达梦数据库的增删改查和springboot 连接达梦数据库_达梦数据库增删改查

• 模式名称为test，表名为battle
• 达梦数据库表数据的插入

INSERT INTO test.battle(battle."id","nickname","position") VALUES (7,'韩信','打野');

• 达梦数据库表数据的修改

update "TEST"."BATTLE" SET "nickname"='关羽' WHERE battle."id"=2;

• 达梦数据库表数据的查找

select * FROM "TEST"."BATTLE";

• 达梦数据库表数据的删除

delete FROM "TEST"."BATTLE" WHERE battle."id"=7

达梦数据库插入或者修改，以及删除数据后要查询数据，刷新数据表格提交事务，否则数据不会更新。

spring boot +mybatis plus 项目构建

1.pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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 https://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>2.7.4</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>dmDemo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>dmDemo</name>
    <description>dmDemo</description>
    <properties>
        <java.version>1.8</java.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>
 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- 引入jdbc支持 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jdbc</artifactId>
        </dependency>
        <!-- 引入web支持 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <!-- 添加 dm8 jdbc jar 包依赖-->
        <!-- https://mvnrepository.com/artifact/com.dameng/Dm8JdbcDriver18 -->
        <dependency>
            <groupId>com.dameng</groupId>
            <artifactId>Dm8JdbcDriver18</artifactId>
            <version>8.1.0.157</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.4.1</version>
        </dependency>
    </dependencies>
 
    <repositories>
        <!-- 使用阿里云镜像仓库用来提高下载速度-->
        <repository>
            <id>aliyun</id>
            <name>aliyun Repository</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <!-- 使用 DM 的镜像仓库来下载驱动包-->
        <repository>
            <id>dc</id>
            <name>dc Repository</name>
            <url>http://119.96.92.173:8181/repository/maven-releases/</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
 
    <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>
    </build>
 
</project>

2.application.properites文件

spring.datasource.url=jdbc:dm://localhost:5236?SCHEMA=TEST
spring.datasource.username=SYSDBA
spring.datasource.password=SYSDBA
spring.datasource.driver-class-name=dm.jdbc.driver.DmDriver

3.实体类

package com.example.dmdemo.entity;
 
import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
 
/**
 * @author welcome
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
@TableName(value = "\"TEST\".\"battle\"")
public class Battle {
    @TableId(value = "id",type = IdType.AUTO)
    private Integer id;
    @TableField("nickname")
    private String nickname;
    @TableField("position")
    private String position;
}

4.dao层

package com.example.dmdemo.mapper;
 
import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.example.dmdemo.entity.Battle;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
 
 
/**
 * @author welcome
 */
@Mapper
public interface BattleMapper extends BaseMapper<Battle> {
    @Insert("INSERT INTO test.battle(battle.\"id\",\"nickname\",\"position\") VALUES (#{id},#{nickname},#{position})")
    int insertData(Battle battle);
}

5.测试类

package com.example.dmdemo;
 
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.example.dmdemo.entity.Battle;
import com.example.dmdemo.mapper.BattleMapper;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
 
import javax.annotation.Resource;
import java.util.List;
 
@SpringBootTest
class DmDemoApplicationTests {
    @Resource
    BattleMapper mapper;
    @Test
    void contextLoads() {
        QueryWrapper wrapper=new QueryWrapper<>();
 
        List list = mapper.selectList(wrapper);
        System.out.println(list);
    }
 
    @Test
    void test1(){
        Battle battle=new Battle(12,"金蟾","法师");
         mapper.insertData(battle);
        System.out.println();
    }
    @Test
    void test2(){
        Battle battle=new Battle();
        battle.setId(1);
        battle.setNickname("赵怀真");
        battle.setPosition("战士");
        int i = mapper.updateById(battle);
    }
    @Test
    void test3(){
        int i = mapper.deleteById(11);
 
    }
 
}

遇到的问题

### Cause: dm.jdbc.driver.DMException: 第1 行附近出现错误:
无效的表或视图名[battle]

原因：注解的表名，没有模式

错误写法：

@TableName("battle")

正确写法：

@TableName(value = "\"TEST\".\"battle\"")

问题2.basemapper自带的插入语句无法使用

解决方式：自己写一个插入语句

项目详情参考：mybatis plus+dm: mybatis plus连接达梦数据库 (gitee.com)