SpringBoot2.0+Mybatis-Plus3.0+Druid1.1.10 一站式整合

一、先快速建立一個springboot專案，其中pom.xml加入mybatis-plus 和druid需要的依賴

pom.xml

<?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"
 
>
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.kyplatform</groupId>
    <artifactId>kyplatform</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>kyplatform</name>
    <description
 
>kyplatform for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.6.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository 
 
-->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <!--<scope>compile</scope>-->
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!--mybatis-plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.0.4</version>
        </dependency>
        <!--啟動熱部署-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>
        <!-- druid-spring-boot-starter -->
<!--        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.velocity/velocity -->
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity</artifactId>
            <version>1.7</version>
        </dependency>


    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

二、編寫application.yml檔案

# DataSource Config
spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource

    # 下面為連線池的補充設定，應用到上面所有資料來源中
    # 初始化大小，最小，最大
    druid:
      driver-class-name: com.mysql.jdbc.Driver
      url: jdbc:mysql://127.0.0.1:3306/xxxxxx?characterEncoding=utf8
      username: root
      password: *******
      initialSize: 5
      minIdle: 5
      maxActive: 20
      # 配置獲取連線等待超時的時間
      maxWait: 60000
      # 配置間隔多久才進行一次檢測，檢測需要關閉的空閒連線，單位是毫秒
      timeBetweenEvictionRunsMillis: 60000
      # 配置一個連線在池中最小生存的時間，單位是毫秒
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECT 1 FROM DUAL
      testWhileIdle: true
      testOnBorrow: false
      testOnReturn: false
      # 開啟PSCache，並且指定每個連線上PSCache的大小
      poolPreparedStatements: true
      maxPoolPreparedStatementPerConnectionSize: 20
      # 配置監控統計攔截的filters，去掉後監控介面sql無法統計，'wall'用於防火牆
      #filters: stat,wall,log4j
      # 通過connectProperties屬性來開啟mergeSql功能；慢SQL記錄
      connection-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
      # 合併多個DruidDataSource的監控資料
      useGlobalDataSourceStat: true
#      web-stat-filter:
#          enabled: false
#      jsp-servlet:
#          class-name: com.alibaba.druid.support.http.StatViewServlet
#      init-parameters:
#          loginUsername: druid
#          loginPassword: druid
# Logger Config
logging:
  level:
    com.baomidou.mybatisplus.samples.quickstart: debug

mybatis-plus:
  global-config:
    db-config:
      db-type: MYSQL
      capital-mode: false #開啟大寫命名
      column-like: true #開啟 LIKE 查詢

三、接下來編寫DruidConfig、DruidStatFilter、DruidStatViewServlet三個類

DruidConfig.java

package com.kyplatform.admin.config.druid;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
/**
 * 配置druid需要的配置類，引入application.properties檔案中以spring.datasource開頭的資訊
 * 因此需要在application.properties檔案中配置相關資訊。
 * @author zhicaili
 *
 */

@Configuration//標識該類被納入spring容器中例項化並管理
@ServletComponentScan //用於掃描所有的Servlet、filter、listener
public class DruidConfig {
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.druid")//載入時讀取指定的配置資訊,字首為spring.datasource.druid
    public DataSource druidDataSource(){
        return new DruidDataSource();
    }
}

DruidStatFilter.java

package com.kyplatform.admin.config.druid;

import com.alibaba.druid.support.http.WebStatFilter;

import javax.servlet.annotation.WebFilter;
import javax.servlet.annotation.WebInitParam;

/**
 * 配置druid過濾規則
 */
@WebFilter(
        filterName="DruidWebStatFilter",
        urlPatterns = "/*",
        initParams = {
                @WebInitParam(name = "exclusions",value="*.js,*.jpg,*.png,*.gif,*.ico,*.css,/druid/*")//配置本過濾器放行的請求字尾
        }
)
public class DruidStatFilter  extends WebStatFilter {

}

DruidStatViewServlet.java

package com.kyplatform.admin.config.druid;

import com.alibaba.druid.support.http.StatViewServlet;

import javax.servlet.Servlet;
import javax.servlet.annotation.WebInitParam;
import javax.servlet.annotation.WebServlet;

/**
 * 配置druid頁面配置
 */
@WebServlet(urlPatterns="/druid/*",initParams = {
        @WebInitParam(name="allow",value = "127.0.0.1"),// IP白名單 (沒有配置或者為空，則允許所有訪問)
        @WebInitParam(name = "loginUsername",value = "root"),//使用者名稱
        @WebInitParam(name = "loginPassword",value = "admin"),//密碼
        @WebInitParam(name = "resetEnable",value = "true")// 允許HTML頁面上的“Reset All”功能
})
public class DruidStatViewServlet extends StatViewServlet implements Servlet {

}

配置好後，還要在springboot的啟動器類中新增@ServletComponentScan

package com.kyplatform;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.web.servlet.ServletComponentScan;
import org.springframework.context.annotation.Configuration;


@SpringBootApplication
@ServletComponentScan
@MapperScan("com.kyplatform.admin.mapper")
public class KyplatformApplication {

    public static void main(String[] args) {
        SpringApplication.run(KyplatformApplication.class, args);
    }
}

 配置好後，在瀏覽器中輸入http://127.0.0.1:9999/專案名/druid/login.html