Mybatis+logback的应用配置以及第一个查询demo的实现

为了方便理解各个配置文件里的路径，前面我先把目录结构贴出来
这里写图片描述
下面开始各个文件的配置：

1.pom文件配置

dependencies内引入以下所有库

    <properties>
        <swagger.version>2.6.1</swagger.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>${swagger.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.12</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.31</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>RELEASE</version>
        </dependency>
        <!--html解析工具 -->
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.11.2</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20180130</version>
        </dependency>

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.5</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.4.6</version>
        </dependency>
    </dependencies>

2.配置application.yml文件

resources目录下新建application.yml文件

server:
  port: 9528   //访问端口号

logging:
  path: logs
  file: mylog.log

spring:
  application:
    name: myTest
  datasource:
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/myBatisTest  //提前准备好的mysql数据库地址
    username: root
    password: 123456

mybatis:
  type-aliases-package: com.course.model
  mapper-locations:
    - mapper/*

3.配置logback.xml文件

resources目录下新建logback.xml文件，文件内容为固定模板，也可自行在网上搜索模板文件。

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

    <include resource="org/springframework/boot/logging/logback/defaults.xml"/>
    <property name="FILE_LOG_PATTERN" value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{80} - %msg%n"/>
    <property name="LOG_PATH" value="${LOG_PATH:-${LOG_TEMP:-${java.io.tmpdir:-/tmp}}}"/>
    <appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${LOG_PATH}/${LOG_FILE}</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_PATH}/${LOG_FILE}.%d{yyyy-MM-dd}</fileNamePattern>
        </rollingPolicy>
        <encoder charset="UTF-8">
            <pattern>${FILE_LOG_PATTERN}</pattern>
        </encoder>
    </appender>


    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>${FILE_LOG_PATTERN}</pattern>
        </encoder>
    </appender>


    <appender name="CRAWLER_LOG" class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${LOG_PATH}/event.log</file>
        <rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${LOG_PATH}/event.%d{yyyy-MM-dd}.log</fileNamePattern>
            <maxHistory>30</maxHistory>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <pattern>%msg%n</pattern>
        </encoder>
    </appender>


    <logger name="com.business.intelligence.util.CrawlerLogger" level="INFO" additivity="false">
        <appender-ref ref="CRAWLER_LOG"/>
    </logger>

    <root level="INFO">
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="FILE"/>
    </root>


</configuration>

4.配置mybatis.xml文件

resources目录下新建mybatis.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <typeAliases>
        <package name="com.course.model"/>
    </typeAliases>
    <mappers>
        <mapper resource="mapper/mysql.xml"/>
    </mappers>
</configuration>

5.配置mysql.xml文件

resources目录下新建mapper文件夹，再新建mysql.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.course">
    <select id="getUserCount" resultType="Integer">
        select count(*) from user;    //这是最终要执行的sql语句
    </select>
</mapper>

6.配置Application文件

main/java目录下新建com.course.controller文件，com.course目录下新建Application类

@EnableScheduling
@SpringBootApplication
public class Application {

    private static ConfigurableApplicationContext context;

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

    @PreDestroy
    public  void close(){
        Application.context.close();
    }
}

7.配置Demo文件

com.course.controller目录下新建Demo类

@RestController
@Api(value = "v1",description = "这是第一个版本的demo")
@RequestMapping("v1")
public class Demo {

    //首先获取一个执行sql语句的对象
    @Autowired
    private SqlSessionTemplate template;

    @RequestMapping(value = "/getUserCount",method = RequestMethod.GET)
    @ApiOperation(value = "可以获取到用户数",httpMethod = "GET")
    public int getUserCount(){
       return template.selectOne("getUserCount");

    }

}

到这里，配置部分就全部结束了，然后Run一下Application文件。
在此之前，我已经在本地配置过一个myBatisTest库，在user表内插入了3条数据。所以执行Application文件后，最终会执行mysql.xml内的”select count(*) from user”查询语句，结果应该返回3
这里写图片描述
通过浏览器访问http://localhost:9528/v1/getUserCount（9528为application内配置的端口号，”/v1”和”/getUserCount”为Demo内配置的路径），可以看到返回结果”3”。