tomcat6 mysql连接池配置

<Context>
    <Resource name="jdbc/MyDB"
              auth="Container"
              type="javax.sql.DataSource"
              maxTotal="100"
              maxIdle="30"
              maxWaitMillis="10000"
              username="your_username"
              password="your_password"
              driverClassName="com.mysql.jdbc.Driver"
              url="jdbc:mysql://localhost:3306/your_database"/>
</Context>

<resource-ref>
    <description>DB Connection</description>
    <res-ref-name>jdbc/MyDB</res-ref-name>
    <res-type>javax.sql.DataSource</res-type>
    <res-auth>Container</res-auth>
</resource-ref>

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.sql.DataSource;

public class DBUtil {
    private static DataSource dataSource;

    static {
        try {
            Context ctx = new InitialContext();
            dataSource = (DataSource) ctx.lookup("java:comp/env/jdbc/MyDB");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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

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

    public static void main(String[] args) {
        Connection conn = null;
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            conn = getConnection();
            String sql = "SELECT * FROM your_table";
            ps = conn.prepareStatement(sql);
            rs = ps.executeQuery();
            while (rs.next()) {
                // 处理结果集
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            close(conn, ps, rs);
        }
    }
}