**1.account表結構**  **2.t_user表結構**  **3.role表結構**  **4.Account實體** ~~~ public class Account { private Integer id; //主鍵 private Double money; //金額 private User user; //賬戶關聯的用戶，多對一 ~~~ **5.Role實體** ~~~ public class Role { private Integer id; // 主鍵 private String role_name; //角色名 private String role_desc; //角色描述 private List<User> users; //一個角色下可能有多個用戶 ~~~ **6.User實體** ~~~ public class User { private Integer id; private String name; private String password; //一個用戶有多個賬戶，比如微信，支付寶 private List<Account> accounts; //一個用戶多個角色 private List<Role> roles; ~~~