mybatis_CRUD实战
作者:互联网
数据表:
CREATE TABLE user
(
id BIGINT(20) NOT NULL COMMENT '主键ID',
name VARCHAR(30) NULL DEFAULT NULL COMMENT '姓名',
age INT(11) NULL DEFAULT NULL COMMENT '年龄',
email VARCHAR(50) NULL DEFAULT NULL COMMENT '邮箱',
PRIMARY KEY (id)
);
实体类:
@AllArgsConstructor
@NoArgsConstructor
@Data
@Component
// 默认类名与表名一致,若不一致则使用注解标注表名()
// @TableName("user")
public class User {
//类的所有属性都应该在数据库中
@TableField(exist = false) // 在表中不存在
private String username;
@TableField(exist = false)
private String password;
private Long id;
private String name;
private Integer age;
private String email;
}
mapper接口:
// 继承 BaseMapper 声明了众多基本增删改查方法
@Mapper
public interface UserMapper extends BaseMapper<User> {
}
- BaseMapper:public interface BaseMapper
extends Mapper
Service接口:
// 继承IService接口
// 声明了众多基本增删改查方法
public interface UserService extends IService<User> {
}
- IService:public interface IService
Service具体实现:
// 继承ServiceImpl类--->Iservice接口的众多方法的基本实现
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {
}
- ServiceImpl:public class ServiceImpl<M extends BaseMapper
, T> implements IService
Controller
@GetMapping("/dynamic_table")
public String dynamic_table(Model model){
// 表格从数据库获取数据
List<User> list = userService.list();
model.addAttribute("users",list);
return "table/dynamic_table";
}
dynamic_table表格
<table class="display table table-bordered table-striped" id="dynamic-table">
<thead>
<tr>
<th>#</th>
<th>id</th>
<th>name</th>
<th>age</th>
<th>email</th>
</tr>
</thead>
<tbody>
<!--users由model传入,user:users中的每一个元素,stats当前元素迭代状态-->
<tr class="gradeX" th:each="user,stats:${users}">
<td th:text = "${stats.count}">count</td>
<td th:text = "${user.id}">id</td>
<td th:text = "${user.name}">name</td>
<td >[[${user.age}]]</td>
<td >[[${user.email}]]</td>
</tr>
</tbody>
</table>
标签:实战,IService,String,CRUD,private,mybatis,table,NULL,public 来源: https://www.cnblogs.com/chao-s/p/15177309.html