mybatis、sql、logback等配置及数据增删改查的简单示例

数据持久层框架mybatis的应用

Mybatis和logback的应用配置

配置pom.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.5.7</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <groupId>org.example</groupId>
    <artifactId>Chapter11</artifactId>
    <version>1.0-SNAPSHOT</version>

    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>11</java.version>
        <swagger.version>2.7.0</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-starter-test</artifactId>
            <scope>test</scope>
        </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>1.18.22</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.79</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.2.1</version>
        </dependency>
    </dependencies>


</project>

配置application.yml文件

配置mysql、mybatis、log、springboot

server:
  port: 8888
logging:
  file:
    path: logs
    name: mylog.log

spring:
  application:
    name: myTest
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://123.123.123.123:3306/course
    username: ******
    password: ******

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

配置logback.xml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>

配置mybatis配置文件

<?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>

配置mysql文件

用来写sql语句

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

<mapper namespace="com.course">
    <select id="getUserCount" resultType="Integer">
        select count(*) from user;
    </select>
</mapper>

配置启动文件

package com.course;


import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.scheduling.annotation.EnableScheduling;

import javax.annotation.PreDestroy;

@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();
    }
}

测试Demo

package com.course.controller;



import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.log4j.Log4j;
import lombok.extern.log4j.Log4j2;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@Log4j2
@RestController
@Api(value = "v1",description = "这是我第一个版本的demo")
@RequestMapping(value = "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");

    }
}

mybatis-sql，增加数据

新增mysql文件

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

<mapper namespace="com.course">
    <select id="getUserCount" resultType="Integer">
        select count(*) from user;
    </select>

    <insert id="addUser" parameterType="com.course.model.User">
        insert into user(id,name,age,sex)
        values (#{id},#{name},#{age},#{sex})
    </insert>
</mapper>

新增数据结构User

package com.course.model;

import lombok.Data;

@Data
public class User {
    private int id;
    private String name;
    private int age;
    private String sex;
}

新增接口addUser

package com.course.controller;



import com.course.model.User;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.log4j.Log4j;
import lombok.extern.log4j.Log4j2;
import org.mybatis.spring.SqlSessionTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@Log4j2
@RestController
@Api(value = "v1",description = "这是我第一个版本的demo")
@RequestMapping(value = "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");

    }
    @RequestMapping(value = "addUser",method = RequestMethod.POST)
    @ApiOperation(value = "增加用户",httpMethod = "POST")
    public int addUser(@RequestBody User user){
        return template.insert("addUser",user);
    }
}

mybatis-sql,更新数据

新增mysql文件

    <update id="updateUser" parameterType="com.course.model.User">
        update user set name =#{name},age=#{age}
        where id=#{id}
    </update>

新增接口updateUser

    @RequestMapping(value = "updateUser",method = RequestMethod.POST)
    @ApiOperation(value = "更新用户",httpMethod = "POST")
    public int updateUser(@RequestBody User user){
        return template.update("updateUser",user);
    }

mybatis-sql，删除数据

新增mysql文件

    <delete id="deleteUser" parameterType="Integer">
        delete from user where id = #{id}
    </delete>

新增接口deleteUser

    @RequestMapping(value = "deleteUser",method = RequestMethod.POST)
    @ApiOperation(value = "删除用户",httpMethod = "POST")
    public int deleteUser(@RequestParam int id){
        return template.delete("deleteUser",id);
    }