[大数据]java代码中sql语句中含有中文时执行报错

sql语句中含有中文时执行报错

public Goods getByName(Connection connection, String name) {
    Goods goods = new Goods();
    String sql = "SELECT * FROM goods WHERE NAME=?";
    try {
        //name为中文  执行出错
        PreparedStatement preparedStatement = connection.prepareStatement(sql);
        preparedStatement.setString(1, name);
        ResultSet resultSet = preparedStatement.executeQuery();
        while (resultSet.next()) {
            int id = resultSet.getInt("id");
            int number = resultSet.getInt("number");
            int price = resultSet.getInt("price");
            String image = resultSet.getString("image");
            goods = new Goods(id, name, number, price, image);
        }
        System.out.println(goods.toString());
    } catch (SQLException throwables) {
        throwables.printStackTrace();
    }
    return goods;
}

以上例子中sql语句中包含中文，无法正常执行，resultSet为空。

解决：

在连接数据库时设置编码即可

String url = "jdbc:mysql://localhost:3306/数据库名?useUnicode=true&characterEncoding=UTF-8";