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mybatis支持属性使用驼峰的命名

mybatis支持属性使用驼峰的命名

作者: 秋名山车神_f776 | 来源:发表于2018-04-12 20:48 被阅读0次

参考:http://blog.chinaunix.net/uid-26244834-id-3268354.html

在Mybatis的源码中发现Configuration类,是mybatis的配置中心:

Java代码 <embed wmode="transparent" src="http://deific.iteye.com/javascripts/syntaxhighlighter/clipboard_new.swf" flashvars="clipboard=%20public%20class%20Configuration%20%7B%20%0A%20protected%20Environment%20environment%3B%20%0A%20protected%20boolean%20safeRowBoundsEnabled%20%3D%20true%3B%20%0A%20protected%20boolean%20mapUnderscoreToCamelCase%20%3D%20false%3B%20%0A%20protected%20boolean%20lazyLoadingEnabled%20%3D%20false%3B%0A" quality="high" allowscriptaccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" width="14" height="15"> [ 收藏代码

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  1. public class Configuration {
  2. protected Environment environment;
  3. protected boolean safeRowBoundsEnabled = true;
  4. protected boolean mapUnderscoreToCamelCase = false;
  5. protected boolean lazyLoadingEnabled = false;

其中属性mapUnderscoreToCamelCase表示是否启用下划线与驼峰式命名规则的映射(如first_name => firstName)。其实mybatis是支持数据库属性和实体对象的驼峰命名映射,只需要开启这个配置即可。

使用方法:
mybatis和spring结合使用时(java web工程),配置:

Java代码 <embed wmode="transparent" src="http://deific.iteye.com/javascripts/syntaxhighlighter/clipboard_new.swf" flashvars="clipboard=%3Cbean%20id%3D%22sqlSessionFactory%22%20class%3D%22org.mybatis.spring.SqlSessionFactoryBean%22%3E%0A%20%20%20%20%20%20%20%20%20%20%3Cproperty%20name%3D%22mapperLocations%22%20value%3D%22classpath%3AsqlMapper%2F*%22%20%2F%3E%0A%20%20%20%20%20%20%20%20%20%20%3Cproperty%20name%3D%22dataSource%22%20ref%3D%22dataSource%22%20%2F%3E%0A%20%20%20%20%20%20%20%20%20%20%3Cproperty%20name%3D%22configLocation%22%20value%3D%22classpath%3Amybatis-config.xml%22%3E%3C%2Fproperty%3E%0A%20%20%20%20%20%3C%2Fbean%3E%0Amybatis-config.xml%EF%BC%9A%0A%3Cconfiguration%3E%0A%20%20%20%20%20%3Csettings%3E%0A%20%20%20%20%20%20%20%20%20%20%3Csetting%20name%3D%22mapUnderscoreToCamelCase%22%20value%3D%22true%22%20%2F%3E%0A%20%20%20%20%20%3C%2Fsettings%3E%0A%3C%2Fconfiguration%3E%0A" quality="high" allowscriptaccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" width="14" height="15"> [ 收藏代码

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  1. <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
  2. <property name="mapperLocations" value="classpath:sqlMapper/*" />
  3. <property name="dataSource" ref="dataSource" />
  4. <property name="configLocation" value="classpath:mybatis-config.xml"></property>
  5. </bean>
  6. mybatis-config.xml:
  7. <configuration>
  8. <settings>
  9. <setting name="mapUnderscoreToCamelCase" value="true" />
  10. </settings>
  11. </configuration>

mybatis单独使用时(java project工程),配置如下:

Java代码 <embed wmode="transparent" src="http://deific.iteye.com/javascripts/syntaxhighlighter/clipboard_new.swf" flashvars="clipboard=%20%20%20%20%20%20%20%20Configuration%20configuration%20%3D%20new%20Configuration(environment)%3B%0A%20%20%20%20%20%20%20%20configuration.setLazyLoadingEnabled(true)%3B%0A%20%20%20%20%20%20%20%20%2F%2F%20%E5%90%AF%E7%94%A8%E4%B8%8B%E5%88%92%E7%BA%BF%E4%B8%8E%E9%A9%BC%E5%B3%B0%E5%BC%8F%E5%91%BD%E5%90%8D%E8%A7%84%E5%88%99%E7%9A%84%E6%98%A0%E5%B0%84%EF%BC%88%E5%A6%82first_name%20%3D%3E%20firstName%EF%BC%89%0A%20%20%20%20%20%20%20%20configuration.setMapUnderscoreToCamelCase(true)%3B%0A" quality="high" allowscriptaccess="always" type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" width="14" height="15"> [ 收藏代码

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  1. Configuration configuration = new Configuration(environment);
  2. configuration.setLazyLoadingEnabled(true);
  3. // 启用下划线与驼峰式命名规则的映射(如first_name => firstName)
  4. configuration.setMapUnderscoreToCamelCase(true);

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