MyBatis一对一association用法

我不是女神ヾ 2023-06-19 14:29 4阅读 0赞

形如下面的类student和role。假设一个学生只能对应一种角色，是班长或者是文艺委员或者是什么。

是一对一的关系。

package com.example.demo;
    
    public class Role {
        private Long roleId;
        private String roleName;
        private Student student;
    
        public Long getRoleId() {
            return roleId;
        }
    
        public void setRoleId(Long roleId) {
            this.roleId = roleId;
        }
    
        public String getRoleName() {
            return roleName;
        }
    
        public void setRoleName(String roleName) {
            this.roleName = roleName;
        }
    
        public Role(Student student) {
            this.student = student;
        }
    }

package com.example.demo;
    
    public class Student {
        private Long roleId;
        private Long studentId;
        private String studentName;
    
        public Student(Long roleId) {
            this.roleId = roleId;
        }
    
        public Long getStudentId() {
            return studentId;
        }
    
        public void setStudentId(Long studentId) {
            this.studentId = studentId;
        }
    
        public String getStudentName() {
            return studentName;
        }
    
        public void setStudentName(String studentName) {
            this.studentName = studentName;
        }
    }

使用mybatis的一对一association方法就能轻易的解决这个问题。