springboot - mybatis - 下划线与驼峰自动转换 mapUnderscoreToCamelCase

以前都是在mybatis.xml中来配置，但是spring boot不想再用xml配置文件。网上搜寻了好久，才找到设置办法：sessionFactoryBean.getObject().getConfiguration().setMapUnderscoreToCamelCase(true);

db配置文件源码：

package com.vip.qa.vop.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.session.SqlSessionFactory;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import javax.sql.DataSource;
import java.util.Properties;

/**
 * Created by danny.yao on 2017/10/25.
 */
@Configuration
@MapperScan(basePackages = VOPDataSourceConfig.PACKAGE, sqlSessionFactoryRef = "vopSqlSessionFactory")
public class VOPDataSourceConfig {
    static final String PACKAGE = "com.vip.qa.vop.mapper.vop";

    @Value("${vop.datasource.url}")
    private String dbUrl;

    @Value("${vop.datasource.username}")
    private String dbUser;

    @Value("${vop.datasource.password}")
    private String dbPassword;

    @Value("${vop.datasource.driver-class-name}")
    private String dbDriver;

    @Bean(name = "vopDataSource")
    @Qualifier
    @Primary
    public DataSource vopDataSource() {
        DruidDataSource dataSource = new DruidDataSource();
        dataSource.setDriverClassName(dbDriver);
        dataSource.setUrl(dbUrl);
        dataSource.setUsername(dbUser);
        dataSource.setPassword(dbPassword);
        return dataSource;
    }

    @Bean(name = "vopSqlSessionFactory")
    @Qualifier
    @Primary
    public SqlSessionFactory vopSqlSessionFactory(@Qualifier("vopDataSource") DataSource scepDataSource) throws Exception {
        final SqlSessionFactoryBean sessionFactoryBean = new SqlSessionFactoryBean();
        sessionFactoryBean.setDataSource(scepDataSource);

        PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
        sessionFactoryBean.setMapperLocations(resolver.getResources("classpath:/mybatis/vop/*.xml"));
        sessionFactoryBean.getObject().getConfiguration().setMapUnderscoreToCamelCase(true);

        return sessionFactoryBean.getObject();
    }

//    @Bean(name = "vopTransactionManager")
//    @Qualifier
//    public DataSourceTransactionManager testDataTransactionManager() {
//        return new DataSourceTransactionManager(vopDataSource());
//    }

}

参考：http://www.cnblogs.com/gods/p/4423422.html