime().asc().list();
TransitionImpl transitionImpl = null;
if (historicActivityInstances.size() > 0) {
ActivityImpl lastActivity = (processDefinitionEntity)
.findActivity(historicActivityInstances.get(0).getActivityId());
//创建当前任务的新出口
transitionImpl = currActivity.createOutgoingTransition(lastActivity.getId());
transitionImpl.setDestination(lastActivity);
}
// 完成任务
List<Task> tasks = taskService.createTaskQuery()
.processInstanceId(processInstance.getId())
.taskDefinitionKey(currTask.getTaskDefinitionKey()).list();
for (Task task : tasks) {
taskService.complete(task.getId());
historyService.deleteHistoricTaskInstance(task.getId());
}
// 恢复方向
currActivity.getOutgoingTransitions().remove(transitionImpl);
for (PvmTransition pvmTransition : originPvmTransitionList) {
pvmTransitionList.add(pvmTransition);
}
或
/**
* 撤回流程
*/
private void recall() {
List<String> roleCodeList = new ArrayList<>();
roleCodeList.add("user1");
// 取得已提交的任务
HistoricTaskInstance historicTaskInstance = historyService.createHistoricTaskInstanceQuery()
.taskCandidateGroupIn(roleCodeList).singleResult();
// HistoricTaskInstance historicTaskInstance =
// historyService.createHistoricTaskInstanceQuery().taskAssignee(assignee).singleResult();
// HistoricTaskInstance historicTaskInstance =
// historyService.createHistoricTaskInstanceQuery().taskCandidateUser(assignee).singleResult();
System.out.println(historicTaskInstance.getId());
// 取得流程实例
ProcessInstance processInstance = runtimeService.createProcessInstanceQuery()
.processInstanceId(historicTaskInstance.getProcessInstanceId()).singleResult();
System.out.println(processInstance.getId());
Map<String, Object> variables = runtimeService.getVariables(historicTaskInstance.getExecutionId());
System.out.println(variables);
// 取得流程定义
ProcessDefinitionEntity definitionEntity = (ProcessDefinitionEntity) repositoryService
.getProcessDefinition(historicTaskInstance.getProcessDefinitionId());
System.out.println(definitionEntity);
// 取得上一步活动
ActivityImpl hisActivity = definitionEntity.findActivity(historicTaskInstance.getTaskDefinitionKey());
System.out.println(hisActivity);
// 取得当前活动
List<PvmTransition> currTransitionList = hisActivity.getOutgoingTransitions();
System.out.println(currTransitionList);
for (PvmTransition currTransition : currTransitionList) {
PvmActivity currActivity = currTransition.getDestination();
List<Task> currTasks = taskService.createTaskQuery().processInstanceId(processInstance.getId())
.taskDefinitionKey(currActivity.getId()).list();
for (Task currTask : currTasks) {
ArrayList<PvmTransition> oriPvmTransitionList = new ArrayList<>();
List<PvmTransition> pvmTransitionList = currActivity.getOutgoingTransitions();
System.out.println(pvmTransitionList);
for (PvmTransition pvmTransition : pvmTransitionList) {
oriPvmTransitionList.add(pvmTransition);
}
System.out.println(oriPvmTransitionList);
pvmTransitionList.clear();
// 建立新方向
ActivityImpl nextActivityImpl = ((ProcessDefinitionImpl) definitionEntity)
.findActivity(currActivity.getId());
TransitionImpl newTransition = nextActivityImpl.createOutgoingTransition();
newTransition.setDestination(hisActivity);
taskService.claim(currTask.getId(), null);
taskService.complete(currTask.getId(), variables);
