<!--Spring Boot的啟動(dòng)依賴-->
<dependency>
	<groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
</dependency>

<!--Mybatis-plus啟動(dòng)依賴-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>3.5.2</version>
</dependency>

<!--Mybatis-plus逆向生成器依賴-->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-generator</artifactId>
    <version>3.4.1</version>
</dependency>

<!--數(shù)據(jù)庫連接依賴-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>

<!--Lombok依賴-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>

<!--Mybatis-plus逆向生成器的Freemarker模板引擎-->
<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
</dependency>

public class MybatisPlusGenerate {

    private static Scanner scanner = new Scanner(System.in);
    // 獲得當(dāng)前項(xiàng)目的路徑，如上圖就是 F:stady_program/Mybatis_plus逆向工程
    private final static String PROJECT_PATH = System.getProperty("user.dir");
    
}

 public static void scannerTableName(String parentPackageName){
        List<String> tableList = new ArrayList<>(); // 使用集合來存儲(chǔ)用戶輸入的多個(gè)表的名稱
        System.out.println("<=================表名列表===============>");
        while(!scanner.hasNext("end")){ // 當(dāng)用戶輸入end后結(jié)束輸入
            String tableName = scanner.next();
            if(tableName.equals("")){
                throw new RuntimeException("所輸入的表名不合法");
            }
            tableList.add(tableName); //將表名添加到集合中。
        }
        // 通過表名和當(dāng)前項(xiàng)目的目錄來生成相應(yīng)的包和類。
        for(String name : tableList) generateInformationByTableName(parentPackageName,name);
  }

 private static DataSourceConfig dataSourceConfig(){
        DataSourceConfig dataSourceConfig = new DataSourceConfig();
        dataSourceConfig.setUrl("jdbc:mysql://localhost:3306/mybatis?useUnicode=true&useSSL=false&serverTimezone=Asia/Shanghai")
                .setUsername("root")
                .setPassword("123456")
                .setDriverName("com.mysql.cj.jdbc.Driver").setDbType(DbType.MYSQL);

        return dataSourceConfig;
 }

 private static GlobalConfig globalConfig(){
        GlobalConfig globalConfig = new GlobalConfig();
        globalConfig.setOutputDir(PROJECT_PATH + "/src/main/java")// 輸出文件路徑
                .setAuthor("Time Travel")// 設(shè)置作者名字
                .setOpen(false)// 是否打開資源管理器
                .setFileOverride(true)// 是否覆蓋原來生成的
                .setIdType(IdType.AUTO)// 主鍵策略
                .setBaseResultMap(true)// 生成resultMap
                .setDateType(DateType.ONLY_DATE) // 設(shè)置時(shí)間格式，采用Date
                .setServiceName("%sService");// 生成的service接口名字首字母是否為I，這樣設(shè)置就沒有I
        //setBaseColumnList(true)  XML中生成基礎(chǔ)列
        return globalConfig;
 }

    private static PackageConfig packageConfig(String fatherPackageName){
        PackageConfig packageConfig = new PackageConfig();
        packageConfig.setParent(fatherPackageName) // 配置指定項(xiàng)目中各層的名稱
                .setController("controller") // Controller層
                .setEntity("entity") // 實(shí)體層（pojo層)
                .setMapper("dao") // Dao 層
                .setService("service") // service層
                .setServiceImpl("service.serviceImpl"); // ServiceImp層

        return packageConfig;
    }

   private static StrategyConfig strategyConfig (String tableName){
        StrategyConfig strategyConfig = new StrategyConfig();
        strategyConfig.setCapitalMode(true)// 開啟全局大寫命名
               .setInclude(tableName)// 設(shè)置要映射的表
               .setNaming(NamingStrategy.underline_to_camel)// 下劃線到駝峰的命名方式
               .setColumnNaming(NamingStrategy.underline_to_camel)// 下劃線到駝峰的命名方式
               .setEntityLombokModel(true)// 是否使用lombok
               .setRestControllerStyle(true)// 是否開啟rest風(fēng)格
               .setTablePrefix("t_") // 去除前綴
               .setControllerMappingHyphenStyle(true); // localhost:8080/hello_a_2

        return strategyConfig;
   }

 private static InjectionConfig injectionConfig(){
        InjectionConfig injectionConfig = new InjectionConfig() {
            @Override
            public void initMap() {
                this.setMap(new HashMap<>()); // 實(shí)現(xiàn)InjectionConfig抽象類就需要初始化一個(gè)Map集合
            }
        };
        List<FileOutConfig> fileOutConfigList = new ArrayList<>();
        // 根據(jù)/templates/mapper.xml.ftl規(guī)則在指定的位置生成Mapper文件，可以在多個(gè)地方生成。
        fileOutConfigList.add(new FileOutConfig("/templates/mapper.xml.ftl") {
            @Override
            public String outputFile(TableInfo tableInfo) {
                // 返回Mapper文件的絕對(duì)路徑
                String path = PROJECT_PATH + "/src/main/resources/mapper/" +
                        tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;
                return path;
            }
        });
        // 將對(duì)Mapper文件的配置添加到文件輸出對(duì)象中
        injectionConfig.setFileOutConfigList(fileOutConfigList);
        return injectionConfig;
   }

	// 最簡(jiǎn)單的配置
   private static TemplateConfig templateConfig() {
        TemplateConfig templateConfig = new TemplateConfig();

        return templateConfig.setXml(null);
   }

	// 復(fù)雜點(diǎn)的配置
	  private static TemplateConfig templateConfig() {
        TemplateConfig templateConfig = new TemplateConfig();
        templateConfig.setController("templates/controller.java")
                .setEntity("templates/entity.java")
                .setService("templates/service.java")
                .setServiceImpl("templates/serviceImpl.java")
                .setMapper("templates/mapper.java")
                .setXml(null);
        return templateConfig;
   }

  // 判斷輸入的父項(xiàng)目是否存在
   private static boolean parentPackageExits(String project, String parentPackageName){
        StringBuilder path = new StringBuilder(PROJECT_PATH);
        if(!"".equals(project) && project != null){
            path.append("/" + project);
        }
        path.append(("/src/main/java/" + parentPackageName).replace(".","/"));
        File file = new File(path.toString());
        return file.exists();
   }

// 執(zhí)行、測(cè)試
    public static void main(String[] args) {
        System.out.print("父包名稱: ");
        String input = scanner.next();
        if(!parentPackageExits(null,input)){
            throw new RuntimeException("輸入的父包名不存在或者輸入錯(cuò)誤,請(qǐng)重新輸入父包名");
        }
        scannerTableName(input);
    }