【mybatis实现一对多查询】

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