前言

项目组要搭建一个xxx的后台管理系统
技术选型：
项目：Spring Boot
数据库连接池：Druid
数据库：Oracle或者mysql
JS：VueJS
Html和CSS：Boostrap

一、搭建Spring Boot框架

step1
https://start.spring.io/ 进入此URL，在左边两栏配置自己的GroupID和ArtifactID，在右边栏配置自己需要的一些maven依赖，如web，mysql connector等。点击Generate Project下载配置好的项目zip包。

start
step2
如果你使用idea或者eclipse（需要安装spring boot插件）也可以快速生成一个项目，idea如下图
start
step3
由于项目比较简单，并发量不大，直接使用界面的mybatis generator 去https://github.com/zouzg/mybatis-generator-gui.git clone下来，maven编译后启动，连接你的数据库就可以使用它来快速生成dao层和mapper文件及model了。
generator
step4
数据库dao层，model，mappers文件都已经生成完了，我们应该连接一下数据库试试了，Druid数据库配置如下：

# 数据库访问配置
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.driver-class-name=oracle.jdbc.driver.OracleDriver
spring.datasource.url=jdbc:oracle:thin:@ip:port:oratest
spring.datasource.username=xxx
spring.datasource.password=xxx
# 下面为连接池的补充设置，应用到上面所有数据源中
spring.datasource.initialSize=5
spring.datasource.minIdle=5
spring.datasource.maxActive=20
# 配置获取连接等待超时的时间
spring.datasource.maxWait=60000
# 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
spring.datasource.timeBetweenEvictionRunsMillis=60000
# 配置一个连接在池中最小生存的时间，单位是毫秒
spring.datasource.minEvictableIdleTimeMillis=300000
spring.datasource.validationQuery=SELECT 1 FROM DUAL
spring.datasource.testWhileIdle=true
spring.datasource.testOnBorrow=false
spring.datasource.testOnReturn=false
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
spring.datasource.filters=stat,wall,log4j
spring.datasource.logSlowSql=true
#这里注意增加一个mappers文件的位置，不然会报错
mybatis.mapperLocations=classpath*:mappers/*.xml 

光有上面的配置还不行，还需要一个configuration配置，configuration相当于xml文件里面的bean配置，创建的时候直接复制粘贴就行了

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
import java.sql.SQLException;
@Configuration
public class DruidConfig {
    private Logger logger = LoggerFactory.getLogger(DruidConfig.class);
    @Value("${spring.datasource.url}")
    private String dbUrl;
    @Value("${spring.datasource.username}")
    private String username;
    @Value("${spring.datasource.password}")
    private String password;
    @Value("${spring.datasource.driver-class-name}")
    private String driverClassName;
    @Value("${spring.datasource.initialSize}")
    private int initialSize;
    @Value("${spring.datasource.minIdle}")
    private int minIdle;
    @Value("${spring.datasource.maxActive}")
    private int maxActive;
    @Value("${spring.datasource.maxWait}")
    private int maxWait;
    @Value("${spring.datasource.timeBetweenEvictionRunsMillis}")
    private int timeBetweenEvictionRunsMillis;
    @Value("${spring.datasource.minEvictableIdleTimeMillis}")
    private int minEvictableIdleTimeMillis;
    @Value("${spring.datasource.validationQuery}")
    private String validationQuery;
    @Value("${spring.datasource.testWhileIdle}")
    private boolean testWhileIdle;
    @Value("${spring.datasource.testOnBorrow}")
    private boolean testOnBorrow;
    @Value("${spring.datasource.testOnReturn}")
    private boolean testOnReturn;
    @Value("${spring.datasource.filters}")
    private String filters;
    @Value("${spring.datasource.logSlowSql}")
    private String logSlowSql;
    @Bean
    public ServletRegistrationBean druidServlet() {
        ServletRegistrationBean reg = new ServletRegistrationBean();
        reg.setServlet(new StatViewServlet());
        reg.addUrlMappings("/druid/*");
        reg.addInitParameter("loginUsername", username);
        reg.addInitParameter("loginPassword", password);
        reg.addInitParameter("logSlowSql", logSlowSql);
        return reg;
    }
    @Bean
    public FilterRegistrationBean filterRegistrationBean() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new WebStatFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.addInitParameter("exclusions", "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*");
        filterRegistrationBean.addInitParameter("profileEnable", "true");
        return filterRegistrationBean;
    }
    @Bean
    public DataSource druidDataSource() {
        DruidDataSource datasource = new DruidDataSource();
        datasource.setUrl(dbUrl);
        datasource.setUsername(username);
        datasource.setPassword(password);
        datasource.setDriverClassName(driverClassName);
        datasource.setInitialSize(initialSize);
        datasource.setMinIdle(minIdle);
        datasource.setMaxActive(maxActive);
        datasource.setMaxWait(maxWait);
        datasource.setTimeBetweenEvictionRunsMillis(timeBetweenEvictionRunsMillis);
        datasource.setMinEvictableIdleTimeMillis(minEvictableIdleTimeMillis);
        datasource.setValidationQuery(validationQuery);
        datasource.setTestWhileIdle(testWhileIdle);
        datasource.setTestOnBorrow(testOnBorrow);
        datasource.setTestOnReturn(testOnReturn);
        try {
            datasource.setFilters(filters);
        } catch (SQLException e) {
            logger.error("druid configuration initialization filter", e);
        }
        return datasource;
    }

}

不出意外你上面的configuration应该会飘红，因为你没有配置pom文件的依赖。把下面的依赖引入进去，如果你使用的是mysql的connector，就引入mysql的依赖

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.5</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!--下面是oracle的连接器-->
        <dependency>
            <groupId>com.oracle</groupId>
            <artifactId>ojdbc6</artifactId>
            <version>12.1.0.1-atlassian-hosted</version>
            <exclusions>
                <exclusion>
                    <groupId>cglib</groupId>
                    <artifactId>cglib</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--下面是mysql的连接器-->
        <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>

以为上面配置结束就可以开心的马骝了？NONONO！还有个坑呢，主文件里需要添加@MapperScan，参数为你dao接口的路径，否则就会报bean的相关异常哦！

@MapperScan("com.netease.paygateway.dao")
@SpringBootApplication
public class PaygatewayApplication {

    public static void main(String[] args) {
        SpringApplication.run(PaygatewayApplication.class, args);
    }
}

step4
写一个Junit测试类测一测，在main目录的兄弟目录test下创建一个测试类，也可以在某个dao类直接使用ctrl+shift+T（idea），在类上右键新建junit（eclipse）。注意添加两个注解，@SpringBootTest里面的注解就是你的主类Application。

@RunWith(SpringRunner.class)
@SpringBootTest(classes = PaygatewayApplication.class)
public class ChargeServiceTest {

    @Autowired
    ChargeDAO chargeDAO;

    @Test
    public void getChargeVOList() {
        ChargeVOExample example = new ChargeVOExample();
        example.createCriteria().andChargeIdEqualTo("2018052415GCR30503164");
        List<ChargeVO> result = chargeDAO.selectByExample(example);
        System.out.println(result);
    }
}

待补充、、、