springboot整合mybatis-plus实现多表分页查询实现
时间: 2023-12-20 15:07:42 浏览: 51
您好!关于您的问题,我可以帮您解答。针对springboot整合mybatis-plus实现多表分页查询实现,可以按照以下步骤进行:
1.在pom.xml文件中添加Mybatis-Plus和Pagehelper的依赖,如下:
```
<!-- Mybatis-Plus依赖 -->
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.0.5</version>
</dependency>
<!-- Pagehelper依赖 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>1.2.13</version>
</dependency>
```
2.在Mybatis-Plus的配置文件中,指定分页插件。如下:
```
@Configuration
@MapperScan("com.example.mapper")
public class MybatisPlusConfig {
@Bean
public PaginationInterceptor paginationInterceptor() {
return new PaginationInterceptor();
}
}
```
3.编写Mapper和对应的Mapper.xml文件,进行多表联合查询,并在Mapper接口方法上添加分页参数。如下:
```
//在Mapper接口方法上添加分页参数
public interface UserMapper extends BaseMapper<User> {
List<User> selectUserPage(Page<User> page);
}
<!-- 在Mapper.xml中编写多表联合查询SQL语句 -->
<select id="selectUserPage" resultMap="BaseResultMap">
select u.*, r.role_name
from user u
left join user_role ur on u.id = ur.user_id
left join role r on ur.role_id = r.id
<where>
<if test="username != null and username != ''">
and u.username like concat('%',#{username},'%')
</if>
</where>
</select>
```
4.在Controller层中,接受分页参数并返回分页结果。如下:
```
@RestController
public class UserController {
@Autowired
private UserMapper userMapper;
@GetMapping("/users")
public Page<User> selectUserPage(@RequestParam(defaultValue = "1") Integer page,
@RequestParam(defaultValue = "10") Integer size,
String username) {
Page<User> p = new Page<>(page, size);
p = userMapper.selectUserPage(p, username);
return p;
}
}
```
以上就是整合Mybatis-Plus和Pagehelper实现多表分页查询的具体步骤,希望能对您有所帮助!如果您有其他问题,欢迎继续提问。