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1

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

public class MyUtil {
    public static Map<Integer,String> getAccountMap(List<Account> accounts){
        Map<Integer,String> listMap=new HashMap<Integer, String>();
        for(Account accountx:accounts){
            listMap.put(accountx.getId(),accountx.getNickname());
        }
        return listMap;
    }

quartz 如何让定时任务全部执行完毕后自动关闭

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quartz

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

public static void main(String[] args) throws SchedulerException {
    //创建一个jobDetail的实例，将该实例与HelloJob Class绑定
      JobDetail jobDetail= JobBuilder.newJob(QuartzDemo.class).withIdentity("my job").build();
      //cronTrigger   cron表达式 0 0/5 18 * * ? 每天18点到18.59 每隔5分钟触发
    // https://www.pppet.net/ 在线cron表达式编写
    CronTrigger cronTrigger=TriggerBuilder.newTrigger().withIdentity("cronTrigger")
            .withSchedule(CronScheduleBuilder.cronSchedule("0 0/1 19 * * ?")).build();

            //创建schedule实例
        StdSchedulerFactory factory=new StdSchedulerFactory();
        Scheduler scheduler=factory.getScheduler();
        scheduler.start();
        scheduler.scheduleJob(jobDetail,cronTrigger);
}

@include与指令的区别

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JSP

class="cursor-pointer"> 详细描述

mybatis和spring整合JDBC报错获取不到

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mybatis

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

配置好tomcat之后，并不能通过ip+端口访问成功

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1

jetty/tomcat

class="cursor-pointer"> 详细描述

如何在实现保存排序的需求同时保证逻辑上不会出错

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class="cursor-pointer"> 详细描述

class="cursor-pointer"> 源码

    //保存排序
    @RequestMapping(value = "/UpdateOrderBy",method = RequestMethod.POST)
    public CodeMessageDate updateOrderBy(@RequestBody List<WorkCollection> workCollections){
        if(null==workCollections||workCollections.size()==0){
            return new CodeMessageDate(0,"无传入数据");
        }else{
            List<WorkCollection> listBackup = new ArrayList<>();
            List<WorkCollection> list = new ArrayList<>();
            for(WorkCollection collection:workCollections){
                WorkCollection workCollectionBackup = new WorkCollection();
                WorkCollection workCollection = new WorkCollection();
                workCollection.setCollectionId(collection.getCollectionId());
                if(null==workCollectionService.selectCollection(workCollection)){
                    return new CodeMessageDate(0,"未找到该条数据",workCollection);
                }else if(null==collection.getCollectionOrderBy()||collection.getCollectionOrderBy()<=0) {
                    return new CodeMessageDate(0, "未找到排序数据",workCollection);
                }else {
                    workCollectionBackup.setCollectionId(workCollectionService.selectCollection(workCollection).getCollectionId());
                    workCollectionBackup.setCollectionOrderBy(workCollectionService.selectCollection(workCollection).getCollectionOrderBy());
                    listBackup.add(workCollectionBackup);
                    workCollection.setCollectionOrderBy(collection.getCollectionOrderBy());
                    list.add(workCollection);
                }
            }
            workCollectionService.updateOrderBy(list);
            if (null==workCollectionService.selectCollectionOrderBy()||workCollectionService.selectCollectionOrderBy().size()==0){
                return new CodeMessageDate(1,"保存排序成功");
            }else{
                workCollectionService.updateOrderBy(listBackup);
                return new CodeMessageDate(0,"排序数据错误，操作已回退");
            }

        }

    //保存排序
    int updateOrderBy(@Param(value = "list")List<WorkCollection> list);

    <!--倒叙排序作品集order_by-->
    <select id="selectCollectionOrder" resultMap="workCollectionMap">
        select collection_order_by from work_collection order by collection_order_by desc
    </select>
    <!--循环遍历批量保存排序-->
    <update id="updateOrderBy" parameterType="java.util.List">
        <foreach collection="list" item="workCollection" separator=";">
            update work_collection set collection_order_by=#{workCollection.collectionOrderBy} where collection_id=#{workCollection.collectionId}
        </foreach>
    </update>
    <!--通过作品集Id查询作品集信息-->
    <select id="selectCollection" resultMap="workCollectionMap">
        select * from work_collection where collection_id=#{collectionId}
    </select>
    <!--通过groupBy和having筛选查询order_by重复-->
    <select id="selectCollectionOrderBy" resultMap="workCollectionMap">
        select collection_order_by from work_collection group by collection_order_by having count(*)>1
    </select>

