本文将为您提供关于Understandingslicenotation的详细介绍，同时，我们还将为您提供关于IDEAorg.apache.ibatis.binding.BindingException

本文将为您提供关于Understanding slice notation的详细介绍，同时，我们还将为您提供关于IDEA org.apache.ibatis.binding.BindingException: Invalid bound statement (not found):、L177 Arctic ice brings an understanding of ancient Europe’s economy、Mac 启动 MongoDB 报错：exception in initAndListen: NonExistentPath: Data directory /data/db not found., t...、Mybatis BindingException: Invalid bound statement (not found)的实用信息。

本文目录一览：

• Understanding slice notation
• IDEA org.apache.ibatis.binding.BindingException: Invalid bound statement (not found):
• L177 Arctic ice brings an understanding of ancient Europe’s economy
• Mac 启动 MongoDB 报错：exception in initAndListen: NonExistentPath: Data directory /data/db not found., t...
• Mybatis BindingException: Invalid bound statement (not found)

Understanding slice notation

IDEA org.apache.ibatis.binding.BindingException: Invalid bound statement (not found):

参考：https://blog.csdn.net/guozhaohui628/article/details/80438654

1. 在配置mybatis的代理映射文件的时，只要接口文件名和xml文件名一致、xml文件中的命名空间指向接口文件，一般都没问题的，如果还有问题，就是xml文件没有被复制到目标处

2.如果是idea中使用maven做包管理，那么这时需要在pom.xml中的build节点声明mybatis的映射文件资源    

<build>
    <!--idea默认不会移到代码文件夹中的xml资源的-->
    <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.xml</include>
            </includes>
        </resource>
    </resources>
</build>

 

L177 Arctic ice brings an understanding of ancient Europe’s economy

Greenland''s icy mountains are not an obvious place to search for an archive of economic history, but a study just published in the Proceedings of the National Academy of Sciences shows that they provide one. Joseph McConnell of the Desert Research Institute, in Reno, Nevada, and (主题句）his colleagues have tracked economic activity in Europe and the Mediterranean地中海 over the centuries by measuring variations in the amount of lead in a core of Greenlandic ice. 

Lead is a good proxy (代用） for economic activity because it is a by-product of silvermaking 银矿 (lead and silver often occur in the same ore, known as galena), and therefore of the money supply. Extracting silver from galena方铅矿 involves boiling off the lead. Winds from Europe carried to Greenland enough lead pollution from this process for it to be preserved in the layers of snow that, compacted 插入语, form the island’s ice cap.  (解释这种测量方法的可行性）

Although the lead concentration in the core that Dr McConnell looked at shows many peaks and troughs, some overall patterns are clear. Emissions began to rise in around 1000BC. This corresponds to the spread of Phoenician traders and settlers from their home cities in the Levant into the western Mediterranean, and the consequent exploitation of galena mines in Iberia.伊比利亚

The rise and fall of Rome is also visible. An increase in lead concentration coincided with Rome’s victories in the Punic wars, against Carthage, the largest Phoenician腓尼基人 colony, during in the third and second centuries BC （公元前 before christ）. This was followed by a fall during the civil strife of the first century BC, a rise again when Augustus abolished the Republic and brought the pax Romana of the Empire, and another fall during the third century AD, when the state was engulfed once more by civil war, and also suffered invasion from the east.

The decline (衰弱)in lead pollution was enhanced by Rome’s switch from the silver denarius 便士, which had been increasingly debased with copper, to a gold standard. Even allowing for that, though, the European dark ages, during which Spain was occupied by the Visigoths, are clearly visible in the record—as is the point when civilisation starts to return with the rise of the Frankish state that, under Charlemagne 查理曼大帝, became the “Holy Roman Empire”, and with the takeover of Spain by the Umayyad caliphate.

 

1科学家通过测量格陵兰冰芯中铅含量的变化，研究在欧洲和地中海地区近几个世纪的经济活动。

2公元前1000年左右，铅排放量开始上升。与之对应，腓尼基商人及其殖民者 (开始) 从黎凡特乡城向西地中海扩张，随后他们在伊比利亚开采方铅矿 。

3罗马的兴衰也由此可见。铅浓度增加，恰逢罗马在‘布匿战争’中大胜迦太基，随后，浓度下降是由于公元前一世纪的内乱，而又再度崛起，因于‘奥古斯都’废除了共和国，而带来‘罗马和平时代’的太平盛世，但，公元三世纪，浓度再一次下降，当时国家再次惨遭内战以及东方的入侵。

4金本位制度让铅浓度降低 （后面扯了金本位制度的历史）

Mac 启动 MongoDB 报错：exception in initAndListen: NonExistentPath: Data directory /data/db not found., t...

这是主要错误：

initAndListen 中的异常：NonExistentPath：找不到数据目录 / data / db。

最新版的 Mac 系统 Catalina 发生了令人惊讶的更改：它不允许更改根目录（这也在论坛主题中进行了讨论）：

% sudo mkdir -p /data/db
mkdir: /data/db: Read-only file system

不幸的是，除了在 Catalina 功能中简短提及之外，这在 Apple 的 Catalina 发行说明中没有明确说明：

macOS Catalina在专用的只读系统卷中运行

由于该目录 /data/db 被编码为 MongoDB 默认目录，因此一种解决方法是指定一个 dbpath 不在根目录上的目录。例如：

mongod --dbpath ~/data/db

这会将 MongoDB 的数据放在您的主目录中。只要确保该路径～/data/db 确实存在。

替代方法

一种替代方法是通过利用 macOS 上的在 macOS 上安装 MongoDB 社区版中的说明进行操作 brew：

brew tap mongodb/brew
brew install mongodb-community

默认情况下，这将创建一些其他文件：

• 配置文件（/usr/local/etc/mongod.conf）
• 日志目录路径（/usr/local /var/log /mongodb）
• 数据目录路径（/usr/local /var/mongodb） 要运行，mongod 您可以：
• 从命令行手动运行命令（为方便起见，可以使用别名）：

mongod --config /usr/local/etc/mongod.conf

• 使用来将 MongoDB 作为服务运行 brew services。请注意，这会将 MongoDB 作为独立节点（而不是副本集）运行，因此取决于 oplog 的功能（例如 changestream）将无法工作，除非您修改 mongod 配置文件：

brew services start mongodb-community

参考博客：https://stackoverflow.com/questions/58283257/mongodb-cant-find-data-directory-after-upgrading-to-mac-os-10-15-catalina

Mybatis BindingException: Invalid bound statement (not found)

这个问题看似简单，我们通常处理方式考虑的

1.xml文件和dao包下接口对应的问题；

1.1 接口名和namespace，方法名和id名，参数和parameterType 等。

2.yml的配置文件也是要重要考虑

这是正确的

spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://192.168.11.33:3306/springcloud2020?serverTimezone=GMT&useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: 123456

mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.atguigu.springcloud.entities    # 所有Entity别名类所在包

这是错误的

spring:
  application:
    name: cloud-payment-service
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource            # 当前数据源操作类型
    driver-class-name: org.gjt.mm.mysql.Driver              # mysql驱动包
    url: jdbc:mysql://192.168.11.33:3306/springcloud2020?serverTimezone=GMT&useUnicode=true&characterEncoding=utf-8&useSSL=false
    username: root
    password: 123456

  mybatis:
    mapper-locations: classpath:mapper/*.xml
    type-aliases-package: com.atguigu.springcloud.entities    # 所有Entity别名类所在包

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本文标签：

• Understanding
• Slice
• Notation
• Programming