java - HQL 查询忽略重音符号

Question

我有以下查询:

select u from User u where upper(u.name) like upper(?1)

如果忽略 u.name 和 ?1 中的重音符号，情况会怎样？

Answer 1

我已经找到了实现这个的方法。基本上有两个步骤:

1. 规范化参数(在您的情况下为 1)和
2. 标准化数据库中的数据

示例

public User getByName(String paramName) {
   .....
}

原始 HQL 查询:

String queryString = "select u from User u where u.name : =paramName";

新查询:

paramName = normalizer(paramName );

String queryString = "select u from User u where " + replacer(u.name) +" : =paramName";

还有两种方法:

public static String normalizer(String s)  {
    return Normalizer.normalize(s, Normalizer.Form.NFD).replaceAll("[^\\p{ASCII}]", "");
}

public String replacer(String param) {
    String t1 = "àâäçéèëêùûüôöïî";
    String t2 = "aaaceeeeuuuooii";
    String s = param;
    for (int i = 0; i < t1.length(); i++) {
        s = "replace(" + s + ",'" + t1.charAt(i) + "','" + t2.charAt(i) + "')";
    }
    return s;
}