我正试图在spring boot上编写一个自定义查询。但我面临着这个错误。如何解决此问题。我的数据库中有三个表。学生、老师和班级。我想把班上所有的学生都叫来。还有全班的老师。我正在尝试编写自定义联接查询。问题在哪里？我也面临着这些问题：
第1:113行：意外标记：类第1:119行：意外标记：类id
这是我的模型：
学生：

@Entity
public class Student {
@Id
private int s_id;
@NotNull
private String s_name;
@NotNull
private Date admission_date;
@ManyToOne
private Class class_id;

public Student(String s_name) {
    this.s_name = s_name;
}
public int getS_id() {
    return s_id;
}
public void setS_id(int s_id) {
    this.s_id = s_id;
}
public String getS_name() {
    return s_name;
}
public void setS_name(String s_name) {
    this.s_name = s_name;
}
public Date getAdmission_date() {
    return admission_date;
}
public void setAdmission_date(Date admission_date) {
    this.admission_date = admission_date;
}
public Class getClass_id() {
    return class_id;
}
public void setClass_id(Class class_id) {
    this.class_id = class_id;
}
}

老师：

@Entity
public class Teacher {
@Id
private int t_id;
@NotNull
private String t_name;

public Teacher(String t_name) {
    super();
    this.t_name = t_name;
}
@ManyToMany(cascade = CascadeType.ALL)
@JoinTable
private Set<Class> classes;

public int getT_id() {
    return t_id;
}
public void setT_id(int t_id) {
    this.t_id = t_id;
}
public String getT_name() {
    return t_name;
}
public void setT_name(String t_name) {
    this.t_name = t_name;
}
public Set<Class> getClasses() {
    return classes;
}
public void setClasses(Set<Class> classes) {
    this.classes = classes;
}

}

类别：

@Entity
public class Class {
@Id
private int class_id;
@NotNull
private String class_name;
@NotNull
private String course_name;

@ManyToMany(mappedBy = "classes")
private Set<Teacher> teachers;

public int getClass_id() {
    return class_id;
}
public void setClass_id(int class_id) {
    this.class_id = class_id;
}
public String getClass_name() {
    return class_name;
}
public void setClass_name(String class_name) {
    this.class_name = class_name;
}
public String getCourse_name() {
    return course_name;
}
public void setCourse_name(String course_name) {
    this.course_name = course_name;
}
public Set<Teacher> getTeachers() {
    return teachers;
}
public void setTeachers(Set<Teacher> teachers) {
    this.teachers = teachers;
}

}
研究假设：

@Repository
public interface StudentRepository extends JpaRepository<Student,Integer> {

    @Query("from Student as s Join Class on s.class_id = Class.class_id where Class.class_id 
    =id")
    public List<Student> getStudent(@Param("id") int id);

}

教师资源库：

public interface TeacherRepository extends JpaRepository<Teacher,Integer> {

    @Query(" t.t_name from Teacher as t inner join teacher_classes as tc on (tc.t_id = t.t_id) 
   inner join Class as c on (c.class_id = tc.class_id) where c.id = id")
    public List<Teacher> getTeacher(@Param("id") int id);

}