DButils与JDBC

JDBC（Java DataBase Connectivity,java数据库连接）是一种用SQL语句操作数据库的Java API，可对关系数据库进行增删改查等的操作。

DButils是一个封装了对JDBC操作的类库，简化了操作代码。

JDBC查询代码：

 public static Account get(String accountId){
        String sql = "SELECT * FROM account WHERE accountId=?";
        Connection conn = DButil.getConnection();
        try {
            PreparedStatement ps = conn.prepareStatement(sql);
            ps.setString(1,accountId);
            ResultSet rs = ps.executeQuery();
            while (rs.next()){
                Account account = new Account();
                account.setAccountId(rs.getString("accountId"));
                account.setPassword(rs.getString("password"));
                account.setName(rs.getString("name"));
                account.setPhone(rs.getString("phone"));
                account.setCountry(rs.getString("country"));
                account.setRole(rs.getByte("role"));
                return account;
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
        }

DButils查询代码：

  public static Account get(String id){
        String sql = "select * from account where id=?";
        Connection conn = DButil.getConnection();
        QueryRunner qr = new QueryRunner();
        Object params[] = {id};
        try {
            return qr.query(conn,sql,new BeanHandler<Account>(Account.class),params);
        } catch (SQLException e) {
            e.printStackTrace();
        }
        return null;
        }

节约了时间提高了开发效率。