    //新增作品集
    int insertCollection(WorkCollection workCollection);

    //保存排序-通过id查询作品集
    WorkCollection selectCollection(WorkCollection workCollection);

    //保存排序-查询order_by字段是否有重复
    List<WorkCollection> selectCollectionOrderBy();

    //保存排序
    int updateOrderBy(List<WorkCollection> list);

 //保存排序-通过id查询作品集
    public WorkCollection selectCollection(WorkCollection workCollection){
        return workCollectionMapper.selectCollection(workCollection);
    }

    //保存排序-查询order_by字段是否有重复
    public List<WorkCollection> selectCollectionOrderBy(){
        return workCollectionMapper.selectCollectionOrderBy();
    }

    //保存排序
    public int updateOrderBy(List<WorkCollection> list){ return workCollectionMapper.updateOrderBy(list);}

springboot 如何配置多数据眼实现读写分离

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复盘踩坑

class="cursor-pointer"> 详细描述

阿里云中迁移数据板块，无法加载腾讯云的bucket

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第三方API调用

class="cursor-pointer"> 详细描述

class="cursor-pointer"> 错误截图

Tuscany服务端,可以启动,但打jar包后运行报错

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tuscany

class="cursor-pointer"> 详细描述

Exception in thread "main" java.lang.IllegalStateException: org.apache.tuscany.sca.runtime.ActivationException: org.apache.tuscany.sca.runtime.ActivationException: org.oasisopen.sca.Se
rviceRuntimeException: No provider factory is registered for binding {http://tuscany.apache.org/xmlns/sca/1.1}binding.rmi
        at org.apache.tuscany.sca.node.impl.NodeImpl.start(NodeImpl.java:178)
        at com.jnshu.mainApplication.MainApplication.main(MainApplication.java:12)
Caused by: org.apache.tuscany.sca.runtime.ActivationException: org.apache.tuscany.sca.runtime.ActivationException: org.oasisopen.sca.ServiceRuntimeException: No provider factory is reg
istered for binding {http://tuscany.apache.org/xmlns/sca/1.1}binding.rmi
        at org.apache.tuscany.sca.core.assembly.impl.CompositeActivatorImpl.activate(CompositeActivatorImpl.java:95)
        at org.apache.tuscany.sca.node.impl.NodeImpl.start(NodeImpl.java:146)
        ... 1 more
Caused by: org.apache.tuscany.sca.runtime.ActivationException: org.oasisopen.sca.ServiceRuntimeException: No provider factory is registered for binding {http://tuscany.apache.org/xmlns
/sca/1.1}binding.rmi
        at org.apache.tuscany.sca.core.assembly.impl.CompositeActivatorImpl.activateComponent(CompositeActivatorImpl.java:140)
        at org.apache.tuscany.sca.core.assembly.impl.CompositeActivatorImpl.activate(CompositeActivatorImpl.java:92)
        ... 2 more
Caused by: org.oasisopen.sca.ServiceRuntimeException: No provider factory is registered for binding {http://tuscany.apache.org/xmlns/sca/1.1}binding.rmi
        at org.apache.tuscany.sca.core.assembly.impl.RuntimeEndpointImpl.getBindingProvider(RuntimeEndpointImpl.java:885)
        at org.apache.tuscany.sca.core.assembly.impl.RuntimeEndpointImpl.getBindingInterfaceContract(RuntimeEndpointImpl.java:1007)
        at org.apache.tuscany.sca.core.assembly.impl.RuntimeEndpointImpl.validateServiceInterfaceCompatibility(RuntimeEndpointImpl.java:626)
        at org.apache.tuscany.sca.core.assembly.impl.CompositeActivatorImpl.activate(CompositeActivatorImpl.java:258)
        at org.apache.tuscany.sca.core.assembly.impl.CompositeActivatorImpl.activate(CompositeActivatorImpl.java:240)
        at org.apache.tuscany.sca.core.assembly.impl.CompositeActivatorImpl.activateComponent(CompositeActivatorImpl.java:131)
        ... 3 more

签到系统的设计

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1

复盘踩坑

class="cursor-pointer"> 详细描述