说明： 删除与更新用的方法类似，这里仅以更新数据为例。

方法一，Play！封装的JPA：
查询后，直接更新字段并保存

long id = 1;
DogEntity entity = DogEntity.findById(id);
entity.name = "Mike"；
entity.color = "brown";
entity.save();

方法二， 原生JPA—JPA.em().createQuery(sql).executeUpdate()：

        String sql = "update DogEntity set " +
                "name ='Mike', color = 'brown' " +
                "where id = 1";
 int count = JPA.em().createQuery(sql).executeUpdate();
 logger.info("删除个数:" + count);

方法三， JDBC—pstmt.executeUpdate():

String sql = "update DogEntity set " +
                "name = ?, color = ?, +
                "where id = ?";
        logger.debug(sql);
        Connection conn = null;
        PreparedStatement pstmt=null;
        boolean flag = false;
        try {
            conn = DBTool.getConnection();
        } catch (Exception e) {
            e.printStackTrace();
            DBTool.close(null, pstmt, conn);
            logger.info("数据库连接出错");
        }

        try {
            pstmt = conn.prepareStatement(sql);
            pstmt.setString(1,"Mike");
            pstmt.setString(2, "brown");
            pstmt.setLong(3, 1);
            int count = pstmt.executeUpdate();
            logger.debug("更新条数：" + count);
            flag = true;
        } catch (SQLException e) {
            e.printStackTrace();
            logger.info("SQL语句出错");
        }finally{
            DBTool.close(null, pstmt, conn);
        }
        return flag;