运行后SQL,MyBatis就会卡住不动

遇到一个很奇怪的问题,MyBatis使用对象传参,感觉写的没问题,但是运行后,MyBatis就会卡住不动
servlet层

        if("selectByNameByEmailByAge".equals(re)){
            Student stu = new StudentServiceImpl().selectByNameByEmailByAge(new Student(request.getParameter("name"),request.getParameter("email"),Integer.parseInt(request.getParameter("age"))));
            text = stu != null ? stu.toString() : "没有查询到哦!";
            System.out.println(text);
        }

dao层

   Student selectByNameByEmailByAge(Student stu);

Mapper文件

    <select id="selectByNameByEmailByAge" resultType="Student">
        select *
        from student
        where name = #{name} and email = #{email} and age = #{age}
    </select>

实体类

public class Student {
    private int id;
    private String name;
    private String email;
    private int age;

    public Student(int id, String name, String email, int age) {
        this.id = id;
        this.name = name;
        this.email = email;
        this.age = age;
    }

    public Student(String name, String email, int age) {
        this.id = id;
        this.name = name;
        this.email = email;
        this.age = age;
    }
实体类中省略getset方法

我反复阅读都没问题,但是就是会卡住,我也尝试过在Mapper写其他的,比如加上参数类型什么的,但是都没用,直到我又删了重新写了一遍,居然就好了!很奇怪!

好了不就行了吗，不用太纠结了