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SpringBoot MyBatis Plus 整合 达梦数据库

SpringBoot MyBatis Plus 整合 达梦数据库


 

一、前提条件

本篇博客以访问本地达梦数据库(DM8)为基础进行演示。(前提:本地已经安装了 DM8 数据库!)

关于 Windows 安装达梦数据库,请参考博客:Windows 安装 达梦数据库

关于 Docker 安装达梦数据库,请参考博客:Docker 安装 达梦数据库

关于 JDBC 方式操作达梦数据库,请参考博客:JDBC 方式操作 达梦数据库

关于 MyBatis Plus 操作达梦数据库,请参考博客:MyBatis Plus 操作 达梦数据库

关于 Spring 操作达梦数据库,请参考博客:Spring 操作 达梦数据库

 

二、准备 DM8 的驱动包

https://eco.dameng.com/download/ 中下载 达梦JDBC 驱动包,如下:

 

JDK 1.8 对应的 JDBC 驱动包为:DmJdbcDriver18.jar

 

三、SpringBoot 操作 达梦数据库

1、创建 SpringBoot 工程 dm-springboot

工程名根据实际情况命名,此处 dm-springboot 仅作为示例参考,工程结构如下:

 

2、工程文件

1)BigDataController.java

package com.miracle.dm.controller;

import com.miracle.dm.pojo.BigData;
import com.miracle.dm.service.BigDataService;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author: Miracle Luna
 * @date: 2023/10/17 13:33
 * @description:
 */
@RestController
@RequestMapping("/bigData")
public class BigDataController {

    @Resource
    private BigDataService bigDataService;

    @GetMapping
    public List<BigData> findAll() {
        return bigDataService.selectList();
    }
}

 

2)ProductCategoryController.java

package com.miracle.dm.controller;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.miracle.dm.pojo.ProductCategory;
import com.miracle.dm.service.ProductCategoryService;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author: Miracle Luna
 * @date: 2023/10/17 13:33
 * @description:
 */
@RestController
@RequestMapping("/productCategory")
public class ProductCategoryController {

    @Resource
    private ProductCategoryService productCategoryService;

    @GetMapping
    public List<ProductCategory> findAll(){
//        return productCategoryService.selectList();
        return productCategoryService.getBaseMapper().selectList(Wrappers.emptyWrapper());
    }

    @GetMapping("/insert/{name}")
    public String insert(@PathVariable("name") String name){
        String result = "insert successfully";

        try {
            productCategoryService.insert(new ProductCategory(null, name));
        } catch (Exception e) {
            result = "insert error: " + e.getMessage();
        }

        return result;
    }

    @GetMapping("/page")
    public Page<ProductCategory> findPage(@RequestParam Integer pageNum, @RequestParam Integer pageSize){
        return productCategoryService.page(new Page(pageNum, pageSize), Wrappers.emptyWrapper());
    }
}

 

3)BigDataMapper.java

package com.miracle.dm.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.miracle.dm.pojo.BigData;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface BigDataMapper extends BaseMapper<BigData> {
}

 

4)ProductCategoryMapper.java

package com.miracle.dm.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.miracle.dm.pojo.ProductCategory;
import org.apache.ibatis.annotations.Mapper;

@Mapper
public interface ProductCategoryMapper extends BaseMapper<ProductCategory> {
}

 

5)BigData.java

package com.miracle.dm.pojo;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.AllArgsConstructor;
import lombok.Data;

@Data
@AllArgsConstructor
@TableName(value = "PRODUCTION.BIG_DATA")
public class BigData {
    @TableId(value = "id", type = IdType.AUTO)
    private Long id;
    private byte[] photo; //mybatis 将 Image 和 Blob 映射成 byte[]
    private byte[] describe;
    private String txt; //mybatis 将 Clob 映射成 String

}

 

6)ProductCategory.java

package com.miracle.dm.pojo;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import lombok.AllArgsConstructor;
import lombok.Data;

