Springboot整合mybatis

1、springboot配置数据库连接池druid

新建springboot项目

选择版本，不同的版本代码效果有所不同，这里我使用2.2.1版本的

若下拉框中没有的需要的版本，可以在pom.xml进行修改


为了方便使用展现Run Dashboard面板


我们需要把mysql的版本呢降低默认为8.0.18改为5.1.44


application.yml配置druid
springboot默认数据源是org.apache.tomcat.jdbc.pool.DataSource

server:
  port: 80
  servlet:
    context-path: /


spring:
  datasource:
    #1.JDBC
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
    username: root
    password: 1234
    druid:
      #2.连接池配置
      #初始化连接池的连接数量 大小，最小，最大
      initial-size: 5
      min-idle: 5
      max-active: 20
      #配置获取连接等待超时的时间
      max-wait: 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
      time-between-eviction-runs-millis: 60000
      # 配置一个连接在池中最小生存的时间，单位是毫秒
      min-evictable-idle-time-millis: 30000
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
      test-on-borrow: true
      test-on-return: false
      # 是否缓存preparedStatement，也就是PSCache  官方建议MySQL下建议关闭   个人建议如果想用SQL防火墙 建议打开
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      # 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
      filter:
        stat:
          merge-sql: true
          slow-sql-millis: 5000
      #3.基础监控配置
      web-stat-filter:
        enabled: true
        url-pattern: /*
        #设置不统计哪些URL
        exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
        session-stat-enable: true
        session-stat-max-count: 100
      stat-view-servlet:
        enabled: true
        url-pattern: /druid/*
        reset-enable: true
        #设置监控页面的登录名和密码
        login-username: admin
        login-password: admin
        #只能被本机访问
        allow: 127.0.0.1
        #deny: 192.168.1.100

     

测试：
controller层

package com.hsl.springboot02.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-12-30 09:21
 */
@RestController
@RequestMapping("/demo")
public class HelloController {

    @RequestMapping("/say1")
    public String say1(){
        return "说活1";
    }

    @RequestMapping("/say2")
    public String say2(){
        try {
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "说活2";
    }

    @RequestMapping("/say3")
    public String say3(){
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "说活3";
    }

}

查看监控平台
用户名和密码在yml文件里配置了（自定义）

2、springboot整合mybatis

整合好后我用逆向工程测试，所以需要做一些逆向工程呢个的配置
pom依赖

   <build>
        <resources>
            <!--解决mybatis-generator-maven-plugin运行时没有将XxxMapper.xml文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.xml</include>
                </includes>
            </resource>
            <!--解决mybatis-generator-maven-plugin运行时没有将jdbc.properites文件放入target文件夹的问题-->
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>*.properties</include>
                    <include>*.xml</include>
                    <include>*.yml</include>
                </includes>
            </resource>
        </resources>

        <plugins>
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <dependencies>
                    <!--使用Mybatis-generator插件不能使用太高版本的mysql驱动 -->
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>${mysql.version}</version>
                    </dependency>
                </dependencies>
                <configuration>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>

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

generatorConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd" >
<generatorConfiguration>
    <!-- 引入配置文件 -->
    <properties resource="jdbc.properties"/>

    <!--指定数据库jdbc驱动jar包的位置-->
    <classPathEntry location="D:\\initPath\\myMaven\\mysql\\mysql-connector-java\\5.1.44\\mysql-connector-java-5.1.44.jar"/>

    <!-- 一个数据库一个context -->
    <context id="infoGuardian">
        <!-- 注释 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true"/><!-- 是否取消注释 -->
            <property name="suppressDate" value="true"/> <!-- 是否生成注释代时间戳 -->
        </commentGenerator>

        <!-- jdbc连接 -->
        <jdbcConnection driverClass="${jdbc.driver}"
                        connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>

        <!-- 类型转换 -->
        <javaTypeResolver>
            <!-- 是否使用bigDecimal， false可自动转化以下类型（Long, Integer, Short, etc.） -->
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>

        <!-- 01 指定javaBean生成的位置 -->
        <!-- targetPackage：指定生成的model生成所在的包名 -->
        <!-- targetProject：指定在该项目下所在的路径  -->
        <javaModelGenerator targetPackage="com.hsl.springboot02.entity"
                            targetProject="src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
            <!-- 是否对model添加构造函数 -->
            <property name="constructorBased" value="true"/>
            <!-- 是否针对string类型的字段在set的时候进行trim调用 -->
            <property name="trimStrings" value="false"/>
            <!-- 建立的Model对象是否 不可改变  即生成的Model对象不会有 setter方法，只有构造方法 -->
            <property name="immutable" value="false"/>
        </javaModelGenerator>

