【转】The content of element type "configuration" must match "(properties?,settings?,typeAliases?,typeHandlers?,objectFactory?...

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
  3. "http://mybatis.org/dtd/mybatis-3-config.dtd">
  4. <!-- 注意:每个标签必须按顺序写,不然蛋疼的DTD会提示错误:The content of element type "configuration" must match "(properties?,settings?,typeAliases?,typeHandlers?,objectFactory?,objectWrapperFactory?,plugins?,environments?,mappers?)". -->
  5. <configuration>
  6. <!-- 属性配置 -->
  7. <properties resource="com/mybatisdemo/config/mysql-jdbc-connection.properties">
  8. <!-- 相同属性:最高优先级的属性是那些作为方法参数的,然后是资源/url 属性,最后是 properties元素中指定的属性 -->
  9. <property name="username" value="root"/>
  10. <property name="password" value="sa"/>
  11. </properties>
  12. <!-- 设置缓存和延迟加载等等重要的运行时的行为方式 -->
  13. <settings>
  14. <!-- 设置超时时间,它决定驱动等待一个数据库响应的时间  -->
  15. <setting name="defaultStatementTimeout" value="25000"/>
  16. </settings>
  17. <!-- 别名 -->
  18. <typeAliases>
  19. <typeAlias alias="UserInfo" type="com.mybatisdemo.entity.UserInfo"/>
  20. </typeAliases>
  21. <environments default="development">
  22. <!-- environment 元素体中包含对事务管理和连接池的环境配置 -->
  23. <environment id="development">
  24. <transactionManager type="JDBC" />
  25. <!-- type分三种:
  26. UNPOOLED是每次被请求时简单打开和关闭连接
  27. UNPOOLED的数据源仅仅用来配置以下 4 种属性driver,url,username,password
  28. POOLED :JDBC连接对象的数据源连接池的实现,不直接支持第三方数据库连接池
  29. -->
  30. <dataSource type="POOLED">
  31. <property name="driver" value="${driver}" />
  32. <property name="url" value="${url}" />
  33. <property name="username" value="${username}" />
  34. <property name="password" value="${password}" />
  35. </dataSource>
  36. </environment>
  37. </environments>
  38. <!-- ORM映射文件 -->
  39. <mappers>
  40. <mapper resource="com/mybatisdemo/entity/config/UserInfoSqlMap.xml" />
  41. </mappers>
  42. </configuration>

注意:

①xml中的标签顺序不能随便调换,否则会提示错误

②MyBatis使用自带的数据库连接池,不直接支持第三方连接池,不过网上有创建第三方连接池的方法

③以前别名(<typeAliases>)可以在sqlMap标签中创建,但现在需要在configuration标签中创建

④该配置文件可随意取名,在读取配置文件时指定该XML文件路径即可:

  1. //读取核心配置文件
  2. Reader reader = Resources.getResourceAsReader("com/mybatisdemo/config/Configuration.xml");
  3. //创建SessionFactory实例
  4. SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);

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