historyService.deleteHistoricTaskInstance(currTask.getId());
// 恢复方向
hisActivity.getIncomingTransitions().remove(newTransition);
List<PvmTransition> pvmTList = currActivity.getOutgoingTransitions();
pvmTList.clear();
for (PvmTransition pvmTransition : oriPvmTransitionList) {
pvmTransitionList.add(pvmTransition);
}
System.out.println(pvmTransitionList);
}
}
historyService.deleteHistoricTaskInstance(historicTaskInstance.getId());
}
//所有的审批意见都会存到 ACT_HI_COMMENT 的表中,因此需要如下接口获取
List<Comment> taskComments = taskService.getTaskComments(taskId);
//完整示例
@Test
public void taskGetComment(){
List<HistoricActivityInstance> list = historyService.createHistoricActivityInstanceQuery()
.processInstanceId("d66d9908-9a71-11ea-9906-40e230303674")
.orderByHistoricActivityInstanceStartTime()
.asc()
.list();
List<Map<String,Object>> result=new ArrayList<>(list.size());
System.out.println(list.size());
for (HistoricActivityInstance historicActivityInstance : list) {
Map<String,Object> map=new HashMap<>(5);
String taskId = historicActivityInstance.getTaskId();
List<Comment> taskComments = taskService.getTaskComments(taskId);
System.out.println(taskComments.size());
map.put("activityName",historicActivityInstance.getActivityName());
map.put("activityType",matching(historicActivityInstance.getActivityType()));
map.put("assignee",historicActivityInstance.getAssignee()==null?"无":historicActivityInstance.getAssignee());
map.put("startTime",DateFormatUtils.format(historicActivityInstance.getStartTime(),"yyyy-MM-dd HH:mm:ss") );
map.put("endTime",DateFormatUtils.format(historicActivityInstance.getEndTime(),"yyyy-MM-dd HH:mm:ss"));
map.put("costTime",getDatePoor(historicActivityInstance.getEndTime(),historicActivityInstance.getStartTime()));
if (taskComments.size()>0){
map.put("message",taskComments.get(0).getFullMessage());
}else {
map.put("message","无");
}
result.add(map);
}
System.out.println(JSON.toJSONString(result));
}
private String matching(String ActivityType){
String value="";
switch (ActivityType){
case "startEvent":
value="流程开始";
break;
case "userTask":
value="用户处理";
break;
case "noneEndEvent":
value="流程结束";
break;
default:
value="未知节点";
break;
}
return value;
}
public String getDatePoor(Date endDate, Date nowDate) {
long nd = 1000 * 24 * 60 * 60;
long nh = 1000 * 60 * 60;
long nm = 1000 * 60;
long ns = 1000;
// 获得两个时间的毫秒时间差异
long diff = endDate.getTime() - nowDate.getTime();
// 计算差多少天
long day = diff / nd;
// 计算差多少小时
long hour = diff % nd / nh;
// 计算差多少分钟
long min = diff % nd % nh / nm;
// 计算差多少秒//输出结果
long sec = diff % nd % nh % nm / ns;
return day + "天" + hour + "小时" + min + "分钟"+ sec + "秒";
}
//结果展示
[{
"costTime": "0天0小时0分钟0秒",
"activityName": "开始",
"startTime": "2020-05-20 16:13:50",
"assignee": "无",
"endTime": "2020-05-20 16:13:50",
"activityType": "流程开始",
"message": "无"
}, {
"costTime": "0天0小时1分钟2秒",
"activityName": "数据处理",
"startTime": "2020-05-20 16:13:50",
"assignee": "ass001",
"endTime": "2020-05-20 16:14:53",
"activityType": "用户处理",
"message": "无"
}, {
"costTime": "0天0小时1分钟25秒",
"activityName": "审批",
"startTime": "2020-05-20 16:14:53",
"assignee": "0000",
"endTime": "2020-05-20 16:16:18",
"activityType": "用户处理",
"message": "驳回原因:数据又遗漏"
}, {
"costTime": "0天0小时0分钟25秒",
"activityName": "数据处理",
