前言：安装完达梦数据库后，需要初始化实例，在初始化实例时，需要注意大小写敏感的设置。大小写敏感只能在初始化数据库的时候设置，默认为大小写敏感，一旦设置成功就无法修改，如果想要修改，只能重新初始化实例。因为mybatisPlus+springboot查询时会自动去转换大小写，其中字段会转成带有“”的“field”，不如然会报错；

查询‍‍‍‍‍‍‍达梦数据库大小写是否敏感：

结果为 1 是大小写敏感；结果为 0 是不敏感。
SELECT CASE_SENSITIVE();

一丶.创建idea项目

新建一个项目，使用Spring Initializr初始化一个SpringBoot项目

二丶添加POM依赖

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion>
<parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.1.2.RELEASE</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.puwang</groupId><artifactId>post-power-message</artifactId><version>0.0.1-SNAPSHOT</version><name>post-power-grid</name><url>http://maven.apache.org</url><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding></properties><dependencies><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.2.0</version></dependency><dependency><groupId>org.apache.commons</groupId><artifactId>commons-lang3</artifactId></dependency><!--getter setter--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><version>1.16.20</version><scope>provided</scope></dependency><!--連接池--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>com.dameng</groupId><artifactId>Dm8JdbcDriver18</artifactId><version>8.1.1.49</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.2.83</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins><resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes></resource><resource><directory>src/main/resources</directory><includes><include>**/*</include></includes></resource></resources></build>
</project>

三丶修改application.yml配置文件

server:port: 12001
spring:datasource:driver-class-name: dm.jdbc.driver.DmDriverurl: jdbc:dm://127.0.0.1:5236?schema=PERSON&compatibleMode=mysql&characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Shanghaiusername: SYSDBApassword: SYSDBA
mybatis-plus:configuration:# 驼峰转换 从数据库列名到Java属性驼峰命名的类似映射map-underscore-to-camel-case: false# 是否开启缓存cache-enable: false# 如果查询结果中包含空值的列，则 MyBatis 在映射的时候，不会映射这个字段#call-setters-on-nulls: true# 打印sqllog-impl: org.apache.ibatis.logging.stdout.StdOutImpl

四丶编写entity，注意TableName 把模式名称加上

@TableName(value = "AIJOB.PRODUCT")
@Data
public class Product implements Serializable {private static final long serialVersionUID = 1L;@TableId(value = "ID", type = IdType.AUTO)private Integer id;private String productName;private String bigData;@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")@JsonFormat(timezone = "GMT+8", pattern = "yyyy-MM-dd HH:mm:ss")private Date createTime;}

五丶这个模式下分页可能会失效，加上分页的配置

import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration
public class MyBatisPlusConfig {@Beanpublic PaginationInterceptor paginationInterceptor() {return new PaginationInterceptor();}
}

