springboot配置數據庫連接池druid
新建項目
創建完項目後,導入相關的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
springboot默認數據源是org.apache.tomcat.jdbc.pool.DataSource
spring:
datasource:
#1.JDBC
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/My?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
username: root
password: 123
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,檢測需要關閉的空閒連接,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,去掉後監控界面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
啓動SpringBoot項目訪問druid, http://localhost:tomcat端口號/項目名稱/druid/
**HelloController **
package com.Tang.springboot02.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
* @author Tang
*/
@RestController
@RequestMapping("/demo")
public class HelloController {
@RequestMapping("/say1")
public String say1(){
return "1號";
}
@RequestMapping("/say2")
public String say2(){
try {
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "2號";
}
@RequestMapping("/say3")
public String say3(){
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "3號";
}
}
springboot整合mybatis
springboot整合mybatis逆向生成插件及相關pom依賴
<!--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>
MyBatis-Spring-Boot-Starter依賴將會提供如下:
1、自動檢測現有的DataSource。
2、將創建並註冊SqlSessionFactory的實例,該實例使用SqlSessionFactoryBean將該DataSource作爲輸入進行傳遞。
3、將創建並註冊從SqlSessionFactory中獲取的SqlSessionTemplate的實例。
4、自動掃描您的mappers,將它們鏈接到SqlSessionTemplate並將其註冊到Spring上下文,以便將它們注入到您的bean中
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"/>
<!--指定數據庫jdbc驅動jar包的位置-->
<classPathEntry location="D:\\Y2\\mvn_repository\\mysql\\mysql-connector-java\\5.1.44"/>
<!-- 一個數據庫一個context -->
<context id="infoGuardian">
<!-- 註釋 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/><!-- 是否取消註釋 -->
<property name="suppressDate" value="true"/> <!-- 是否生成註釋代時間戳 -->
</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.Tang.model"
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.Tang.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 和基於註解的Mapper對象 -->
<!-- type="MIXEDMAPPER",生成基於註解的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.Tang.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即爲數據庫名 -->
<!-- tableName爲對應的數據庫表 -->
<!-- domainObjectName是要生成的實體類 -->
<!-- enable*ByExample是否生成 example類 -->
<!--<table schema="" tableName="t_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數據類型 –>-->
<!--<!– <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> –>-->
<!--</table>-->
<table schema="" tableName="t_mvc_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數據類型 -->
<!-- <columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" /> -->
</table>
</context>
</generatorConfiguration>
逆向生成集成到maven中的命令: mybatis-generator:generate -e
使用@Repository註解,在啓動類中添加@MapperScan(“xxxx”)註解,用於掃描Mapper類的包。掃描多個包:@MapperScan({”com.Tang.springboot02.dao”,”com.Tang.springboot02.entity”})
//啓用事物管理器
@EnableTransactionManagement
package com.Tang.springboot02;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@MapperScan("com.Tang.springboot02.mapper")
@SpringBootApplication
public class Springboot02Application {
public static void main(String[] args) {
SpringApplication.run(Springboot02Application.class, args);
}
}
Test
package com.Tang.springboot02;
import com.Tang.springboot02.model.Book;
import com.Tang.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(13);
}
@Test
public void selectByPrimaryKey(){
Book book = bookService.selectByPrimaryKey(13);
System.out.println(book);
}
}
springboot整合pagehelper
導入相關pom依賴
<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分頁插件配置
pagehelper:
helperDialect: mysql
reasonable: true
supportMethodsArguments: true
params: count=countSql
#顯示日誌
logging:
level:
com.Tang.springboot02.mapper: debug
mapper.java
List<Map> bookPager(Map map);
mapper.xml
<select id="bookPager" resultType="java.util.Map" parameterType="java.util.Map">
select * from t_mvc_book
<where>
<if test="bname != null">
and bname like concat ('%',#{bname},'%')
</if>
</where>
</select>
PagerAspect.java
@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;
}
}
service層
@Override
public List<Map> bookPager(Map map, PageBean pageBean) {
return bookMapper.bookPager(map);
}
springboot啓動類
package com.Tang.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;
@MapperScan("com.Tang.springboot02.mapper")
@EnableTransactionManagement
@EnableAspectJAutoProxy
@SpringBootApplication
public class Springboot02Application {
public static void main(String[] args) {
SpringApplication.run(Springboot02Application.class, args);
}
}
Test
@Test
public void bookPager(){
Map map = new HashMap();
map.put("bname","聖墟");
PageBean pageBean = new PageBean();
pageBean.setPage(2);
List<Map> maps = this.bookService.bookPager(map, pageBean);
for (Map map1 : maps) {
System.out.println(map1);
}
System.out.println(pageBean);
}
over…