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
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>
配置application.yml
spring:
datasource:
#1.JDBC
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/book?useUnicode=true&characterEncoding=utf8
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
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/
用户名和密码在配置里面
成功登陆会出现该界面
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:\repository\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.hmc.springboot02.model"
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.hmc.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.hmc.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">-->
<!--<!– 忽略列，不生成bean 字段 –>-->
<!--<!– <ignoreColumn column="FRED" /> –>-->
<!--<!– 指定列的java数据类型 –>-->
<!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>-->
<!--</table>-->
<!--<table schema="" tableName="t_mvc_book" domainObjectName="MvcBook"
enableCountByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" enableUpdateByExample="false">
<!– 忽略列，不生成bean 字段 –>
<!– <ignoreColumn column="FRED" /> –>
<!– 指定列的java数据类型 –>
<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>
</table>-->
</context>
</generatorConfiguration>
逆向生成集成到maven中的命令
springboot整合mybatis
使用@Repository注解，在启动类中添加@MapperScan(“xxxx”)注解，用于扫描Mapper类的包。扫描多个包：@MapperScan({”com.javaxl.springboot02.dao”,”com.javaxl.springboot02.entity”})
//启用事物管理器
@EnableTransactionManagement
package com.hmc.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;
@SpringBootApplication
//开启Maooer自动扫描
@MapperScan("com.hmc.*.mapper")
//开启事务管理器
@EnableTransactionManagement
////开启动态代理
@EnableAspectJAutoProxy
public class Springboot02Application {
public static void main(String[] args) {
SpringApplication.run(Springboot02Application.class, args);
}
}
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插件
pagehelper:
helperDialect: mysql
reasonable: true
supportMethodsArguments: true
params: count=countSql
PagerAspect.java
package com.hmc.springboot02.util;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
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;
@Component
@Aspect
public class PageAspect {
@Around("execution(* *..*Service.*Pager(..))")
public Object invoke(ProceedingJoinPoint args) throws Throwable{
Object[] params = args.getArgs();
PageBean pageBean=null;
for (Object param : params) {
if(param instanceof PageBean){
pageBean=(PageBean) param;
break;
}
}
if(null!=pageBean&&pageBean.isPagination())
PageHelper.startPage(pageBean.getPage(),pageBean.getRows());
Object result = args.proceed(params);
if(null!=pageBean&&pageBean.isPagination()){
List lst=(List)result;
PageInfo pageInfo=new PageInfo(lst);
pageBean.setTotal(pageInfo.getTotal()+"");
}
return result;
}
}
MvcBookMapper
package com.hmc.springboot02.mapper;
import com.hmc.springboot02.model.MvcBook;
import org.springframework.stereotype.Repository;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.List;
@Repository
public interface MvcBookMapper {
/**
* 分页查询书本信息
* @param mvcBook
* @return
*/
List<MvcBook> queryBookPager(MvcBook mvcBook);
MvcBook queryMvcbook(Integer id);
}
MvcBookMapper.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.hmc.springboot02.mapper.MvcBookMapper" >
<resultMap id="BaseResultMap" type="com.hmc.springboot02.model.MvcBook" >
<constructor >
<arg 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" />
<arg column="image" jdbcType="VARCHAR" javaType="java.lang.String" />
</constructor>
</resultMap>
<select id="queryBookPager" resultType="com.hmc.springboot02.model.MvcBook"
parameterType="com.hmc.springboot02.model.MvcBook">
select * from t_mvc_book where 1=1
<if test="null!=bname and ''!=bname">
and bname like concat(concat('%',#{bname}),'%')
</if>
</select>
<select id="queryMvcbook" resultType="com.hmc.springboot02.model.MvcBook">
SELECT * from t_mvc_book where bid=#{id}
</select>
</mapper>
IMvcBookService
package com.hmc.springboot02.service;
import com.hmc.springboot02.model.MvcBook;
import com.hmc.springboot02.util.PageBean;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import java.util.List;
public interface IMvcBookService {
/**
* 分页查询书本信息
* @param mvcBook
* @return
*/
@Transactional(readOnly = true)
List<MvcBook> queryBookPager(MvcBook mvcBook, PageBean PageBean);
MvcBook queryMvcbook(Integer id);
void clear();
}
MvcBookServiceImpl
package com.hmc.springboot02.service.impl;
import com.hmc.springboot02.mapper.MvcBookMapper;
import com.hmc.springboot02.model.MvcBook;
import com.hmc.springboot02.service.IMvcBookService;
import com.hmc.springboot02.util.PageBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.CachePut;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import java.util.List;
/**
* @author胡明财
* @site www.xiaomage.com
* @company xxx公司
* @create 2019-11-24 20:38
*/
@Service
public class MvcBookServiceImpl implements IMvcBookService {
@Autowired
private MvcBookMapper MvcBookMapper;
@Override
public List<MvcBook> queryBookPager(MvcBook mvcBook, PageBean PageBean) {
return MvcBookMapper.queryBookPager(mvcBook);
}
@Override
public MvcBook queryMvcbook(Integer id) {
return MvcBookMapper.queryMvcbook(id);
}
}
测试代码如下
package com.hmc.springboot02.service.impl;
import com.hmc.springboot02.Springboot02Application;
import com.hmc.springboot02.model.MvcBook;
import com.hmc.springboot02.service.IMvcBookService;
import com.hmc.springboot02.util.PageBean;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.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;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author胡明财
* @site www.xiaomage.com
* @company xxx公司
* @create 2019-11-24 21:12
*/
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes ={Springboot02Application.class})
class MvcBookServiceImplTest {
@Autowired
private IMvcBookService IMvcBookService;
private MvcBook MvcBook;
@BeforeEach
void setUp() {
MvcBook=new MvcBook();
}
@Test
void queryBookPager() {
PageBean pageBean=new PageBean();
List<MvcBook> mvcBooks = IMvcBookService.queryBookPager(MvcBook, pageBean);
for (MvcBook mvcBook : mvcBooks) {
System.out.println(mvcBook);
}
}
@Test
void queryBook() {
MvcBook mvcBook = IMvcBookService.queryMvcbook(568);
System.out.println(mvcBook);
}
@Test
void queryBoo() {
IMvcBookService.clear();
}
}
开始测试
测试单个
