Driver driver = new com.mysql.cj.jdbc.Driver();
// 創(chuàng)建連接
Connection con = driver.connect(JDBC_URL, props);
Statement statement = con.createStatement();
ResultSet resultSet = statement.executeQuery("show tables");
while (resultSet.next()) {
    System.out.println(resultSet.getString(1));
}
con.close();

// druid 數(shù)據(jù)源
DruidDataSource druidDataSource = new DruidDataSource();
// 數(shù)據(jù)源配置
druidDataSource.setUrl(JDBC_URL);
druidDataSource.setUsername(USERNAME);
druidDataSource.setPassword(PASSWORD);
// 初始化
druidDataSource.init();
// 獲取表名
Connection con = druidDataSource.getConnection();
Statement statement = con.createStatement();
ResultSet resultSet = statement.executeQuery("show tables");
while (resultSet.next()) {
    System.out.println(resultSet.getString(1));
}
con.close();

    <!--引入druid數(shù)據(jù)源-->
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>druid-spring-boot-starter</artifactId>
        <version>1.2.6</version>
    </dependency>

spring:
  datasource:
   #數(shù)據(jù)源基本配置
    username: root
    password: 123456
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/ssm_crud
    type: com.alibaba.druid.pool.DruidDataSource
   #數(shù)據(jù)源其他配置
    druid:
      #配置初始化大小、最小、最大線程數(shù)
      initialSize: 5
      minIdle: 5
      #CPU核數(shù)+1，也可以大些但不要超過20，數(shù)據(jù)庫加鎖時連接過多性能下降
      maxActive: 20
     # 最大等待時間，內(nèi)網(wǎng)：800，外網(wǎng)：1200（三次握手1s）
      maxWait: 60000
      timeBetweenEvictionRunsMillis: 60000
     #配置一個連接在池中最大空間時間，單位是毫秒
      minEvictableIdleTimeMillis: 300000
      validationQuery: SELECT 1 
      testWhileIdle: true
     # 設(shè)置從連接池獲取連接時是否檢查連接有效性，true檢查，false不檢查
      testOnBorrow: true
      # 設(shè)置從連接池歸還連接時是否檢查連接有效性，true檢查，false不檢查
      testOnReturn: true
      #可以支持PSCache（提升寫入、查詢效率）
      poolPreparedStatements: true
      #配置監(jiān)控統(tǒng)計攔截的filters，去掉后監(jiān)控界面sql無法統(tǒng)計，'wall'用于防火墻  
      filters: stat,wall,log4j
      maxPoolPreparedStatementPerConnectionSize: 20
      useGlobalDataSourceStat: true  
      connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

public static void main(String[] args) throws Exception {
        String password = "root123";
        System.out.println("明文密碼: " + password);
        String[] keyPair = ConfigTools.genKeyPair(512);
        //私鑰
        String privateKey = keyPair[0];
        //公鑰
        String publicKey = keyPair[1];
        //用私鑰加密后的密文
        password = ConfigTools.encrypt(privateKey, password);

        System.out.println("privateKey:" + privateKey);
        System.out.println("publicKey:" + publicKey);

        System.out.println("password:" + password);

        String decryptPassword = ConfigTools.decrypt(publicKey, password);
        System.out.println("解密后:" + decryptPassword);
    }

java -cp D:/xxxx/druid-1.2.8/druid-1.2.8.jar com.alibaba.druid.filter.config.ConfigTools root

java -cp D:/xxxx/druid-1.2.8/druid-1.2.8.jar com.alibaba.druid.filter.config.ConfigTools 123456

spring:
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driverClassName: com.mysql.jdbc.Driver
    publicKey: MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBAKXfJyPsQ1rvSQXO+8m1TrIWS5XSSwzwDBIjPGZNbpZ10+Tai7k1GMzF6eufgMNWlNwOHJvxIYwjrts8b4UbSiECAwEAAQ==
    druid:
        url: jdbc:mysql://lcoahost:3306/test1?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8&useSSL=false
        username: root
        password: ENC(EChlZH6XdPa129Ii3akF/92alTAIifYXdbFJaqKlmcQNF0a/QRoaAook16eO72vw4S4Ut8nXeoGOMdgFkQuW+A==)
      initial-size: 10
      max-active: 100
      min-idle: 10
      max-wait: 60000
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      time-between-eviction-runs-millis: 60000
      min-evictable-idle-time-millis: 300000
      #validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
      test-on-borrow: false
      test-on-return: false
      stat-view-servlet:
        enabled: true
        url-pattern: /druid/*
        #login-username: admin
        #login-password: admin
      filter:
        stat:
          log-slow-sql: true
          slow-sql-millis: 1000
          merge-sql: false
        wall:
          config:
            multi-statement-allow: true
        config:
          enabled: true 
      connection-properties: config.decrypt=true;config.decrypt.key=${spring.datasource.publicKey}

spring.datasource.druid.connection-properties

spring.datasource.druid.filter.config.enabled=true