Spring boot JDBC模板中“IN”关键字的使用[重复]

Question

我在 Spring Boot 中有这个查询，在 dao 类之一中。

查询

String sql = select * from language where screen = ? and lang = ? and screenid in (?)

请求对象

{
    "language" : {
         "screen" : "Index",
         "lang": "english",
         "screenid" : ["250","10","44","11"]
    }
}

我获取来自 JSON 请求的每个值并将其存储到 bean 中。

问题

screenid 有字符串值数组，我如何在查询中传递它？

我试过了，

String ids = LangObj.get("screenid").toString();
// this gives the value as ["250","10","44","11"]

当直接将此值传递给查询时，它的形式为select * from language where screen = 'Index' and lang = 'english' and screenid in (["250","10","44","11"])，因此没有给出任何输出，我正在寻找一个如下所示的查询，

select * from language where screen = 'Index' and lang = 'english' and screenid in ('250','10','44','11')

有什么建议吗？

Answer 1

请检查此文档：

https://www.baeldung.com/spring-jdbctemplate-in-list

示例代码：

List<Employee> getEmployeesFromIdList(List<Integer> ids) {
    String inSql = String.join(",", Collections.nCopies(ids.size(), "?"));
 
    List<Employee> employees = jdbcTemplate.query(
      String.format("SELECT * FROM EMPLOYEE WHERE id IN (%s)", inSql), 
      ids.toArray(), 
      (rs, rowNum) -> new Employee(rs.getInt("id"), rs.getString("first_name"), 
        rs.getString("last_name")));

    return employees;
}