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  1. Context
  2. <?xml version = "1.0" encoding = "UTF-8"?>
  3. <Context>
  4.   <Resource name="jdbc/shop_MYSQL"
  5.             global="jdbc/shop_MYSQL"
  6.             auth="Container"
  7.             type="javax.sql.DataSource"
  8.             maxActive="100" maxIdle="30" maxWait="10000"
  9.             username="root"
  10.             driverClassName="com.mysql.jdbc.Driver"
  11.             defaultAutoCommit="false"
  12.             defaultTransactionIsolation="READ_COMMITTED"
  13.             url="jdbc:mysql://localhost:3306/shop"/>
  14. </Context>
  15.  
  16. web.xml
  17.     </context-param>
  18.     <resource-ref>
  19.         <res-ref-name>jdbc/shop_MYSQL</res-ref-name>
  20.         <res-type>javax.sql.DataSource</res-type>
  21.         <res-auth>Container</res-auth>
  22.     </resource-ref>
  23.  
  24. Pom
  25.     <dependency>
  26.             <groupId>mysql</groupId>
  27.             <artifactId>mysql-connector-java</artifactId>
  28.             <version>8.0.11</version>
  29.         </dependency>
  30.         <dependency>
  31.             <groupId>org.apache.tomcat</groupId>
  32.             <artifactId>tomcat-jdbc</artifactId>
  33.             <version>8.0.20</version>
  34.         </dependency>
  35.  
  36.        code:
  37.         Context ctx = new InitialContext();
  38.         ds  = (DataSource) ctx.lookup("java:comp/env/jdbc/shop_MYSQL");
  39.         Connection conn = ds.getConnection();
  40.  
  41. org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class '' for connect URL 'null'
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