springboot2如何将数据源配置到tomcat的context.xml中并交给spring的DruidDataSource对象？

已经测试验证，两步即可：
1、yml配置如下
jndi-datasource: #jndi数据源的配置
open: true #是否开启jndi配置
jndiNameList: #开启jndi配置时,配置如下信息,spring.datasource不在生效
- dataSourceName: dataSource
dialect: oracle
jndiName: java:comp/env/jdbc/ccense
- dataSourceName: dataSource2
dialect: oracle
jndiName: java:comp/env/jdbc/face
2、创建JndiDataSourceConfig.java
@ConditionalOnProperty(prefix = "jndi-datasource", name = "open", havingValue = "true")
@Configuration
@EnableTransactionManagement(order = 2)
@Slf4j
public class JndiDataSourceConfig {

@Bean
@ConfigurationProperties(prefix = "newcap.jndi-datasource")
public JNDIProperties jndiProperties() {
    JNDIProperties jndiProperties = new JNDIProperties();
    return jndiProperties;
}

@Bean(name = "dataSource")
public DynamicDataSource dataSource() {
    HashMap<Object, Object> hashMap = new HashMap<>();

    JNDIProperties jndiProperties = jndiProperties();

    for (JndiProperties properties : jndiProperties.getJndiNameList()){
        DataSourceDialect.dataSourceNameDialect.put(properties.getDataSourceName(), properties.getDataSourceName());

        JndiDataSourceLookup lookup = new JndiDataSourceLookup();
        lookup.setResourceRef(true);
        DataSource dataSource = lookup.getDataSource(properties.getJndiName());
        hashMap.put(properties.getDataSourceName(), dataSource);
    }

    DynamicDataSource dynamicDataSource = new DynamicDataSource();

    dynamicDataSource.setTargetDataSources(hashMap);
    //设置主数据源
    dynamicDataSource.setDefaultTargetDataSource(hashMap.get(DatasourceEnum.DATA_SOURCE));
    return dynamicDataSource;
}

}

（1）配置tomcat的context.xml文件中，增加如下配置

<Resource name="jdbc/mbr"  
    factory="com.alibaba.druid.pool.DruidDataSourceFactory"  
    auth="Container"  
    type="javax.sql.DataSource"  
    driverClassName="oracle.jdbc.OracleDriver"  
    url="jdbc:oracle:thin:@//192.168.1.5:1901/testdb"  
    username="root"  
    password="root"  
    maxActive="50"  
    maxWait="10000"  
    removeabandoned="true"  
    removeabandonedtimeout="60"  
    logabandoned="false"  

    filters="stat" />

（2）yml配置文件中引用

spring:
  datasource:
    jndiName:
      masterDB: java:comp/env/jdbc/master
      clusterDB: java:comp/env/jdbc/mbr
            type: org.springframework.jndi.JndiObjectFactoryBean
            druid:
                # 下面为连接池的补充设置，应用到上面所有数据源中
                # 初始化大小，最小，最大
                initial-size: 5
                min-idle: 5
                max-active: 20
                # 配置获取连接等待超时的时间
                max-wait: 60000
                # 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒
                time-between-eviction-runs-millis: 60000
                # 配置一个连接在池中最小生存的时间，单位是毫秒
                min-evictable-idle-time-millis: 300000
                validation-query: SELECT 1 FROM DUAL
                test-while-idle: true
                test-on-borrow: false
                test-on-return: false
                # 打开PSCache，并且指定每个连接上PSCache的大小
                pool-prepared-statements: true
                #   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
                max-pool-prepared-statement-per-connection-size: 20
                filters: stat,wall
                use-global-data-source-stat: true
                # 通过connectProperties属性来打开mergeSql功能；慢SQL记录
                connect-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000
                # 配置监控服务器
                stat-view-servlet:
                    login-username: admin
                    login-password: 123456
                    reset-enable: false
                    url-pattern: /druid/*
                    # 添加IP白名单
                    #allow:
                    # 添加IP黑名单，当白名单和黑名单重复时，黑名单优先级更高
                    #deny:
                web-stat-filter:
                    # 添加过滤规则
                    url-pattern: /*
                    # 忽略过滤格式
                    exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"

https://www.cnblogs.com/Jason-Xiang/p/6586311.html