@Data
@AllArgsConstructor
@TableName("PRODUCTION.PRODUCT_CATEGORY")
public class ProductCategory {
    @TableId(value = "product_categoryid", type = IdType.AUTO)
    private Integer product_categoryid;
    private String name;
}

 

7)BigDataServiceImpl.java

package com.miracle.dm.service.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.miracle.dm.mapper.BigDataMapper;
import com.miracle.dm.pojo.BigData;
import com.miracle.dm.service.BigDataService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

/**
 * @author: Miracle Luna
 * @date: 2023/10/17 13:36
 * @description:
 */
@Service
public class BigDataServiceImpl extends ServiceImpl<BigDataMapper, BigData> implements BigDataService {

    @Resource
    private BigDataMapper bigDataMapper;

    @Override
    public List<BigData> selectList() {
        return bigDataMapper.selectList(Wrappers.emptyWrapper());
    }

}

 

8)ProductCategoryServiceImpl.java

package com.miracle.dm.service.impl;

import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.miracle.dm.mapper.ProductCategoryMapper;
import com.miracle.dm.pojo.ProductCategory;
import com.miracle.dm.service.ProductCategoryService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

/**
 * @author: Miracle Luna
 * @date: 2023/10/17 13:36
 * @description:
 */
@Service
public class ProductCategoryServiceImpl extends ServiceImpl<ProductCategoryMapper, ProductCategory> implements ProductCategoryService {

    @Resource
    private ProductCategoryMapper productCategoryMapper;

//    @Override
//    public List<ProductCategory> selectList() {
////        Wrapper<ProductCategory> wrapper = new QueryWrapper<>();
////        return productCategoryMapper.selectList(wrapper);
//        return productCategoryMapper.selectList(Wrappers.emptyWrapper());
//    }

    @Override
    public void insert(ProductCategory category) {
        productCategoryMapper.insert(category);
    }

//    @Override
//    public Page<ProductCategory> getPage() {
//        return productCategoryMapper.selectPage(null, Wrappers.emptyWrapper());
//    }
}

 

9)BigDataService.java

package com.miracle.dm.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.miracle.dm.pojo.BigData;

import java.util.List;

/**
 * @author: Miracle Luna
 * @date: 2023/10/17 13:34
 * @description:
 */
public interface BigDataService extends IService<BigData> {
    List<BigData> selectList();
}

 

10)ProductCategoryService.java

package com.miracle.dm.service;

import com.baomidou.mybatisplus.extension.service.IService;
import com.miracle.dm.pojo.ProductCategory;

/**
 * @author: Miracle Luna
 * @date: 2023/10/17 13:34
 * @description:
 */
public interface ProductCategoryService extends IService<ProductCategory> {
//    List<ProductCategory> selectList();
    void insert(ProductCategory category);
//    Page<ProductCategory> getPage();
}

 

11)DmApplication.java

package com.miracle.dm;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DmApplication {

    public static void main(String[] args) {
        SpringApplication.run(DmApplication.class, args);
    }

}

 

12)MybatisPlusConfig.java

package com.miracle.dm;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * @author: Miracle Luna
 * @date: 2023/10/17 13:36
 * @description:
 */
@Configuration
@MapperScan("com.miracle.dm.mapper")
public class MybatisPlusConfig {

    /**
     * 新的分页插件,一缓和二缓遵循mybatis的规则,需要设置 MybatisConfiguration#useDeprecatedExecutor = false 避免缓存出现问题(该属性会在旧插件移除后一同移除)
     * 如果不加如下配置,分页查询会出现异常
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        // DM("dm", "达梦数据库")
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.DM));
        return interceptor;
    }
}

注意:如果不配置该类,易引起分页查询异常问题。

具体现象,请参考博客:MyBatis Plus 达梦数据库 分页查询异常问题 。

 

13)BigDataMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--命名空间会映射到接口-->
<mapper namespace="dameng.dao.BigDataMapper">
</mapper>

 

14)ProductCategoryMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--命名空间  会映射到 接口-->
<mapper namespace="dameng.dao.ProductCategoryMapper">
</mapper>

 

