【mybatis实现一对多查询】

约定不等于承诺〃 2024-03-31 09:50 46阅读 0赞

一对多：一个用户有多个账户

## 代码部分 ##

1、User.java

>     package com.qingruan.bean;
>     
>     import java.util.List;
>     
>     public class User {
>         private Integer id;
>         private String username;
>         private String sex;
>     
>         //查询用户信息同时关联账户信息
>         private List<Account> accounts;
>     
>         public List<Account> getAccounts() {
>             return accounts;
>         }
>     
>         public void setAccounts(List<Account> accounts) {
>             this.accounts = accounts;
>         }
>     
>         @Override
>         public String toString() {
>             return "User{" +
>                     "id=" + id +
>                     ", username='" + username + '\'' +
>                     ", sex='" + sex + '\'' +
>                     '}';
>         }
>     
>         public Integer getId() {
>             return id;
>         }
>     
>         public void setId(Integer id) {
>             this.id = id;
>         }
>     
>         public String getUsername() {
>             return username;
>         }
>     
>         public void setUsername(String username) {
>             this.username = username;
>         }
>     
>         public String getSex() {
>             return sex;
>         }
>     
>         public void setSex(String sex) {
>             this.sex = sex;
>         }
>     }

2、Account.java

>     package com.qingruan.bean;
>     
>     public class Account {
>         private Integer aid;
>         private Integer uid;
>         private double money;
>     
>         //在account类假如user类对象作为account类的一个属性
>         private User user;
>     
>         @Override
>         public String toString() {
>             return "Account{" +
>                     "aid=" + ai