Druid 连接池

记录Druid 连接池简单用法

package Utils;
import com.alibaba.druid.pool.DruidDataSourceFactory;
import javax.sql.DataSource;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties; 

public class Druid {
    private static DruidDataSource dataSource; 

    static {
        try { 

dataSource.setUrl();
dataSource.setDriverClassName();
dataSource.setUsername();
dataSource.setPassword();
//设置初始化建立物理连接个数，最小连接池数量，最大连接池数量
dataSource.setInitalSize(6);
dataSource.setMinIdle(5);
dataSource.setMaxActive(10);
//匹配获取连接等待超时时间
dataSource.setMaxWait(30000);

            InputStream inputStream = DBCP.class.getClassLoader().getResourceAsStream("dbconfig.properties");
            Properties properties = new Properties();
            properties.load(inputStream);
            dataSource = DruidDataSourceFactory.createDataSource(properties);
        } catch (Exception e) {
            e.printStackTrace();
        }
    } 

    public static Connection getConnection() throws SQLException {
        return dataSource.getConnection();
    } 

    public static void release(Connection conn, Statement st, ResultSet rs) {
        if (conn != null) {
            try {
                conn.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        if (st != null) {
            try {
                st.close();
            } catch (Exception e) {
                 e.printStackTrace();
            }
        }
        if (rs != null) {
             try {
                rs.close();
            } catch (Exception e) {
                e.printStackTrace();
             }
        }
    }
}