目的：
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
druid学习地址
https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter
新建springboot项目，把要用的服务选上
导入druid相关pom依赖
<!--导入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
application.yml配置devtools热加载
spring: datasource: #1.JDBC type: com.alibaba.druid.pool.DruidDataSource driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://localhost:3306/t224?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
username: root password: root 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
pringboot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/
测试druid中url监控
创建一个测试类看看运行页面时，有没有检测到url
package com.ht.springboot02.controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; /** * @author 黄大娘 * @company dogsun公司 * @create 2019-11-09 11:48 */ @RestController @RequestMapping("/dome") public class HelloController { @RequestMapping("/sc") public String test01(){ return "常记溪亭日暮，沉醉不知归路."; } }
页面测试成功来着，我们看看druid监视是否成功
很明显监控到了，所以Springboot整合druid成功
springboot整合mybatis
首先相关整合需要的pom依赖必不可少
<!--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>
添加逆向生成文件配置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="C:\development_tool\maven_cang\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.ht.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.ht.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.ht.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">
<property name="useActualColumnNames" value="true" />
</table>
</context>
</generatorConfiguration>
jdbc.properties文件
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/t224?useUnicode=true&characterEncoding=UTF-8&nullCatalogMeansCurrent=true jdbc.username=root jdbc.password=root
逆向生成集成到maven中的命令
mybatis-generator:generate -e
测试查删案例
不能忘了在启动类中添加注解
@MapperScan("com.ht.springboot02.mapper")
Springboot02ApplicationTests
package com.ht.springboot02; import com.ht.springboot02.entity.Book; import com.ht.springboot02.service.BookService; import org.junit.jupiter.api.Test; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.test.context.SpringBootTest; @SpringBootTest class Springboot02ApplicationTests { @Autowired private BookService bookService; @Test public void deleteByPrimaryKey(){ bookService.deleteByPrimaryKey(12); } @Test public void selectByPrimaryKey(){ Book book = bookService.selectByPrimaryKey(12); System.out.println(book); } }
springboot整合pagehelper
导入pom依赖
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.3</version>
</dependency>
在application.yml中引入相关配置
#pagehelper分页插件配置 pagehelper: helperDialect: mysql reasonable: true supportMethodsArguments: true params: count=countSql #显示日志 logging: level: com.ht.springboot02.mapper: debug
PageBean工具类
package com.ht.springboot02.util; import javax.servlet.http.HttpServletRequest; import java.io.Serializable; import java.util.Map; public class PageBean implements Serializable { private static final long serialVersionUID = 2422581023658455731L; //页码
private int page = 1; //每页显示记录数
private int rows = 10; //总记录数
private int total = 0; //是否分页
private boolean isPagination = true; //上一次的请求路径
private String url; //获取所有的请求参数
private Map<String, String[]> map; public PageBean() { super(); } //设置请求参数
public void setRequest(HttpServletRequest req) { String page = req.getParameter("page"); String rows = req.getParameter("rows"); String pagination = req.getParameter("pagination"); this.setPage(page); this.setRows(rows); this.setPagination(pagination); this.url = req.getContextPath() + req.getServletPath(); this.map = req.getParameterMap(); } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public Map<String, String[]> getMap() { return map; } public void setMap(Map<String, String[]> map) { this.map = map; } public int getPage() { return page; } public void setPage(int page) { this.page = page; } public void setPage(String page) { if (null != page && !"".equals(page.trim())) this.page = Integer.parseInt(page); } public int getRows() { return rows; } public void setRows(int rows) { this.rows = rows; } public void setRows(String rows) { if (null != rows && !"".equals(rows.trim())) this.rows = Integer.parseInt(rows); } public int getTotal() { return total; } public void setTotal(int total) { this.total = total; } public void setTotal(String total) { this.total = Integer.parseInt(total); } public boolean isPagination() { return isPagination; } public void setPagination(boolean isPagination) { this.isPagination = isPagination; } public void setPagination(String isPagination) { if (null != isPagination && !"".equals(isPagination.trim())) this.isPagination = Boolean.parseBoolean(isPagination); } /** * 获取分页起始标记位置 * * @return
*/
public int getStartIndex() { //(当前页码-1)*显示记录数
return (this.getPage() - 1) * this.rows; } /** * 末页 * * @return
*/
public int getMaxPage() { int totalpage = this.total / this.rows; if (this.total % this.rows != 0) totalpage++; return totalpage; } /** * 下一页 * * @return
*/
public int getNextPage() { int nextPage = this.page + 1; if (this.page >= this.getMaxPage()) nextPage = this.getMaxPage(); return nextPage; } /** * 上一页 * * @return
*/
public int getPreivousPage() { int previousPage = this.page - 1; if (previousPage < 1) previousPage = 1; return previousPage; } @Override public String toString() { return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", isPagination=" + isPagination + "]"; } }
PagerAspect类
package com.ht.springboot02.aspcet; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.ht.springboot02.util.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; @Component @Aspect public class PagerAspect { @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 (pageBean !=null && pageBean.isPagination()) PageHelper.startPage(pageBean.getPage(),pageBean.getRows()); Object proceed = args.proceed(params); if (pageBean !=null && pageBean.isPagination()){ PageInfo pageInfo = new PageInfo((List) proceed); pageBean.setTotal(pageInfo.getTotal()+""); } return proceed; } }
转换格式Stringutil类
package com.ht.springboot02.util; public class StringUtil { public static String toLikeStr(String str){ return "%"+str+"%"; } }
测试
@Test public void bookPager(){ Map map = new HashMap(); map.put("bname","圣墟"); PageBean pageBean =new PageBean(); pageBean.setPage(5); List<Map> list = this.bookService.bookPager(map,pageBean); for (Map m : list){ System.out.println(m); } System.out.println(map); }
效果：
谢谢观看！