springboot+myBatisPlus+swagger2整合 +代码生成

首先在pom.xml中导入一下包
注spring的版本为2.5.5 不然会报错
UserDao 接口（pojo entity）
UserDaoImpl 实现类
UserService 业务接口
UserServiceImpl 业务实现类

        
            org.springframework.boot
            spring-boot-devtools
            runtime
            true
        

        
            com.baomidou
            mybatis-plus-boot-starter
            3.4.0
        

        
            com.baomidou
            mybatis-plus-generator
            3.4.0
        

        
            org.springframework.boot
            spring-boot-starter-freemarker
        
        
        
            org.apache.velocity
            velocity-engine-core
            2.2
        
        
        
            org.springframework.boot
            spring-boot-starter-thymeleaf
        
        
        
            io.springfox
            springfox-swagger2
            2.7.0
        

        
            io.springfox
            springfox-swagger-ui
            2.7.0
        
        
        
            org.apache.shiro
            shiro-spring
            1.4.0
        

        
            junit
            junit
            test
        
        
            javax.servlet
            javax.servlet-api
            4.0.1
        

        
            mysql
            mysql-connector-java
            runtime
        
        
            org.projectlombok
            lombok
            true
        

在application中配置

spring.profiles.active=dev
#dev 开发环境 pro运行 
server.port=8088
#数据源
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#修改连接的数据库database
spring.datasource.url=jdbc:mysql:///database ?createDatabaseIfNotExist=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=
#mp的数据日志输出
mybatis-plus.configuration.log-impl=org.apache.ibatis.logging.stdout.StdOutImpl
#json的时间格式配置:在返回json给前端时json的时区要设置
spring.jackson.date-format=yyyy-MM-dd HH:mm:ss
spring.jackson.time-zone=GMT+8
spring.main.allow-bean-definition-overriding=true

创建一个config包
创建一个mybatisConfig类

@Configuration
@EnableTransactionManagement
@MapperScan(basePackages = ("com.blog.demo.mapper*"))//mapper路径
public class MpConfig {  // 注册乐观锁插件
    @Bean
    public OptimisticLockerInnerInterceptor optimisticLockerInnerInterceptor(){return new OptimisticLockerInnerInterceptor();}
    // 分页插件
    @Bean
    public PaginationInterceptor paginationInterceptor() {
        return  new PaginationInterceptor();
    }
}

创建swaggerConfig类

@Configuration
@EnableSwagger2
public class SwaggerConfig {
    @Bean
    public Docket docket(){
        return new Docket(DocumentationType.SWAGGER_2);
    }
}

代码生成器（可以使用自定义生成模板，可以生成crud代码）
引用于：

https://blog.csdn.net/jjj___jjj/article/details/117172161

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.annotation.FieldFill;
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.po.TableFill;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.List;
class Generation {
//这部分需要根据实际情况更改
    private static final String dbName = "smbms";
    private static final String basePackageName = "com.blog.demo";
    private static final String driverClassName = "com.mysql.cj.jdbc.Driver";
//    private static final String driverClassName = "com.mysql.jdbc.Driver";
    private static final String dbUrl = "jdbc:mysql://127.0.0.1:3306/" + dbName + "?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8";
    private static final String dbUsername = "root";
    private static final String dbPassword = "";


    private static final String author = "YH";

    // 是否开启swagger日志
    private static final boolean useSwagger =true;
    // 是否覆盖
    private static final boolean isOverride = true;

    /**
     * 获取某个数据库中的所有表名
     * @param dbName
     * @return
     * @throws Exception
     */
    private static String[] getTables(String dbName) throws Exception {
        List tables = new ArrayList<>();

