目的：
1、springboot配置數據庫連接池druid
2、springboot整合mybatis
3、springboot整合pagehelper
springboot配置數據庫連接池druid
druid學習地址
https://github.com/alibaba/druid/tree/master/druid-spring-boot-starter
新建springboot項目，把要用的服務選上
導入druid相關pom依賴
<!--導入druid所需pom依賴-->
<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熱加載
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.連接池配置 #初始化連接池的連接數量 大小，最小，最大 initial-size: 5 min-idle: 5 max-active: 20 #配置獲取連接等待超時的時間 max-wait: 60000 #配置間隔多久才進行一次檢測，檢測需要關閉的空閑連接，單位是毫秒 time-between-eviction-runs-millis: 60000 # 配置一個連接在池中最小生存的時間，單位是毫秒 min-evictable-idle-time-millis: 30000 validation-query: SELECT 1 FROM DUAL test-while-idle: true test-on-borrow: true test-on-return: false # 是否緩存preparedStatement，也就是PSCache 官方建議MySQL下建議關閉 個人建議如果想用SQL防火牆 建議打開 pool-prepared-statements: true max-pool-prepared-statement-per-connection-size: 20 # 配置監控統計攔截的filters，去掉后監控界面sql無法統計，'wall'用於防火牆 filter: stat: merge-sql: true slow-sql-millis: 5000 #3.基礎監控配置 web-stat-filter: enabled: true url-pattern: /* #設置不統計哪些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 #設置監控頁面的登錄名和密碼 login-username: admin login-password: admin allow: 127.0.0.1 #deny: 192.168.1.100
pringboot整合druid成功截圖
啟動SpringBoot項目訪問druid， http://localhost:tomcat端口號/項目名稱/druid/
測試druid中url監控
創建一個測試類看看運行頁面時，有沒有檢測到url
package com.ht.springboot02.controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; /** * @author 黃大娘 * @company dogsun公司 * @create 2019-11-09 11:48 */ @RestController @RequestMapping("/dome") public class HelloController { @RequestMapping("/sc") public String test01(){ return "常記溪亭日暮，沉醉不知歸路."; } }
頁面測試成功來着，我們看看druid監視是否成功
很明顯監控到了，所以Springboot整合druid成功
springboot整合mybatis
首先相關整合需要的pom依賴必不可少
<!--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>${mysql.version}</version>
<scope>runtime</scope>
</dependency>
<resources>
<!--解決mybatis-generator-maven-plugin運行時沒有將XxxMapper.xml文件放入target文件夾的問題-->
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
<!--解決mybatis-generator-maven-plugin運行時沒有將jdbc.properites文件放入target文件夾的問題-->
<resource>
<directory>src/main/resources</directory>
<includes>
<include>*.properties</include>
<include>*.xml</include>
<include>*.yml</include>
</includes>
</resource>
</resources>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<dependencies>
<!--使用Mybatis-generator插件不能使用太高版本的mysql驅動 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${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"/>
<!--指定數據庫jdbc驅動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"/>
<!-- 一個數據庫一個context -->
<context id="infoGuardian">
<!-- 注釋 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/><!-- 是否取消注釋 -->
<property name="suppressDate" value="true"/> <!-- 是否生成注釋代時間戳 -->
</commentGenerator>
<!-- jdbc連接 -->
<jdbcConnection driverClass="${jdbc.driver}" connectionURL="${jdbc.url}" userId="${jdbc.username}" password="${jdbc.password}"/>
<!-- 類型轉換 -->
<javaTypeResolver>
<!-- 是否使用bigDecimal， false可自動轉化以下類型（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：指定在該項目下所在的路徑 -->
<javaModelGenerator targetPackage="com.ht.springboot02.entity" targetProject="src/main/java">
<!-- 是否允許子包，即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
<!-- 是否對model添加構造函數 -->
<property name="constructorBased" value="true"/>
<!-- 是否針對string類型的字段在set的時候進行trim調用 -->
<property name="trimStrings" value="false"/>
<!-- 建立的Model對象是否 不可改變 即生成的Model對象不會有 setter方法，只有構造方法 -->
<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">
<!-- 是否允許子包，即targetPackage.schemaName.tableName -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!-- 03 生成XxxMapper接口 -->
<!-- type="ANNOTATEDMAPPER",生成Java Model 和基於注解的Mapper對象 -->
<!-- type="MIXEDMAPPER",生成基於注解的Java Model 和相應的Mapper對象 -->
<!-- type="XMLMAPPER",生成SQLMap XML文件和獨立的Mapper接口 -->
<javaClientGenerator targetPackage="com.ht.springboot02.mapper" targetProject="src/main/java" type="XMLMAPPER">
<!-- 是否在當前路徑下新加一層schema,false路徑com.oop.eksp.user.model， true:com.oop.eksp.user.model.[schemaName] -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!-- 配置表信息 -->
<!-- schema即為數據庫名 -->
<!-- tableName為對應的數據庫表 -->
<!-- domainObjectName是要生成的實體類 -->
<!-- enable*ByExample是否生成 example類 -->
<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
測試查刪案例
不能忘了在啟動類中添加注解
@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
導入pom依賴
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.3</version>
</dependency>
在application.yml中引入相關配置
#pagehelper分頁插件配置 pagehelper: helperDialect: mysql reasonable: true supportMethodsArguments: true params: count=countSql #顯示日志 logging: level: com.ht.springboot02.mapper: debug
PageBean工具類
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; //頁碼
private int page = 1; //每頁顯示記錄數
private int rows = 10; //總記錄數
private int total = 0; //是否分頁
private boolean isPagination = true; //上一次的請求路徑
private String url; //獲取所有的請求參數
private Map<String, String[]> map; public PageBean() { super(); } //設置請求參數
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); } /** * 獲取分頁起始標記位置 * * @return
*/
public int getStartIndex() { //(當前頁碼-1)*顯示記錄數
return (this.getPage() - 1) * this.rows; } /** * 末頁 * * @return
*/
public int getMaxPage() { int totalpage = this.total / this.rows; if (this.total % this.rows != 0) totalpage++; return totalpage; } /** * 下一頁 * * @return
*/
public int getNextPage() { int nextPage = this.page + 1; if (this.page >= this.getMaxPage()) nextPage = this.getMaxPage(); return nextPage; } /** * 上一頁 * * @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類
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; } }
轉換格式Stringutil類
package com.ht.springboot02.util; public class StringUtil { public static String toLikeStr(String str){ return "%"+str+"%"; } }
測試
@Test public void bookPager(){ Map map = new HashMap(); map.put("bname","聖墟"); 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：
謝謝觀看！