教新手如何整合Mybatis+SpringBoot，避免掉進坑！內涵源碼

適合新手的有關Mybatis+SpringBoot整合的超詳細步驟

廢話不多說，直接進入正題吧。
第一部分： 此次項目使用環境及工具：

• IDEA
• Navicate
• 數據庫爲MySQL
• JDK1.8.0

第二部分 詳細步驟
1 打開IDEA 創建工程，選擇如下：

2 點擊next ，選擇如下：

3 繼續next 注意 在web那裏，必須得勾選Web

4點擊next，然後點擊finish。至此基本項目框架已搭建好，接下來就是配置配置操作，以及要注意的坑。下面爲所需依賴的pom文件：複製下來就可以用
注意：下面這段內容根據自己的項目名而變

groupId>com.yafeng</groupId>
    <artifactId>training</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

---

<?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>com.yafeng</groupId>
    <artifactId>training</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>training</name>
    <description>Demo project for Spring Boot</description>
    <parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.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.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
        </dependency>
        <!--添加緩存支持-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
        <!--添加Redis緩存技術-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-redis</artifactId>
            <version>1.4.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.4</version>
        </dependency>


        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-joda</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/javax.servlet.jsp.jstl/jstl -->
        <dependency>
            <groupId>org.apache.taglibs</groupId>
            <artifactId>taglibs-standard-spec</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.taglibs</groupId>
            <artifactId>taglibs-standard-impl</artifactId>
            <version>1.2.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.module</groupId>
            <artifactId>jackson-module-parameter-names</artifactId>
        </dependency>
        <!-- 分頁插件 -->
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.5</version>
        </dependency>
        <!-- alibaba的druid數據庫連接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.9</version>
        </dependency>
    </dependencies>

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

當你這樣去跑項目時肯定是跑不起來的，因爲此時你僅僅是添加了相應的依賴，但並沒有真正的數據源，所以要跑起來還得在主程序上面添加註解：@SpringBootApplication(DataSourceAutoConfiguration.class) 否則報如下異常
Description:
Failed to auto-configure a DataSource: ‘spring.datasource.url’ is not specified and no embedded datasource could be auto-configured.
Reason: Failed to determine a suitable driver class
Action:
Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active)
此時運行基本就能成功，否則就再進行如下修改，一般新版的IDEA都不需要改

當然這僅僅是一個空項目，能運行僅僅說明環境搭建成功，要進一步開發還得配置Mybatis。所需要的.yml配置文件內容如下：

server:
  port: 8080


spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    #druid相關配置
    druid:
      #監控統計攔截的filters
      filters: stat
      driver-class-name: com.mysql.jdbc.Driver
      #基本屬性
      url: jdbc:mysql://127.0.0.1:3306/vacation?useSSL=false&useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true
      username: root
      password: 123456
      #配置初始化大小/最小/最大
      initial-size: 1
      min-idle: 1
      max-active: 20
      #獲取連接等待超時時間
      max-wait: 60000
      #間隔多久進行一次檢測，檢測需要關閉的空閒連接
      time-between-eviction-runs-millis: 60000
      #一個連接在池中最小生存的時間
      min-evictable-idle-time-millis: 300000
      validation-query: SELECT 'x'
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      #打開PSCache，並指定每個連接上PSCache的大小。oracle設爲true，mysql設爲false。分庫分表較多推薦設置爲false
      pool-prepared-statements: false
      max-pool-prepared-statement-per-connection-size: 20
  mvc:
    view:
      prefix: /WEB-INF/jsp/
      suffix: .jsp



mybatis:
  mapper-locations: classpath:mapper/*.xml
  type-aliases-package: com.yafeng.training.user.model

#配置分頁插件pagehelper
pagehelper:
    helperDialect: mysql
    reasonable: true
    supportMethodsArguments: true
    params: count=countSql
    returnPageInfo: check

使用時注意修改爲自己的數據庫密碼以及數據庫。到這裏的話基本就已經配置完了，剩下的事就是開始碼代碼了。
寫此博客的目的是是記錄一下我爲期兩週的暑期實訓所遇到的各種坑，找上找下，找不出各種錯誤，一路磕磕盼盼。最終歷經艱辛終於完成了項目。下面展示部分成果圖（需要源碼的童鞋可以從我另一篇博客找）：

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好了，內容就寫到這裏，有需要源碼的，留下你的郵箱或直接下載。