15)application.yml

server:
    port:8080

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

 

16)logback-spring.xml

SpringBoot 默认使用的是 logback 方式记录日志信息。

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="false">
    <!--定义日志文件的存储地址 -->
    <property name="LOG_HOME" value="./logs"/>

    <property name="COLOR_PATTERN"
              value="%black(%contextName-) %red(%d{yyyy-MM-dd HH:mm:ss}) %green([%thread]) %highlight(%-5level) %boldMagenta( %replace(%caller{1}){'\t|Caller.{1}0|\r\n', ''})- %gray(%msg%xEx%n)"/>
    <!-- 控制台输出 -->
    <appender name="STDOUT"
              class="ch.qos.logback.core.ConsoleAppender">
        <encoder
                class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--格式化输出:%d表示日期,%thread表示线程名,%-5level:级别从左显示5个字符宽度%msg:日志消息,%n是换行符 -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50}:%L - %msg%n</pattern>
        </encoder>
    </appender>

    <!-- 按照每天生成日志文件 -->
    <appender name="FILE"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">
            <!--日志文件输出的文件名 -->
            <FileNamePattern>${LOG_HOME}/dm-springboot.%d{yyyy-MM-dd}.%i.log</FileNamePattern>
            <!--日志文件保留天数 -->
            <MaxHistory>30</MaxHistory>
            <!--用来指定日志文件的上限大小,那么到了这个值,就会删除旧的日志-->
            <totalSizeCap>1GB</totalSizeCap>
            <!--日志文件最大的大小 -->
            <MaxFileSize>30MB</MaxFileSize>
        </rollingPolicy>
        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
            <!--格式化输出:%d表示日期,%thread表示线程名,%-5level:级别从左显示5个字符宽度%msg:日志消息,%n是换行符 -->
            <pattern>%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{50}:%L - %msg%n</pattern>
        </encoder>
    </appender>

    <!--mybatis log configure -->
    <logger name="com.apache.ibatis" level="TRACE"/>
    <logger name="java.sql.Connection" level="DEBUG"/>
    <logger name="java.sql.Statement" level="DEBUG"/>
    <logger name="java.sql.PreparedStatement" level="DEBUG"/>

    <!-- 日志输出级别 -->
    <root level="INFO">
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="FILE"/>
    </root>

</configuration>

 

17)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>2.7.14</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.miracle</groupId>
    <artifactId>dm-springboot</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>dm-springboot</name>
    <description>Demo project for Spring Boot</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-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- MybatisPlus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>3.5.3.2</version>
        </dependency>

        <!-- 达梦数据库 -->
        <dependency>
            <groupId>dm.jdbc</groupId>
            <artifactId>DmJdbcDriver18</artifactId>
            <version>1.0</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.7.14</version>
                <configuration>
                    <excludes>
                        <exclude>
                            <groupId>org.projectlombok</groupId>
                            <artifactId>lombok</artifactId>
                        </exclude>
                    </excludes>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

注意: 此处达梦数据库的 JDBC 驱动包 DmJdbcDriver18.jar,可以通过在工程目录下创建 lib 目录,将 jar copy到 lib,然后将 lib 目录设置添加到 Libararies 的方式,但是项目整体打包的时候,lib 目录下的 DmJdbcDriver18.jar 不会被打入到工程包中;

因此,需要将 DmJdbcDriver18.jar 添加到本地的 maven 仓库中,从本地引用 DmJdbcDriver18.jar 的依赖,在 maven 打包的时候,可以正常被打入到整体包中。

效果如下:

关于达梦数据库驱动包安装到本地 Maven 仓库的具体操作步骤,请参考博客:将达梦数据库的JDBC驱动包 DmJdbcDriver18.jar 安装到本地 Maven 仓库

 

3、运行结果

1)运行启动类 DmApplicatin.java

 

在工程目录下,自动生成日志目录 logs 和日志文件 dm-springboot.2023-10-18.0.log,效果如下:

 

2)浏览器中调用查询接口

示例1:

http://localhost:8080/bigData

 

