springboot整合mybatis

最新推荐文章于 2024-12-09 20:28:17 发布

邓狗胖

最新推荐文章于 2024-12-09 20:28:17 发布

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本文链接：https://blog.youkuaiyun.com/weixin_45180919/article/details/103261717

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本文详细介绍了如何在SpringBoot项目中整合数据库连接池Druid、ORM框架MyBatis以及分页插件PageHelper，包括配置步骤、依赖添加及测试验证。

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目标
1、springboot配置数据库连接池druid
2、springboot整合mybatis
3、springboot整合pagehelper
springboot配置数据库连接池druid
新建springboot项目
在这里插入图片描述
druid学习地址
druid所需pom依赖

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

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

配置application.yml

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/mysql?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
    username: root
    password: 123
    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
        allow: 127.0.0.1
        #deny: 192.168.1.100

测试类

package com.liuyujian.springboot02.Controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@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， http://localhost:tomcat端口号/项目名称/druid/
在这里插入图片描述
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="D:\jdk\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.liuyujian.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.liuyujian.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.liuyujian.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_mvc_book" domainObjectName="Book"
               enableCountByExample="false" enableDeleteByExample="false"
               enableSelectByExample="false" enableUpdateByExample="false">
        </table>


    </context>
</generatorConfiguration>

BookMeeper

package com.liuyujian.springboot02.mapper;

import com.liuyujian.springboot02.entity.Book;
import com.liuyujian.springboot02.utitls.PageBean;

import java.util.List;

public interface BookMapper {
    int deleteByPrimaryKey(Integer bid);

    int insert(Book record);

    int insertSelective(Book record);

    Book selectByPrimaryKey(Integer bid);

    int updateByPrimaryKeySelective(Book record);

    int updateByPrimaryKey(Book record);

    List<Book> queryBooksPager(Book book);
}

BookMeeper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="com.liuyujian.springboot02.mapper.BookMapper" >
  <resultMap id="BaseResultMap" type="com.liuyujian.springboot02.entity.Book" >
    <constructor >
      <idArg column="bid" jdbcType="INTEGER" javaType="java.lang.Integer" />
      <arg column="bname" jdbcType="VARCHAR" javaType="java.lang.String" />
      <arg column="price" jdbcType="REAL" javaType="java.lang.Float" />
    </constructor>
  </resultMap>
  <sql id="Base_Column_List" >
    bid, bname, price
  </sql>
  <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
    select 
    <include refid="Base_Column_List" />
    from t_mvc_book
    where bid = #{bid,jdbcType=INTEGER}
  </select>
  <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
    delete from t_mvc_book
    where bid = #{bid,jdbcType=INTEGER}
  </delete>
  <insert id="insert" parameterType="com.liuyujian.springboot02.entity.Book" >
    insert into t_mvc_book (bid, bname, price
      )
    values (#{bid,jdbcType=INTEGER}, #{bname,jdbcType=VARCHAR}, #{price,jdbcType=REAL}
      )
  </insert>
  <insert id="insertSelective" parameterType="com.liuyujian.springboot02.entity.Book" >
    insert into t_mvc_book
    <trim prefix="(" suffix=")" suffixOverrides="," >
      <if test="bid != null" >
        bid,
      </if>
      <if test="bname != null" >
        bname,
      </if>
      <if test="price != null" >
        price,
      </if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides="," >
      <if test="bid != null" >
        #{bid,jdbcType=INTEGER},
      </if>
      <if test="bname != null" >
        #{bname,jdbcType=VARCHAR},
      </if>
      <if test="price != null" >
        #{price,jdbcType=REAL},
      </if>
    </trim>
  </insert>
  <update id="updateByPrimaryKeySelective" parameterType="com.liuyujian.springboot02.entity.Book" >
    update t_mvc_book
    <set >
      <if test="bname != null" >
        bname = #{bname,jdbcType=VARCHAR},
      </if>
      <if test="price != null" >
        price = #{price,jdbcType=REAL},
      </if>
    </set>
    where bid = #{bid,jdbcType=INTEGER}
  </update>
  <update id="updateByPrimaryKey" parameterType="com.liuyujian.springboot02.entity.Book" >
    update t_mvc_book
    set bname = #{bname,jdbcType=VARCHAR},
      price = #{price,jdbcType=REAL}
    where bid = #{bid,jdbcType=INTEGER}
  </update>
  <select id="queryBooksPager" resultType="com.liuyujian.springboot02.entity.Book" parameterType="com.liuyujian.springboot02.entity.Book">
    select
    <include refid="Base_Column_List" />
    from t_mvc_book
    <where>
      <if test="bname != null and bname !=''">
        bname like #{bname}
      </if>
    </where>
  </select>
</mapper>

bookservice

package com.liuyujian.springboot02.service;

import com.liuyujian.springboot02.entity.Book;
import com.liuyujian.springboot02.utitls.PageBean;

import java.util.List;

/**
 * @author老刘飞刀
 * @site www.xiaomage.com
 * @company xxx公司
 * @create  2019-11-26 16:51
 */
public interface bookService {
    int deleteByPrimaryKey(Integer bid);

    int insert(Book record);

    int insertSelective(Book record);

    Book selectByPrimaryKey(Integer bid);

    int updateByPrimaryKeySelective(Book record);

    int updateByPrimaryKey(Book record);

bookserviceimpl

package com.liuyujian.springboot02.service.impl;

import com.liuyujian.springboot02.entity.Book;
import com.liuyujian.springboot02.mapper.BookMapper;
import com.liuyujian.springboot02.service.bookService;
import com.liuyujian.springboot02.utitls.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

/**
 * @author老刘飞刀
 * @site www.xiaomage.com
 * @company xxx公司
 * @create  2019-11-26 16:52
 */
@Service
public class bookServiceImpl implements bookService {
   @Autowired
   private BookMapper bookMapper;
    @Override
    public int deleteByPrimaryKey(Integer bid) {
        return bookMapper.deleteByPrimaryKey(bid);
    }

    @Override
    public int insert(Book record) {
        return bookMapper.insert(record);
    }

    @Override
    public int insertSelective(Book record) {
        return bookMapper.insertSelective(record);
    }

    @Override
    public Book selectByPrimaryKey(Integer bid) {
        return bookMapper.selectByPrimaryKey(bid);
    }

    @Override
    public int updateByPrimaryKeySelective(Book record) {
        return bookMapper.updateByPrimaryKeySelective(record);
    }

    @Override
    public int updateByPrimaryKey(Book record) {
        return bookMapper.updateByPrimaryKey(record);
    }
    }

测试类
bookserviceimplText

package com.liuyujian.springboot02.service.impl;



import com.liuyujian.springboot02.entity.Book;
import com.liuyujian.springboot02.service.bookService;
import com.liuyujian.springboot02.utitls.PageBean;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
/**
 * @author老刘飞刀
 * @site www.xiaomage.com
 * @company xxx公司
 * @create  2019-11-26 16:55
 */
@SpringBootTest
public class bookServiceImplTest {
    @Autowired
    private bookService bookService;
    @Test
    public void deleteByPrimaryKey() {
        System.out.println(bookService.deleteByPrimaryKey(26));

    }

    @Test
    public void selectByPrimaryKey() {
        System.out.println(bookService.selectByPrimaryKey(27));
    }
    }

在这里插入图片描述

springboot整合pagehelper
导入相关pom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

Bookmapper.java

 List<Book> queryBooksPager(Book book);

Bookmapper.xml

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

Bookservice

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

BookServiceimpl

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

BookServiceimplText

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

测试结果
在这里插入图片描述