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今天小编给大家分享一下使用mybatisPlus生成oracle自增序列遇到的坑如何解决的相关知识点,内容详细,逻辑清晰,相信大部分人都还太了解这方面的知识,所以分享这篇文章给大家参考一下,希望大家阅读完这篇文章后有所收获,下面我们一起来了解一下吧。
记录一次使用mybatisPlus遇到的坑,在网上找了各种配置,依然没有实现oracle插入数据实现序列自增,原因是引入的mybatisPlus依赖有误。
下面记录下代码:
<!--mybatis plus--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.0.6</version> </dependency>
mybatis-plus: #配置mapper.xml路径 mapper-locations: classpath:/mapper/*.xml #配置实体类路径 type-aliases-package: com.jp.entity global-config: #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"; id-type: 1 #驼峰下划线转换 db-column-underline: true configuration: #配置打印sql log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
配置类一定不能少,自以为在application.yml文件中配置过就完事了,谁知道还要添加一个配置类来配置oracle序列,就是这里坑了我好久,一定记得加上。
如下:
package com.jp.config; import com.baomidou.mybatisplus.extension.incrementer.OracleKeyGenerator; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; /** * @author ljp * @date 2020/4/23 22:14 */ @Configuration @MapperScan("com.jp.mapper") public class MybatisPlusConfig { @Bean public OracleKeyGenerator oracleKeyGenerator() { return new OracleKeyGenerator(); } }
package com.jp.entity; import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.annotation.KeySequence; import com.baomidou.mybatisplus.annotation.TableId; import com.baomidou.mybatisplus.annotation.TableName; import lombok.Data; import java.io.Serializable; import java.util.Date; /** * @author :Y19090908 * @date :Created in 2020/3/25 下午 05:17 */ @Data @TableName("people") @KeySequence(value = "seq_people", clazz = Integer.class) public class People implements Serializable { private static final long serialVersionUID = 1110056585174675869L; @TableId(value = "ID", type = IdType.INPUT) private Integer id; private String name; private String sex; private String city; private String job; private String money; private Date createTime; public People() { } public People(String name, String sex, String city, String job, String money) { this.name = name; this.sex = sex; this.city = city; this.job = job; this.money = money; } public People(Integer id, String name, String sex, String city, String job, String money) { this.id = id; this.name = name; this.sex = sex; this.city = city; this.job = job; this.money = money; } }
mapper:
@Mapper public interface PeopleMapper extends BaseMapper<People> { List<People> selectDistinct(); void importExcel(List<People> list); void importAll(List<People> list); void callInsert(Map<String, Object> map); void removeAll(); }
service:
package com.jp.service; import com.baomidou.mybatisplus.extension.service.IService; import com.jp.bean.ErrorExcelResult; import com.jp.entity.People; import java.util.List; /** * @author :Y19090908 * @date :Created in 2020/3/25 下午 05:24 */ public interface PeopleService extends IService<People> { /** * excel導入 * * @param list * @return */ Object importExcel(List<People> list) throws Exception; List<ErrorExcelResult> importExcelForEach(List<People> list) throws Exception; List<People> selectDistinct(); }
@Service public class PeopleServiceImpl extends ServiceImpl<PeopleMapper, People> implements PeopleService { @Autowired private PeopleMapper peopleMapper; @Override @Transactional(rollbackFor = Exception.class) public Object importExcel(List<People> list) throws Exception { if (MyStringUtil.isEmpty(list)) { throw new Exception("沒有要導入的數據"); } peopleMapper.importAll(list); Map<String, Object> map = new HashMap<>(); peopleMapper.callInsert(map); List<People> repeatList = (List<People>) map.get("P_CURSOR"); List<ErrorExcelResult> errorList = new ArrayList<>(); ErrorExcelResult errorExcelResult; if (!MyStringUtil.isEmpty(repeatList)) { for (People p : repeatList) { errorExcelResult = new ErrorExcelResult(p.getName(), p.getSex(), p.getCity(), p.getJob(), p.getMoney(), "數據重複"); errorList.add(errorExcelResult); } } // peopleMapper.removeAll(); return errorList; } @Override @Transactional(rollbackFor = Exception.class) public List<ErrorExcelResult> importExcelForEach(List<People> list) throws Exception { if (MyStringUtil.isEmpty(list)) { throw new Exception("沒有要導入的數據"); } List<ErrorExcelResult> errorList = new ArrayList<>(); ErrorExcelResult errorExcelResult; List<People> rightList = new ArrayList<>(); long start = System.currentTimeMillis(); for (People p : list) { //如果重複記錄該條數據 if (peopleMapper.selectCount(new QueryWrapper<People>().eq("name", p.getName()).eq("sex", p.getSex())) > 0) { errorExcelResult = new ErrorExcelResult(p.getName(), p.getSex(), p.getCity(), p.getJob(), p.getMoney(), "該條數據重複"); errorList.add(errorExcelResult); continue; } rightList.add(p); } peopleMapper.importExcel(rightList); // this.saveBatch(rightList); long end = System.currentTimeMillis(); System.out.println(end - start); return errorList; } @Override public List<People> selectDistinct() { return peopleMapper.selectDistinct(); } }
service实现类是要加@Service注解的,之前会忘记。
下面是新增的接口,还是蛮简单的,只把添加的接口展示出来了。
@PostMapping("/page/easy/add") @ResponseBody public Object add(@RequestBody People people) { JSONObject jsonObject = new JSONObject(); try { validate(people); people.setCreateTime(new Date()); peopleService.save(people); jsonObject.put("code", 0); return jsonObject; } catch (Exception e) { log.error(e.getMessage()); jsonObject.put("code", 1); jsonObject.put("msg", e.getMessage()); return jsonObject; } }
只是白天工作的时候一直生成数据库序列自增失败,所以下班想找找原因,代码写的特别简单,就是为了试试能不能生成自增序列。
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