"startTime": "2020-05-20 16:16:18",
"assignee": "ass001",
"endTime": "2020-05-20 16:16:44",
"activityType": "用户处理",
"message": "无"
}, {
"costTime": "0天0小时0分钟19秒",
"activityName": "审批",
"startTime": "2020-05-20 16:16:44",
"assignee": "0000",
"endTime": "2020-05-20 16:17:03",
"activityType": "用户处理",
"message": "驳回原因:数据有空值"
}, {
"costTime": "0天0小时0分钟5秒",
"activityName": "数据处理",
"startTime": "2020-05-20 16:17:03",
"assignee": "ass001",
"endTime": "2020-05-20 16:17:08",
"activityType": "用户处理",
"message": "无"
}, {
"costTime": "0天0小时0分钟19秒",
"activityName": "审批",
"startTime": "2020-05-20 16:17:08",
"assignee": "0000",
"endTime": "2020-05-20 16:17:28",
"activityType": "用户处理",
"message": "数据审批通过"
}, {
"costTime": "0天0小时0分钟0秒",
"activityName": "结束",
"startTime": "2020-05-20 16:17:28",
"assignee": "无",
"endTime": "2020-05-20 16:17:28",
"activityType": "流程结束",
"message": "无"
}]
use workflow;
set sql_safe_updates=0;
DELETE FROM act_hi_actinst;
DELETE FROM act_hi_comment;
DELETE FROM act_hi_op_log;
DELETE FROM act_hi_procinst;
DELETE FROM act_hi_taskinst;
DELETE FROM act_hi_varinst;
DELETE FROM act_ge_bytearray;
DELETE FROM act_ru_task;
DELETE FROM act_ru_variable;
DELETE FROM act_ru_execution;
DELETE FROM act_re_deployment;
DELETE FROM act_re_procdef;
如果遇到外键约束检查:
SET foreign_key_checks = 0;
-- delete sql script
SET foreign_key_checks = 1;
代码参考:https://github.com/zhoupengwa/ProcessEngineDemo
删除某一个流程实例相关的数据(最后两个表是我自己加的)
USE workflow;
SET sql_safe_updates=0;
SET FOREIGN_KEY_CHECKS=0;
DELETE FROM ACT_HI_ACTINST WHERE ROOT_PROC_INST_ID_='8607';
DELETE FROM ACT_HI_COMMENT WHERE PROC_INST_ID_='8607';
DELETE FROM ACT_HI_OP_LOG WHERE ROOT_PROC_INST_ID_='8607' OR PROC_INST_ID_='8607';
DELETE FROM ACT_HI_PROCINST WHERE ID_='8607';
DELETE FROM ACT_HI_TASKINST WHERE ROOT_PROC_INST_ID_='8607';
DELETE FROM ACT_HI_VARINST WHERE ROOT_PROC_INST_ID_='8607';
DELETE FROM ACT_GE_BYTEARRAY WHERE ROOT_PROC_INST_ID_='8607';
DELETE FROM ACT_RU_TASK WHERE PROC_INST_ID_='8607';
DELETE FROM ACT_RU_VARIABLE WHERE PROC_INST_ID_='8607';
DELETE FROM ACT_RU_EXECUTION WHERE ROOT_PROC_INST_ID_='8607' OR PROC_INST_ID_='8607';
DELETE FROM ACT_HI_IDENTITYLINK WHERE ROOT_PROC_INST_ID_='8607';
-- 清理自定义的一些表
delete from act_custom_user_process_filter where process_instance_id='8607';
delete from act_custom_audit_oper_log where process_instance_id = '8607';
delete from act_custom_reject_record where process_instance_id = '8607';
SET FOREIGN_KEY_CHECKS=1;
学习来源:腾讯课堂
文章浏览阅读710次,点赞13次,收藏7次。它的名称有点不同 - aarch64-linux-android-addr2line。尽管该实用程序的名称不包含单词arm,但它成功地解密了arm64-v8下的堆栈跟踪,并通常感知arm64-v8的字符。是 NDK 自带的调试工具,可以用来分析 so 崩溃时输出的的内存地址。之后就是通过 cmd 进入到这个路径。找到了 64 位所需的实用程序。_arm-linux-androideabi
javaweb-邮件发送 摘要: 本文介绍了邮件传输协议(SMTP和POP3)以及电子邮件的发送和接收过程。还讨论了纯文本文件、带图片和附件的邮件发送方法,以及通过servlet方式注册邮箱和使用springboot框架发送邮件的实现。
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看到codepen里面有的按钮搞得很炫酷,但其实也不是很难,就学习记录一下。
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在 GNU Radio OFDM 系统中,一个非常重要的环节是在接收端准确地同步和检测发送端发出的信号。这就是 Schmidl & Cox 同步算法发挥作用的地方。Schmidl & Cox 算法是一种用于 OFDM 信号的时间同步的技术。本文对其底层 C++ 源码进行学习记录。
REST,表述性状态转换,他是一种软件架构风格使用URL定位资源,HTTP动词描述操作根据发出请求类型来区分操作此为风格,是约定方式,可以打破描述模块的功能通常使用复数,也就是加s的格式来描述,表示此类资源,而非单个资源。
允许一个对象在其内部状态改变时改变它的行为。对象看起来似乎修改了它的类。