增加连接池示例

lab-19/lab-19-datasource-pool-druid-multiple/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>lab-19-datasource-pool-druid-multiple</artifactId>
+
+    <dependencies>
+        <!-- 保证 Spring JDBC 的依赖健全 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <!-- 实现对 Druid 连接池的自动化配置 -->
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>druid-spring-boot-starter</artifactId>
+            <version>1.1.21</version>
+        </dependency>
+        <dependency> <!-- 本示例，我们使用 MySQL -->
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>5.1.48</version>
+        </dependency>
+
+        <!-- 实现对 Spring MVC 的自动化配置，因为我们需要看看 Druid 的监控功能 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- 方便等会写单元测试 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

lab-19/lab-19-datasource-pool-druid-multiple/src/main/java/cn/iocoder/springboot/lab19/datasourcepool/Application.java

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+package cn.iocoder.springboot.lab19.datasourcepool;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import javax.annotation.Resource;
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.sql.SQLException;
+
+@SpringBootApplication
+public class Application implements CommandLineRunner {
+
+    private Logger logger = LoggerFactory.getLogger(Application.class);
+
+    @Resource(name = "ordersDataSource")
+    private DataSource ordersDataSource;
+
+    @Resource(name = "usersDataSource")
+    private DataSource usersDataSource;
+
+    public static void main(String[] args) {
+        // 启动 Spring Boot 应用
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Override
+    public void run(String... args) {
+        // orders 数据源
+        try (Connection conn = ordersDataSource.getConnection()) {
+            // 这里，可以做点什么
+            logger.info("[run][ordersDataSource 获得连接：{}]", conn);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+
+        // users 数据源
+        try (Connection conn = usersDataSource.getConnection()) {
+            // 这里，可以做点什么
+            logger.info("[run][usersDataSource 获得连接：{}]", conn);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}

lab-19/lab-19-datasource-pool-druid-multiple/src/main/java/cn/iocoder/springboot/lab19/datasourcepool/config/DataSourceConfig.java

@@ -0,0 +1,33 @@
+package cn.iocoder.springboot.lab19.datasourcepool.config;
+
+import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+
+import javax.sql.DataSource;
+
+@Configuration
+public class DataSourceConfig {
+
+    /**
+     * 创建 orders 数据源
+     */
+    @Primary
+    @Bean(name = "ordersDataSource")
+    @ConfigurationProperties(prefix = "spring.datasource.orders") // 读取 spring.datasource.orders 配置到 HikariDataSource 对象
+    public DataSource ordersDataSource() {
+        return DruidDataSourceBuilder.create().build();
+    }
+
+    /**
+     * 创建 users 数据源
+     */
+    @Bean(name = "usersDataSource")
+    @ConfigurationProperties(prefix = "spring.datasource.users")
+    public DataSource usersDataSource() {
+        return DruidDataSourceBuilder.create().build();
+    }
+
+}

lab-19/lab-19-datasource-pool-druid-multiple/src/main/resources/application.yaml

@@ -0,0 +1,33 @@
+spring:
+  # datasource 数据源配置内容
+  datasource:
+    # 订单数据源配置
+    orders:
+      url: jdbc:mysql://127.0.0.1:3306/test_orders?useSSL=false&useUnicode=true&characterEncoding=UTF-8
+      driver-class-name: com.mysql.jdbc.Driver
+      username: root
+      password:
+      # Druid 自定义配置，对应 DruidDataSource 中的 setting 方法的属性
+      min-idle: 0 # 池中维护的最小空闲连接数，默认为 0 个。
+      max-active: 20 # 池中最大连接数，包括闲置和使用中的连接，默认为 8 个。
+    # 用户数据源配置
+    users:
+      url: jdbc:mysql://127.0.0.1:3306/test_users?useSSL=false&useUnicode=true&characterEncoding=UTF-8
+      driver-class-name: com.mysql.jdbc.Driver
+      username: root
+      password:
+      # Druid 自定义配置，对应 DruidDataSource 中的 setting 方法的属性
+      min-idle: 0 # 池中维护的最小空闲连接数，默认为 0 个。
+      max-active: 20 # 池中最大连接数，包括闲置和使用中的连接，默认为 8 个。
+    # Druid 自定已配置
+    druid:
+      # 过滤器配置
+      filter:
+        stat: # 配置 StatFilter ，对应文档 https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatFilter
+          log-slow-sql: true # 开启慢查询记录
+          slow-sql-millis: 5000 # 慢 SQL 的标准，单位：毫秒
+      # StatViewServlet 配置
+      stat-view-servlet: # 配置 StatViewServlet ，对应文档 https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatViewServlet%E9%85%8D%E7%BD%AE
+        enabled: true # 是否开启 StatViewServlet
+        login-username: yudaoyuanma # 账号
+        login-password: javaniubi # 密码

lab-19/lab-19-datasource-pool-druid-single/pom.xml

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>lab-19-datasource-pool-druid-single</artifactId>
+
+    <dependencies>
+        <!-- 保证 Spring JDBC 的依赖健全 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <!-- 实现对 Druid 连接池的自动化配置 -->
+        <dependency>
+            <groupId>com.alibaba</groupId>
+            <artifactId>druid-spring-boot-starter</artifactId>
+            <version>1.1.21</version>
+        </dependency>
+        <dependency> <!-- 本示例，我们使用 MySQL -->
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>5.1.48</version>
+        </dependency>
+
+        <!-- 实现对 Spring MVC 的自动化配置，因为我们需要看看 Druid 的监控功能 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- 方便等会写单元测试 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

lab-19/lab-19-datasource-pool-druid-single/src/main/java/cn/iocoder/springboot/lab19/datasourcepool/Application.java

