java 数据库连接（MySQL）

import java.sql.*;
import java.util.*;
import java.math.*;
import static java.lang.System.out;

public class DBconnection {
  static final String driverClass="com.mysql.jdbc.Driver";
  static final String connStr="jdbc:mysql://localhost:3306/mall?useUnicode=true&characterEncoding=utf-8";
  static final String user="root";
  static final String pass="admin";

  static Connection conn; //声明Connection对象

  public Connection getConn() {

      try {
        Class.forName(driverClass);
        //out.print("连接成功");
      } catch (ClassNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.out.println("数据库驱动加载错误!");
      }

      try{
        conn =  DriverManager.getConnection(connStr, user, pass);
      }catch (SQLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        System.out.println("数据库连接错误!");
      }

      return conn;
    }
}