java - 如何在动态sql搜索中使用LIKE？

Question

我正在尝试进行动态的不区分大小写的搜索，但结果是参数索引超出范围(1 > 参数数量，即 0)

     java.sql.PreparedStatement preStatement = connect.prepareStatement
                            "SELECT word1 from words WHERE word2 like '%?%'");
     preStatement.setString(1, word);
     ResultSet rs = preStatement.executeQuery();

Answer 1

java.sql.PreparedStatement preStatement = connect.prepareStatement
                            "SELECT word1 from words WHERE word2 COLLATE UTF8_GENERAL_CI like '?'");
preStatement.setString(1, "%"+word+"%");
ResultSet rs = preStatement.executeQuery();

当您调用 setString() api 时，请使用表达式。

对于不区分大小写的搜索，您必须在 like 之前添加 COLLATE UTF8_GENERAL_CI