使用JDBCTemplate执行IN（）SQL查询

Question

运行以下查询时出现错误。我知道我需要使用'？'与列表大小一样多，但列表大小不同，我不知道如何替换'？'。

public List<Object> findAllGrades(String pnr, List<String>codes) { 
    return jdbcTemplate.query(
      "select CourseParticipantship.grade from [thd].[dbo].[CourseParticipantship] " 
        + "inner join thd.dbo.CourseMaterial on courseMaterial_id = CourseMaterial.id " 
        + "inner join thd.dbo.Course on course_id = Course.id and Course.code in (?)" 
        + "inner join thd.dbo.Student on student_id = Student.id " 
        + "where Student.personalNumber in (?)",new Object[] { codes, pnr }, new RowMapper() { 
       public Object mapRow(ResultSet rs, int arg1) throws SQLException { 
        return rs.getObject("grade"); 
       } 
      }); 
} 

我得到这个错误：Unable to convert between java.util.ArrayList and JAVA_OBJECT

Answer 1

你应该在这里使用：+ "where S.pnr in (?)"

你必须改变

+ "where S.pnr= ?",new Object[] { codes, pnr }, new RowMapper() {

到

+ "where S.pnr in (?)",new Object[] { codes, pnr }, new RowMapper() {