如何在动态SQL搜索中使用LIKE？

Question

我尝试进行动态不区分大小写的搜索，但最终我的参数索引超出范围（1＆gt;参数个数，为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();

当你在那时调用setString() api时使用表达式。

对于不区分大小写的搜索，您必须在

之前添加COLLATE UTF8_GENERAL_CI