springboot+mybatis plus

pom.xml:

		<dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.1.2</version>
        </dependency>

配置：

#mysql
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306/school?serverTimezone=Hongkong&useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=password
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.dbcp2.min-idle=5
spring.datasource.dbcp2.initial-size=5
spring.datasource.dbcp2.max-total=5
spring.datasource.dbcp2.max-wait-millis=200
#mybatis-plus
# 如果是放在src/main/java目录下 classpath:/com/yourpackage/*/mapper/*Mapper.xml
# 如果是放在resource目录 classpath:/mapper/*Mapper.xml
mybatis-plus.mapper-locations=classpath:/com/springboot/study/mapper/*Mapper.xml
#实体扫描，多个package用逗号或者分号分隔
mybatis-plus.type-aliases-package=com.springboot.study.entity
#主键类型  0:"数据库ID自增", 1:"用户输入ID",2:"全局唯一ID (数字类型唯一ID)", 3:"全局唯一ID UUID";
mybatis-plus.global-config.id-type=3
#字段策略 0:"忽略判断",1:"非 NULL 判断"),2:"非空判断"
mybatis-plus.global-config.field-strategy=2
#驼峰下划线转换
mybatis-plus.global-config.db-column-underline=true
#mp2.3+ 全局表前缀 mp_
#mybatis-plus.global.table-prefix: mp_
#刷新mapper 调试神器
mybatis-plus.global-config.refresh-mapper=true
#数据库大写下划线转换
mybatis-plus.global-config.capital-mode=true
# Sequence序列接口实现类配置
mybatis-plus.global-config.key-generator=com.baomidou.mybatisplus.incrementer.OracleKeyGenerator
#逻辑删除配置（下面3个配置）
mybatis-plus.global-config.logic-delete-value=1
mybatis-plus.global-config.logic-not-delete-value=0
mybatis-plus.global-config.sql-injector=com.baomidou.springboot.MyMetaObjectHandler
#配置返回数据库(column下划线命名&&返回java实体是驼峰命名)，自动匹配无需as（没开启这个，SQL需要写as： select user_id as userId）
mybatis-plus.configuration.map-underscore-to-camel-case=true
mybatis-plus.configuration.cache-enabled=false

#配置JdbcTypeForNull, oracle数据库必须配置
mybatis-plus.configuration.jdbc-type-for-null=null

MybatisPlusConfig.java

@EnableTransactionManagement
@Configuration
public class MybatisPlusConfig {

    @Bean
    public PaginationInterceptor paginationInterceptor(){
    	 // paginationInterceptor.setLimit(你的最大单页限制数量，默认 500 条，小于 0 如 -1 不受限制);
        return new PaginationInterceptor();
    }

}

user表

CREATE TABLE `user` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(255) DEFAULT NULL,
  `qq` varchar(255) DEFAULT NULL,
  `age` int(11) DEFAULT NULL,
  `creat_time` datetime DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=25 DEFAULT CHARSET=utf8;

Entity

@Data
@TableName("user")
public class User {

    //使用 @ApiModelProperty(hidden = true) 使swagger输入参数示例不显示此字段
    @ApiModelProperty(hidden = true)
    //数据库主键自增
    @TableId(value = "id",type = IdType.AUTO)
    private Integer id;

    private String name;

    private String qq;

    private Integer age;

    @ApiModelProperty(hidden = true)
    private Date creatTime;

}

需要进行批量操作可以继承 mybatisplus 的 ServiceImpl

@Service
public class UserServiceImpl extends ServiceImpl<UserMapper,User> implements UserService

Mapper没有使用全局@MapperScan注解指向我们的mapper包的话, 我们就要为每个业务mapper使用@Mapper将业务mapper注入到Spring容器中

@Mapper
public interface UserMapper extends BaseMapper<User>{
}