执行效果如下:

 

示例2:

http://localhost:8080/productCategory

 

执行效果如下:

 

3)浏览器中调用插入接口

http://localhost:8080/productCategory/insert/测试

 

执行效果如下:

 

4)浏览器中调用插入接口

http://localhost:8080/productCategory/page?pageNum=1&pageSize=3

 

执行效果如下:

 

 

PS:

DbType.java 文件中枚举出了 MyBatis Plus 目前所支持的所有数据库类型,文件内容如下:

package com.baomidou.mybatisplus.annotation;

public enum DbType {
    MYSQL("mysql", "MySql数据库"),
    MARIADB("mariadb", "MariaDB数据库"),
    ORACLE("oracle", "Oracle11g及以下数据库(高版本推荐使用ORACLE_NEW)"),
    ORACLE_12C("oracle12c", "Oracle12c+数据库"),
    DB2("db2", "DB2数据库"),
    H2("h2", "H2数据库"),
    HSQL("hsql", "HSQL数据库"),
    SQLITE("sqlite", "SQLite数据库"),
    POSTGRE_SQL("postgresql", "Postgre数据库"),
    SQL_SERVER2005("sqlserver2005", "SQLServer2005数据库"),
    SQL_SERVER("sqlserver", "SQLServer数据库"),
    DM("dm", "达梦数据库"),
    XU_GU("xugu", "虚谷数据库"),
    KINGBASE_ES("kingbasees", "人大金仓数据库"),
    PHOENIX("phoenix", "Phoenix HBase数据库"),
    GAUSS("zenith", "Gauss 数据库"),
    CLICK_HOUSE("clickhouse", "clickhouse 数据库"),
    GBASE("gbase", "南大通用(华库)数据库"),
    GBASE_8S("gbase-8s", "南大通用数据库 GBase 8s"),
    /** @deprecated */
    @Deprecated
    GBASEDBT("gbasedbt", "南大通用数据库"),
    /** @deprecated */
    @Deprecated
    GBASE_INFORMIX("gbase 8s", "南大通用数据库 GBase 8s"),
    SINODB("sinodb", "星瑞格数据库"),
    OSCAR("oscar", "神通数据库"),
    SYBASE("sybase", "Sybase ASE 数据库"),
    OCEAN_BASE("oceanbase", "OceanBase 数据库"),
    FIREBIRD("Firebird", "Firebird 数据库"),
    HIGH_GO("highgo", "瀚高数据库"),
    CUBRID("cubrid", "CUBRID数据库"),
    GOLDILOCKS("goldilocks", "GOLDILOCKS数据库"),
    CSIIDB("csiidb", "CSIIDB数据库"),
    SAP_HANA("hana", "SAP_HANA数据库"),
    IMPALA("impala", "impala数据库"),
    VERTICA("vertica", "vertica数据库"),
    XCloud("xcloud", "行云数据库"),
    REDSHIFT("redshift", "亚马逊redshift数据库"),
    OPENGAUSS("openGauss", "华为 opengauss 数据库"),
    TDENGINE("TDengine", "TDengine数据库"),
    INFORMIX("informix", "Informix数据库"),
    UXDB("uxdb", "优炫数据库"),
    LEALONE("lealone", "Lealone数据库"),
    OTHER("other", "其他数据库");

    private final String db;
    private final String desc;

    public static DbType getDbType(String dbType) {
        DbType[] var1 = values();
        int var2 = var1.length;

        for(int var3 = 0; var3 < var2; ++var3) {
            DbType type = var1[var3];
            if (type.db.equalsIgnoreCase(dbType)) {
                return type;
            }
        }

        return OTHER;
    }

    public String getDb() {
        return this.db;
    }

    public String getDesc() {
        return this.desc;
    }

    private DbType(final String db, final String desc) {
        this.db = db;
        this.desc = desc;
    }
}

其中,达梦数据库 对应的枚举值为 DM

 

posted @ 2023-10-17 19:16  龙凌云端  阅读(7768)  评论(0编辑  收藏  举报