        <!-- 02 指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="com.hsl.springboot02.mapper"
                         targetProject="src/main/java">
            <!-- 是否允许子包，即targetPackage.schemaName.tableName -->
            <property name="enableSubPackages" value="false"/>
        </sqlMapGenerator>

        <!-- 03 生成XxxMapper接口 -->
        <!-- type="ANNOTATEDMAPPER",生成Java Model 和基于注解的Mapper对象 -->
        <!-- type="MIXEDMAPPER",生成基于注解的Java Model 和相应的Mapper对象 -->
        <!-- type="XMLMAPPER",生成SQLMap XML文件和独立的Mapper接口 -->
        <javaClientGenerator targetPackage="com.hsl.springboot02.mapper"
                             targetProject="src/main/java" type="XMLMAPPER">
            <!-- 是否在当前路径下新加一层schema,false路径com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] -->
            <property name="enableSubPackages" value="false"/>
        </javaClientGenerator>

        <!-- 配置表信息 -->
        <!-- schema即为数据库名 -->
        <!-- tableName为对应的数据库表 -->
        <!-- domainObjectName是要生成的实体类 -->
        <!-- enable*ByExample是否生成 example类 -->
        <!--<table schema="" tableName="t_book" domainObjectName="Book"-->
        <!--enableCountByExample="false" enableDeleteByExample="false"-->
        <!--enableSelectByExample="false" enableUpdateByExample="false">-->
        <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
        <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
        <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
        <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->

        <!--<table schema="" tableName="goods" domainObjectName="Goods"-->
               <!--enableCountByExample="false" enableDeleteByExample="false"-->
               <!--enableSelectByExample="false" enableUpdateByExample="false">-->
            <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
            <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
            <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
            <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->
    <!--订单表-->
        <!--<table schema="" tableName="t_hibernate_order" domainObjectName="Order"-->
               <!--enableCountByExample="false" enableDeleteByExample="false"-->
               <!--enableSelectByExample="false" enableUpdateByExample="false">-->
            <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
            <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
            <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
            <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->
        <!--&lt;!&ndash;订单项表&ndash;&gt;-->
        <!--<table schema="" tableName="t_hibernate_order_item" domainObjectName="OrderItems"-->
               <!--enableCountByExample="false" enableDeleteByExample="false"-->
               <!--enableSelectByExample="false" enableUpdateByExample="false">-->
            <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
            <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
            <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
            <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->
        <!--&lt;!&ndash;书籍表&ndash;&gt;-->
        <!--<table schema="" tableName="t_hibernate_book" domainObjectName="HBooks"-->
               <!--enableCountByExample="false" enableDeleteByExample="false"-->
               <!--enableSelectByExample="false" enableUpdateByExample="false">-->
            <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
            <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
            <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
            <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->
        <!--&lt;!&ndash;书记类别表&ndash;&gt;-->
        <!--<table schema="" tableName="t_hibernate_category" domainObjectName="Category"-->
               <!--enableCountByExample="false" enableDeleteByExample="false"-->
               <!--enableSelectByExample="false" enableUpdateByExample="false">-->
            <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
            <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
            <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
            <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->
<!--&lt;!&ndash;书籍类别中间表&ndash;&gt;-->
        <!--<table schema="" tableName="t_hibernate_book_category" domainObjectName="HBooksCategory"-->
               <!--enableCountByExample="false" enableDeleteByExample="false"-->
               <!--enableSelectByExample="false" enableUpdateByExample="false">-->
            <!--&lt;!&ndash; 忽略列，不生成bean 字段 &ndash;&gt;-->
            <!--&lt;!&ndash; <ignoreColumn column="FRED" /> &ndash;&gt;-->
            <!--&lt;!&ndash; 指定列的java数据类型 &ndash;&gt;-->
            <!--&lt;!&ndash; <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> &ndash;&gt;-->
        <!--</table>-->
        <table schema="" tableName="t_mvc_book" domainObjectName="Books"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>


    </context>
</generatorConfiguration>

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=1234

junit包

  <junit.version>4.12</junit.version>
  
 <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <!--<scope>test</scope>-->
        </dependency>

package com.hsl.springboot02;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan("com.hsl.springboot02.mapper")
@SpringBootApplication
public class Springboot02Application {

    public static void main(String[] args) {
        SpringApplication.run(Springboot02Application.class, args);
    }

