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c3p0 usage record in java

怪我咯
怪我咯Original
2017-06-26 11:52:451376browse
  • First of all, you need to import the c3p0 package.c3p0After downloading and decompressing, there are three packages in the lib directory, use mysql If , you only need to import c3p0-0.9.5.2.jar,mchange-commons-java-0.2.11.jar.

  • ##To connect to the

    mysql database, you need to import mysql-connector-java-5.1.42-bin.jar.

  • For convenience To operate the database link for query, you need to import

    commons-dbutils-1.6.jar,commons-collections-3.2.2.jar,commons-logging-1.2.jar.

  • ##In order to make
  • c3p0

    easy to maintain, c3p0-config.xml

    <?xml version="1.0" encoding="UTF-8"?><c3p0-config>
      <default-config><property name="user">root</property><property name="password">root</property><property name="jdbcUrl">jdbc:mysql://127.0.0.1:3306/day20</property><property name="driverClass">com.mysql.jdbc.Driver</property>
      </default-config></c3p0-config>
    needs to be created in the src directory

  • Use
  • c3p0

    import javax.sql.DataSource;import com.mchange.v2.c3p0.ComboPooledDataSource;public class JdbcUtils {private static ComboPooledDataSource ds;static {
        ds = new ComboPooledDataSource();
    }public static DataSource getDataSource(){return ds;
    }
    }

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