mybatisplus实践

2023-11-15 08:33:40

需要引入的依赖，我这里集成了nacos,openfeign等。
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>
    <groupId>com.alibaba.web</groupId>
    <artifactId>alibaba-feign</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>alibaba-feign</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <spring-boot.version>2.4.2</spring-boot.version>
        <spring-cloud-alibaba.version>2021.1</spring-cloud-alibaba.version>
        <spring-cloud.version>2020.0.1</spring-cloud.version>
        <mybatis-plus.version>3.4.1</mybatis-plus.version>
        <velocity.version>2.2</velocity.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
        </dependency>

        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-boot-starter</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-generator</artifactId>
            <version>${mybatis-plus.version}</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.velocity</groupId>
            <artifactId>velocity-engine-core</artifactId>
            <version>${velocity.version}</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.71</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>${spring-cloud.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-dependencies</artifactId>
                <version>${spring-boot.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>${spring-cloud-alibaba.version}</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.8.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <version>2.3.7.RELEASE</version>
                <configuration>
                    <mainClass>com.alibaba.web.alibabafeign.AlibabaFeignApplication</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <id>repackage</id>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

配置文件代码application.properties

# 应用名称
spring.application.name=alibaba-provide
server.port=6001
# Nacos帮助文档: https://nacos.io/zh-cn/docs/concepts.html
# Nacos认证信息
#spring.cloud.nacos.discovery.username=nacos
#spring.cloud.nacos.discovery.password=nacos
# Nacos 服务发现与注册配置，其中子属性 server-addr 指定 Nacos 服务器主机和端口
spring.cloud.nacos.discovery.server-addr=192.168.206.129:8848
# 注册到 nacos 的指定 namespace，默认为 public
#spring.cloud.nacos.discovery.namespace=public


spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://10.12.68.17:3306/o2m-oc-pop?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true
spring.datasource.username=aaaa
spring.datasource.password=bbbb

#开启SQL语句打印
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl

逆向工程执行代码CodeGenerator.java

package com.alibaba.web.alibabafeign.util;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.core.toolkit.StringPool;
import com.baomidou.mybatisplus.generator.AutoGenerator;
import com.baomidou.mybatisplus.generator.InjectionConfig;
import com.baomidou.mybatisplus.generator.config.*;
import com.baomidou.mybatisplus.generator.config.builder.ConfigBuilder;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.DateType;
import com.baomidou.mybatisplus.generator.config.rules.FileType;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;

import java.io.File;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * @date 2020/10/24 15:21
 */
public class CodeGenerator {
    public static void main(String[] args) {

        //设置项目路径
        String projectPath =  System.getProperty("user.dir") + "/alibaba-feign";
        String pkgName = "alibabafeign";
        String pkgParent = "com.alibaba.web";

        String url = "jdbc:mysql://10.12.68.17:3306/o2m-oc-pop?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull&allowMultiQueries=true";
        String userName = "aaaa";
        String password = "bbbb";

        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();
        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor("mybatis-plus");
        gc.setOpen(false);
        gc.setEntityName("Do%s");
        gc.setIdType(IdType.INPUT);
        gc.setDateType(DateType.ONLY_DATE);
//        gc.setMapperName("%sDao");
//        gc.setXmlName("%sDao");
        // gc.setSwagger2(true); 实体属性 Swagger2 注解
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl(url);
        // dsc.setSchemaName("public");
        dsc.setDriverName("com.mysql.jdbc.Driver");
        dsc.setUsername(userName);
        dsc.setPassword(password);
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
//        pc.setModuleName(scanner("模块名"));
        pc.setModuleName(pkgName);
        pc.setParent(pkgParent);
        pc.setEntity("entity");

        mpg.setPackageInfo(pc);
        pc.setMapper("mapper");

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {
                // to do nothing
            }
        };

        // 如果模板引擎是 freemarker
//        String templatePath = "/templates/mapper.xml.ftl";
        // 如果模板引擎是 velocity
         String templatePath = "/templates/mapper.xml.vm";

        // 自定义输出配置
        List<FileOutConfig> focList = new ArrayList<>();
        // 自定义配置会被优先输出
        focList.add(new FileOutConfig(templatePath) {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 自定义输出文件名 ， 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化！！
                return projectPath + "/src/main/resources/mapper/" +
                        tableInfo.getMapperName() + StringPool.DOT_XML;
            }
        });
        List<FileType> ignoreList = Arrays.asList(FileType.CONTROLLER, FileType.SERVICE, FileType.SERVICE_IMPL);
        cfg.setFileCreate(new IFileCreate() {
            @Override
            public boolean isCreate(ConfigBuilder configBuilder, FileType fileType, String filePath) {
                // 判断自定义文件夹是否需要创建
//                checkDir(filePath);
                // 已经生成 mapper 文件判断存在，不想重新生成返回 false
                if(!ignoreList.contains(fileType) && !new File(filePath).exists()){
                    System.out.println(filePath);
                    checkDir(filePath);
                // 允许生成模板文件
                    return true;
                }
                return false;
            }
        });
        cfg.setFileOutConfigList(focList);
        mpg.setCfg(cfg);

        // 配置模板
        TemplateConfig templateConfig = new TemplateConfig();

        // 配置自定义输出模板
        //指定自定义模板路径，注意不要带上.ftl/.vm, 会根据使用的模板引擎自动识别
        // templateConfig.setEntity("templates/entity2.java");
        // templateConfig.setService();
        // templateConfig.setController();

        templateConfig.setXml(null);
        mpg.setTemplate(templateConfig);

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
//        strategy.setInclude(new String[]{"plf_sys_func_package"}); //生成指定表
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
//        strategy.setSuperEntityClass("你自己的父类实体,没有就不用设置!");
        strategy.setEntityLombokModel(true);
        strategy.setRestControllerStyle(true);
        // 公共父类
//        strategy.setSuperControllerClass("你自己的父类控制器,没有就不用设置!");
        // 写于父类中的公共字段
//        strategy.setSuperEntityColumns("id");
//        strategy.setInclude(scanner("表名，多个英文逗号分割").split(","));
        // 设置表前缀过滤
//        strategy.setLikeTable(new LikeTable("t_", SqlLike.RIGHT));
        strategy.setControllerMappingHyphenStyle(true);
//        strategy.setTablePrefix("t_");
        mpg.setStrategy(strategy);
//        mpg.setTemplateEngine(new FreemarkerTemplateEngine());
        mpg.execute();
    }
}

执行生产代码后，可以生产entity,mapper.java,mapper.xml
service代码

@Service("popBillImportService")
public class PopBillImportServiceImpl implements PopBillImportService {

    @Resource
    private PopBillImportMapper popBillImportMapper;

    @Override
    public DoPopBillImport obtainById(Long id) {
        return popBillImportMapper.selectById(id);
    }

    @Override
    public List<DoPopBillImport> listPopBill(DoPopBillImport doPopBillImport){
        QueryWrapper<DoPopBillImport> ew = new QueryWrapper<>();
        ew.eq("outer_order_id", doPopBillImport.getOuterOrderId());
        return popBillImportMapper.selectList(ew);
    }

}

执行结果

https://mp.weixin.qq.com/s/Xe5lfV7NgbIZI2VOIY_knQ

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