@@ -0,0 +1,30 @@
+package cn.iocoder.springboot.lab19.datasourcepool;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import javax.sql.DataSource;
+
+@SpringBootApplication
+public class Application implements CommandLineRunner {
+
+    private Logger logger = LoggerFactory.getLogger(Application.class);
+
+    @Autowired
+    private DataSource dataSource;
+
+    public static void main(String[] args) {
+        // 启动 Spring Boot 应用
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Override
+    public void run(String... args) {
+        logger.info("[run][获得数据源：{}]", dataSource.getClass());
+    }
+
+}

lab-19/lab-19-datasource-pool-druid-single/src/main/java/cn/iocoder/springboot/lab19/datasourcepool/controller/DruidStatController.java

@@ -0,0 +1,18 @@
+package cn.iocoder.springboot.lab19.datasourcepool.controller;
+
+import com.alibaba.druid.stat.DruidStatManagerFacade;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class DruidStatController {
+
+    @GetMapping("/monitor/druid/stat")
+    @Deprecated
+    public Object druidStat(){
+        // `DruidStatManagerFacade#getDataSourceStatDataList()` 方法，可以获取所有数据源的监控数据。
+        // 除此之外，DruidStatManagerFacade 还提供了一些其他方法，你可以按需选择使用。
+        return DruidStatManagerFacade.getInstance().getDataSourceStatDataList();
+    }
+
+}

lab-19/lab-19-datasource-pool-druid-single/src/main/resources/application.yaml

@@ -0,0 +1,20 @@
+spring:
+  # datasource 数据源配置内容，对应 DataSourceProperties 配置属性类
+  datasource:
+    url: jdbc:mysql://127.0.0.1:3306/test?useSSL=false&useUnicode=true&characterEncoding=UTF-8
+    driver-class-name: com.mysql.jdbc.Driver
+    username: root # 数据库账号
+    password: # 数据库密码
+    type: com.alibaba.druid.pool.DruidDataSource # 设置类型为 DruidDataSource
+    # Druid 自定义配置，对应 DruidDataSource 中的 setting 方法的属性
+    druid:
+      min-idle: 0 # 池中维护的最小空闲连接数，默认为 0 个。
+      max-active: 20 # 池中最大连接数，包括闲置和使用中的连接，默认为 8 个。
+      filter:
+        stat: # 配置 StatFilter ，对应文档 https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatFilter
+          log-slow-sql: true # 开启慢查询记录
+          slow-sql-millis: 5000 # 慢 SQL 的标准，单位：毫秒
+      stat-view-servlet: # 配置 StatViewServlet ，对应文档 https://github.com/alibaba/druid/wiki/%E9%85%8D%E7%BD%AE_StatViewServlet%E9%85%8D%E7%BD%AE
+        enabled: true # 是否开启 StatViewServlet
+        login-username: yudaoyuanma # 账号
+        login-password: javaniubi # 密码

lab-19/lab-19-datasource-pool-hikaricp-multiple/pom.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.1.3.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>lab-19-datasource-pool-hikaricp-multiple</artifactId>
+
+    <dependencies>
+        <!-- 实现对数据库连接池的自动化配置 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-jdbc</artifactId>
+        </dependency>
+        <dependency> <!-- 本示例，我们使用 MySQL -->
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+            <version>5.1.48</version>
+        </dependency>
+
+        <!-- 方便等会写单元测试 -->
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+</project>

lab-19/lab-19-datasource-pool-hikaricp-multiple/src/main/java/cn/iocoder/springboot/lab19/datasourcepool/Application.java

@@ -0,0 +1,49 @@
+package cn.iocoder.springboot.lab19.datasourcepool;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.boot.CommandLineRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+import javax.annotation.Resource;
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.sql.SQLException;
+
+@SpringBootApplication
+public class Application implements CommandLineRunner {
+
+    private Logger logger = LoggerFactory.getLogger(Application.class);
+
+    @Resource(name = "ordersDataSource")
+    private DataSource ordersDataSource;
+
+    @Resource(name = "usersDataSource")
+    private DataSource usersDataSource;
+
+    public static void main(String[] args) {
+        // 启动 Spring Boot 应用
+        SpringApplication.run(Application.class, args);
+    }
+
+    @Override
+    public void run(String... args) {
+        // orders 数据源
+        try (Connection conn = ordersDataSource.getConnection()) {
+            // 这里，可以做点什么
+            logger.info("[run][ordersDataSource 获得连接：{}]", conn);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+
+        // users 数据源
+        try (Connection conn = usersDataSource.getConnection()) {
+            // 这里，可以做点什么
+            logger.info("[run][usersDataSource 获得连接：{}]", conn);
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+}