springboot整合mybatis

3、springboot整合mybatis

首先新建一个项目，勾选上我们需要的

1、springboot配置数据库连接池druid

druid学习地址

https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter

相关pom依赖
druid所需pom依赖

  <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.1.10</version>
    </dependency>
</dependencies>

解决没有@aspect注解的问题

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aspects</artifactId>
</dependency>

配置application.yml
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:

        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/tb_226?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
        username: root
        password: 123
        druid:

          initial-size: 5
          min-idle: 5
          max-active: 20

          max-wait: 60000

          time-between-eviction-runs-millis: 60000

          min-evictable-idle-time-millis: 30000
          validation-query: SELECT 1 FROM DUAL
          test-while-idle: true
          test-on-borrow: true
          test-on-return: false

          pool-prepared-statements: true
          max-pool-prepared-statement-per-connection-size: 20

          filter:
            stat:
              merge-sql: true
              slow-sql-millis: 5000

          web-stat-filter:
            enabled: true
            url-pattern: /*

            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

            login-username: admin
            login-password: admin
            allow: 127.0.0.1
pagehelper:
        helperDialect: mysql
        reasonable: true
        supportMethodsArguments: true
        params: count=countSql

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

后台代码

package com.hc.springboot02.controller;

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

/**
 * @author 胡聪
 * @site www.hc.com
 * @company
 * @create 2019-11-27 16:55
 */
@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";
    }

}

springboot整合druid成功截图
启动SpringBoot项目访问druid
首先登录

用户名和密码是在，application.yml里面

登录进来，我们看到是一个的界面，接下来我们可以查看我们请求了那个URL

现在它是没有的，接下来我们请求一下

在请求一次

2、springboot整合mybatis

springboot整合mybatis逆向生成插件
相关pom依赖

<!--更改springboot中的mysql版本，逆向生成不兼容高版本-->
<mysql.version>5.1.44</mysql.version>

<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>${mysql.version}</version>
    <scope>runtime</scope>
</dependency>

<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>

<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>

逆向生成配置文件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="E:\\Maven\\mvn_repository\\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.thf.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.thf.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.thf.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="t_mvc_book" domainObjectName="Book"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>

    </context>
</generatorConfiguration>

然后配置一下

导入jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/t226-thf?useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123

Springboot2Application.java(重点配置文件，之前的配置文件都在这）

package com.thf.springboot02;

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

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

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

}

测试一下springboot整合mybatis
BookService

package com.thf.springboot02.service;

import com.thf.springboot02.entity.Book;
import com.thf.springboot02.utils.PageBean;
import org.apache.catalina.startup.Tomcat;

import java.util.List;

/**
 * @author tanhaifang
 * @site www.thf.com
 * @company
 * @create 2019-11-26 17:15
 */
public interface BookService {
    int deleteByPrimaryKey(Integer bid);

    Book selectByPrimaryKey(Integer bid);

}

BookServiceImpl

package com.thf.springboot02.service.impl;

import com.thf.springboot02.entity.Book;
import com.thf.springboot02.mapper.BookMapper;
import com.thf.springboot02.service.BookService;
import com.thf.springboot02.utils.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @author tanhaifang
 * @site www.thf.com
 * @company
 * @create 2019-11-26 17:35
 */
@Service
public class BookServiceImpl implements BookService {
    @Autowired
    private BookMapper bookMapper;
    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public Book selectByPrimaryKey(Integer bid) {

        return bookMapper.selectByPrimaryKey(bid);
    }


}

测试类
这里我们不需要像Maven那样要继承，我们这里只需要一个注解（@SpringBootTest）

package com.thf.springboot02.service.impl;


import com.thf.springboot02.entity.Book;
import com.thf.springboot02.service.BookService;
import com.thf.springboot02.utils.PageBean;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;


@SpringBootTest
public class BookServiceImplTest {
   @Autowired
   private BookService bookService;

    @Test
    public void deleteByPrimaryKey() {
        System.out.println(bookService.deleteByPrimaryKey(21));
    }
    
    @Test
    public void selectByPrimaryKey() {
        System.out.println(bookService.selectByPrimaryKey(21));
    }
}

3、springboot整合pagehelper

分页查询
导入相关依赖

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

配置application.yml文件

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

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

BookService.java

 List<Book> listPager(Book book);

BookMapper.xml

<select id="listPager" resultType="com.thf.springboot02.entity.Book" parameterType="com.thf.springboot02.entity.Book" >
    select
    <include refid="Base_Column_List" />
    from t_mvc_book
   <where>
     <if test="bname !=null and bname !=''">
       and bname like #{bname}
     </if>
   </where>
  </select>

BookServiceImpl.java

  List<Book> listPager(Book book, PageBean pageBean);

BookServiceImpl

   @Override
    public List<Book> listPager(Book book, PageBean pageBean) {
        return bookMapper.listPager(book);
    }

**我这边直接测试一个查询：
附带条件（圣墟）
**

package com.thf.springboot02.service.impl;


import com.thf.springboot02.entity.Book;
import com.thf.springboot02.service.BookService;
import com.thf.springboot02.utils.PageBean;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;


@SpringBootTest
public class BookServiceImplTest {
   @Autowired
   private BookService bookService;

    @Test
    public void deleteByPrimaryKey() {
        System.out.println(bookService.deleteByPrimaryKey(21));
    }
    @Test
    public void listPager() {
        Book book=new Book();
        book.setBname("%圣墟%");
        PageBean pageBean=new PageBean();
        pageBean.setPage(2);
        for (Book book1 : bookService.listPager(book, pageBean)) {
            System.out.println(book1);
        }
    }

    @Test
    public void selectByPrimaryKey() {
        System.out.println(bookService.selectByPrimaryKey(21));
    }
}

结果：