}

Springboot02Application
@MapperScan("com.hsl.springboot02.mapper")

package com.hsl.springboot02;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan("com.hsl.springboot02.mapper")
@SpringBootApplication
public class Springboot02Application {

    public static void main(String[] args) {
        SpringApplication.run(Springboot02Application.class, args);
    }

}

测试：
BooksService

package com.hsl.springboot02.service;

import com.hsl.springboot02.entity.Books;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-12-30 10:09
 */
public interface BooksService {
    int deleteByPrimaryKey(Integer bid);

    Books selectByPrimaryKey(Integer bid);
}

实现类：

package com.hsl.springboot02.service.impl;

import com.hsl.springboot02.entity.Books;
import com.hsl.springboot02.mapper.BooksMapper;
import com.hsl.springboot02.service.BooksService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-12-30 10:10
 */
@Service
public class BooksServiceImpl implements BooksService {
    @Autowired
    private BooksMapper booksMapper;
    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return booksMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public Books selectByPrimaryKey(Integer bid) {
        return booksMapper.selectByPrimaryKey(bid);
    }
}

使用自带的测试类Springboot02ApplicationTests ：
@RunWith(SpringJUnit4ClassRunner.class) @SpringBootTest(classes = Springboot02Application.class)

package com.hsl.springboot02;

import com.hsl.springboot02.service.BooksService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = Springboot02Application.class)
public class Springboot02ApplicationTests {
    @Autowired
    private BooksService booksService;

    @Test
    public void del() {
        int i=booksService.deleteByPrimaryKey(5);
        if(i>0){
            System.err.println("删除成功");
        }

    }

    @Test
    public void selOne() {
        System.err.println("查询成功" + booksService.selectByPrimaryKey(5).toString());
    }

}

测试结果：

3、springboot整合pagehelper

导入pagehelper的pom依赖

<dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.3</version>
        </dependency>

yml配置

#pagehelper分页插件配置
pagehelper:
  helperDialect: mysql
  reasonable: true
  supportMethodsArguments: true
  params: count=countSql

#显示日志
logging:
  level:
    com.hsl.springboot02.mapper: debug

启动类：
开启切面动态代理@EnableAspectJAutoProxy
开启事务@EnableAspectJAutoProxy

package com.hsl.springboot02;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.EnableAspectJAutoProxy;

@MapperScan("com.hsl.springboot02.mapper")
@EnableAspectJAutoProxy
@EnableAspectJAutoProxy
@SpringBootApplication
public class Springboot02Application {

    public static void main(String[] args) {
        SpringApplication.run(Springboot02Application.class, args);
    }

}

切面类：

package com.hsl.springboot02.aspect;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.hsl.springboot02.utils.PageBean;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

import java.util.List;

/**
 * @author water
 * @site www.water.com
 * @company xxx公司
 * @create 2019-11-17 18:55
 */
@Component
@Aspect
public class PageAspect {
    @Around("execution(* *..*Service.*Pager(..))")
    public Object invoke(ProceedingJoinPoint joinPoint) throws Throwable {
        Object[] args = joinPoint.getArgs();
        PageBean pageBean=null;
        for (Object arg : args) {
            if(arg instanceof PageBean){
                pageBean=(PageBean)arg;
                break;
            }

        }
        if(pageBean!=null&& pageBean.isPagination()){
            PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
        }

        Object proceed = joinPoint.proceed(args);
        if(null!=pageBean && pageBean.isPagination()){
            PageInfo pageInfo=new PageInfo((List) proceed);
            System.out.println("-------------------"+pageInfo.getTotal());
            pageBean.setTotal(pageInfo.getTotal()+"");
        }
        return proceed;
    }
}

BooksMapper.java

 List<Books> selectBooksPager(Books book);

BooksMapper.xml

<select id="selectBooksPager" resultType="com.hsl.springboot02.entity.Books" parameterType="com.hsl.springboot02.entity.Books">
    select
    <include refid="Base_Column_List" />
    from t_mvc_book
    <where>
      <if test="bname != null and bname !=''">
        bname like concat('%',#{bname},'%')
      </if>
    </where>

  </select>

BooksService.java

List<Books> selectBooksPager(Books book, PageBean pageBean);

实现类：
BooksServiceImpl.java

 @Override
    public List<Books> selectBooksPager(Books book, PageBean pageBean) {
        return booksMapper.selectBooksPager(book);
    }

测试：

@Test
    public void selectBooksPager() {
        Books book = new Books();
        book.setBname("不死不灭");
        PageBean pageBean = new PageBean();
        pageBean.setPage(2);
        List<Books> books = booksService.selectBooksPager(book, pageBean);
        for (Books b : books) {
            System.out.println(b.toString());
        }
    }

测试结果：