1 所需的jar包

　　mysql驅動包：mysql-connector-java

　　資料庫連結池：druid

　　mybatis對應jar包：mybatis-spring-boot-starter

　　分頁查詢對應jar包：pagehelper

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>cn.springBoot</groupId>
    <artifactId>springBootProject</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springBootProject</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.8.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.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>

        <!--mysql驅動-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <!--jpa，類似於連線池-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-freemarker</artifactId>
        </dependency>

        <!--mybatis相關-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!-- alibaba的druid資料庫連線池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.11</version>
        </dependency>
        <!--分頁查詢相關-->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.1.1</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>

                <dependencies>
                    <!-- spring熱部署-->
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>springloaded</artifactId>
                        <version>1.2.6.RELEASE</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>


</project>

2 在資料庫中建立一個表並在後臺的實體層建立一個與之對應的實體類

package cn.springBoot.springBootProject.entity.test;

/**
 * Teacher實體類
 */
public class Teacher {
    private Integer id;
    private String name;
    private String password;

    public Teacher() {
    }

    public Teacher(Integer id, String name, String password) {
        this.id = id;
        this.name = name;
        this.password = password;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "Teacher{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

3 建立一個持久層介面

package cn.springBoot.springBootProject.dao.test;

import cn.springBoot.springBootProject.entity.test.Teacher;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * Teacher實體類對應的持久層介面
 */
@Repository
public interface TeacherMapper {
    @Select("select * from sb_teacher")
    @Results({
            @Result(property = "id", column = "id"),
            @Result(property = "name", column = "name"),
            @Result(property = "password", column = "password")
    })
    List<Teacher> findAllTeacher();
}

4 在配置檔案中配置資料庫連結資訊

# 服務配置
server:
  context-path: /devProject
  port: 88

# 資料庫配置
spring:
#  datasource: # 配置資料庫連線資訊(利用預設的資料庫連結池)
#    driver-class-name: com.mysql.jdbc.Driver
#    url: jdbc:mysql://127.0.0.1:3306/springboot?useUnicode=true&characterEncoding=utf-8
#    username: dev
#    password: 182838

  datasource: # 配置資料庫連結資訊（利用阿里巴巴提供的資料庫連線池）
      name: test
      url: jdbc:mysql://127.0.0.1:3306/springboot
      username: dev
      password: 182838
      # 使用druid資料來源
      type: com.alibaba.druid.pool.DruidDataSource
      driver-class-name: com.mysql.jdbc.Driver
      filters: stat
      maxActive: 20
      initialSize: 1
      maxWait: 60000
      minIdle: 1
      timeBetweenEvictionRunsMillis: 60000
      minEvictableIdleTimeMillis: 300000
      validationQuery: select 'x'
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      poolPreparedStatements: true
      maxOpenPreparedStatements: 20

  jpa: # 配置JPA
    hibernate:
      ddl-auto: update
    show-sql: true

# 上傳檔案配置
  http:
    multipart: # 配置檔案上傳大小
      max-file-size: 50Mb
      max-request-size: 50Mb

# 日誌配置
logging:
  level:
    root: INFO
    org:
#      springframework:
#        web: DEBUG
      hibernate: ERROR
  file: e:\\demo\\demo.log

mybatis:
  mapper-locations: classpath:mapper/*Mapper.xml

5 在啟動中新增mapper類掃描路徑

6 在dao層的介面中操作資料庫，服務層呼叫dao層的相關方法去實現資料庫操作

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