六丶添加业务代码

/*** @author xy丶* @version 1.0.0* @Date 2024/05/23 15:40**/
@RestController
@RequestMapping("/content/aiGlobalRate")
public class ProductController {@Autowiredprivate ProductService productService;/*** 查询所有*/@GetMapping("/selectAll")public List<Product> selectAll() {return productService.selectAll();}/*** 添加*/@GetMapping("/addProduct")public Boolean addProduct() {Product product = new Product();product.setProductName("我是产品！！！");product.setBigData("我是产品！fdgfjgjkbdshjfgldfnkknsfbndsknfdknsfhjdsm xzmn,hjzm cnbzgjcnqwklguasknfnasgud abjasjgdsal;kdiofgsfhdisufjs,bjbvm,kaskkn！！");product.setCreateTime(new Date());product.setBigData(JSONObject.valueToString(product));return productService.addProduct(product);}/*** 批量添加  有问题*/@GetMapping("/batchAdd")public Boolean batchAdd() {List<Product> products = new ArrayList<>();for (int i=0;i<=10;i++){Product product = new Product();product.setProductName("dsgdsg"+i+"放假时间！！！");products.add(product);}return productService.batchAdd(products);}/*** 查询单条*/@GetMapping("/getProductById")public Product getProductById() {return productService.getProductById(34);}/*** 查询目标数据*/@GetMapping("/getTargetProduct")public List<Product> getTargetProduct() {List<Integer> integers = Arrays.asList(23, 34, 5, 6, 7);return productService.getTargetProduct(integers);}/*** 条件查询数据*/@GetMapping("/findProduct")public List<Product> findProduct(String name) {return productService.findProduct(name);}/*** 分页查询*/@GetMapping("/productPage")public IPage<Product> productPage(Page page, String name) {return productService.productPage(page,name);}/*** 删除单条*/@GetMapping("/delById")public Boolean delById(Integer id) {return productService.delById(id);}/*** 批量删除*/@GetMapping("/batchDelById")public Boolean batchDelById(String ids) {List<String> strings = Arrays.asList(ids.split(","));return productService.batchDelById(strings);}//====增删改查 分页查询条件查询/*** 更新单条*/@GetMapping("/updateProduct")public Boolean updateProduct(Integer id,String name) {Product product = new Product();product.setId(id);product.setProductName(name);return productService.updateProduct(product);}/*** 批量更新*/@GetMapping("/batchUpdateProduct")public Boolean batchUpdateProduct() {List<Product> products = new ArrayList<>();Product product = new Product();product.setId(4);product.setProductName("dsjfds看难顶你是");Product product2 = new Product();product2.setId(5);product2.setProductName("大飞冠的返回");products.add(product);products.add(product2);return productService.batchUpdateProduct(products);}
}

public interface ProductService extends IService<Product> {List<Product> selectAll();Boolean addProduct(Product product);Boolean batchAdd(List<Product> products);Product getProductById(Integer i);List<Product> getTargetProduct(List<Integer> integers);List<Product> findProduct(String name);IPage<Product> productPage(Page page, String name);Boolean delById(Integer id);Boolean batchDelById(List<String> strings);Boolean updateProduct(Product product);Boolean batchUpdateProduct(List<Product> products);
}

@Service
@Slf4j
public class ProductServiceImpl extends ServiceImpl<ProductMapper, Product> implements ProductService {@Autowiredprivate ProductMapper productMapper;@Overridepublic List<Product> selectAll() {return productMapper.selectList(Wrappers.lambdaQuery());}@Overridepublic Boolean addProduct(Product product) {boolean save = save(product);log.info("current id====>"+product.getId());return save;}@Overridepublic Boolean batchAdd(List<Product> products) {boolean b = false;for (Product product : products) {b = save(product);log.info("current id====>"+product.getId());}return b;}@Overridepublic Product getProductById(Integer i) {return getById(i);}@Overridepublic List<Product> getTargetProduct(List<Integer> integers) {List<Product> products = list(Wrappers.<Product>lambdaQuery().in(Product::getId,integers));return products;}@Overridepublic List<Product> findProduct(String name) {List<Product> products = list(Wrappers.<Product>lambdaQuery().like(Strings.isNotBlank(name), Product::getProductName, name));return products;}@Overridepublic IPage<Product> productPage(Page page,String name) {IPage pageList = page(page, Wrappers.<Product>lambdaQuery().like(Strings.isNotBlank(name), Product::getProductName, name));return pageList;}@Overridepublic Boolean delById(Integer id) {return removeById(id);}@Overridepublic Boolean batchDelById(List<String> strings) {return removeByIds(strings);}@Overridepublic Boolean updateProduct(Product product) {return updateById(product);}@Overridepublic Boolean batchUpdateProduct(List<Product> products) {return updateBatchById(products);}}

@Mapper
public interface ProductMapper extends BaseMapper<Product> {}

七丶测试

八丶采坑，使用mybatis-plus批量插入保存报错

解决办法：当前程序使用DmJdbc驱动包版本比较旧（8.1.1.49），更换为较新版本（2021年下半年以后的驱动包版本）解决。

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