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: epositorymvn-repositorymysqlmysql-connector-java5.1.44mysql-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