        Connection connection = null;
        PreparedStatement ps = null;
        ResultSet resultSet = null;
        try {
            Class.forName(driverClassName);
            connection = DriverManager.getConnection(dbUrl,dbUsername,dbPassword);
            String sql = "select table_name from information_schema.tables where table_schema=?";
            ps = connection.prepareStatement(sql);
            ps.setString(1,dbName);
            resultSet = ps.executeQuery();
            while (resultSet.next()) {
                tables.add(resultSet.getString("table_name"));
            }
            String[] result = tables.toArray(new String[tables.size()]);
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (resultSet != null) {
                try {
                    resultSet.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (ps != null) {
                try {
                    ps.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (connection != null) {
                try {
                    connection.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        throw new Exception("数据库连接异常！");
    }

    /**
     * 直接获取数据库中的所有表名然后自动生成
     * 自动生成entity、mapper、service、controller的代码
     * @throws Exception
     */
    private static void generateAllInfo() throws Exception {
        // 代码生成器
        AutoGenerator mpg = new AutoGenerator();

        // 全局配置
        GlobalConfig gc = new GlobalConfig();
        String projectPath = System.getProperty("user.dir");
        gc.setOutputDir(projectPath + "/src/main/java");
        gc.setAuthor(author);
        gc.setOpen(false);
        gc.setSwagger2(useSwagger);      //实体属性 Swagger2 注解
        gc.setFileOverride(isOverride);  // 是否覆盖
        gc.setServiceName("%sService"); //去Service的I前缀
        mpg.setGlobalConfig(gc);

        // 数据源配置
        DataSourceConfig dsc = new DataSourceConfig();
        dsc.setUrl(dbUrl);
        dsc.setDriverName(driverClassName);
        dsc.setUsername(dbUsername);
        dsc.setPassword(dbPassword);
        dsc.setDbType(DbType.MYSQL);
        mpg.setDataSource(dsc);

        // 包配置
        PackageConfig pc = new PackageConfig();
        pc.setModuleName(null);
        pc.setParent(basePackageName);
        mpg.setPackageInfo(pc);

        // 自定义配置
        InjectionConfig cfg = new InjectionConfig() {
            @Override
            public void initMap() {}
        };

        // 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 focList = new ArrayList<>();
        // 自定义配置会被优先输出 不同的模板用用不同的文件 ftl vm
//        focList.add(new FileOutConfig("/templates/controller.java.vm") {
//            @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.getEntityName() + "Mapper" + StringPool.DOT_XML;
//            }
//        });

        cfg.setFileOutConfigList(focList);

        mpg.setCfg(cfg);

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

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

        // 策略配置
        StrategyConfig strategy = new StrategyConfig();
        strategy.setNaming(NamingStrategy.underline_to_camel);
        strategy.setColumnNaming(NamingStrategy.underline_to_camel);
        strategy.setEntityLombokModel(true);
        strategy.setRestControllerStyle(true);
        strategy.setInclude(getTables(dbName));
        strategy.setControllerMappingHyphenStyle(true);
        mpg.setStrategy(strategy);
        mpg.setTemplateEngine(new FreemarkerTemplateEngine());

//        strategy.setLogicDeleteFieldName("deleted");   //逻辑删除
//        //自动填充配置
//        TableFill gmtCreate = new TableFill("gmt_create", FieldFill.INSERT);    //创建时间，新增时自动填充
//        TableFill gmtModified = new TableFill("gmt_modified", FieldFill.INSERT_UPDATE); //修改时间，新增和修改时自动填充
//        ArrayList tableFills = new ArrayList<>();
//        tableFills.add(gmtCreate);
//        tableFills.add(gmtModified);
//        strategy.setTableFillList(tableFills);
//
//        //乐观锁配置
//        strategy.setVersionFieldName("version");

        mpg.execute();
    }

    public static void main(String[] args) {
        try {
            generateAllInfo();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

    public static void main(String[] args) {
        ApplicationContext context = SpringApplication.run(DemoApplication.class, args);
        String serverPort = context.getEnvironment().getProperty("server.port");
        log.info("SENS started at http://localhost:" + serverPort);

运行代码生成器
启动项目后访问localhost:port/swagger-ui.html即可进入swagger的UI界面