JHipster导入JDL文件引发大量配置冲突问题咨询

我是JHipster 7.9.3版本的新手，创建了一个以MySQL为数据库、Angular为前端的单体应用，创建时未选择缓存选项。导入一份极简配置的JDL文件后，出现大量文件冲突，且导入操作将开发数据库改为H2并启用ehcache，这与我的初始配置不符。冲突涉及多个核心文件，现咨询该问题的原因，以及如何配置让JDL导入功能不修改数据库和缓存配置。

初始应用创建配置 #

? Which *type* of application would you like to create? Monolithic application (recommended for simple projects)
? What is the base name of your application? jdlimporttest
? Do you want to make it reactive with Spring WebFlux? No
? What is your default Java package name? com.mycompany.myapp
? Which *type* of authentication would you like to use? JWT authentication (stateless, with a token)
? Which *type* of database would you like to use? SQL (H2, PostgreSQL, MySQL, MariaDB, Oracle, MSSQL)
? Which *production* database would you like to use? MySQL
? Which *development* database would you like to use? MySQL
? Which cache do you want to use? (Spring cache abstraction) No cache - Warning, when using an SQL database, this will
disable the Hibernate 2nd level cache!
? Would you like to use Maven or Gradle for building the backend? Maven
? Do you want to use the JHipster Registry to configure, monitor and scale your application? No
? Which other technologies would you like to use?
? Which *Framework* would you like to use for the client? Angular
? Do you want to generate the admin UI? Yes
? Would you like to use a Bootswatch theme (https://bootswatch.com/)? Default JHipster
? Would you like to enable internationalization support? No
? Please choose the native language of the application English
? Besides JUnit and Jest, which testing frameworks would you like to use?
? Would you like to install other generators from the JHipster Marketplace? No

导入的JDL文件内容 #

application {
  config {
    baseName jdlimporttest,
    applicationType monolith,
    packageName com.mycompany.myapp,
    authenticationType jwt,
    prodDatabaseType mysql,
    clientFramework angular
  }
  entities *
}

entity Product {
productId String
productName String
description String
price Long
specifications String
}

entity Inventory {
id String
    inStock Integer
    purchased Integer
}

冲突涉及文件 #

• package.json
• src\main\resources\config\liquibase\master.xml
• pom.xml
• src\main\resources\logback-spring.xml
• src\main\resources\config\application.yml
• src\main\resources\config\application-dev.yml
• src\main\resources\config\application-prod.yml
• src\main\java\com\mycompany\myapp\config\WebConfigurer.java
• src\main\java\com\mycompany\myapp\config\SecurityConfiguration.java
• DatabaseConfiguration.java
• ExceptionTranslator.java
• logback.xml

问题原因 #

1. JDL的application配置块中，未明确指定开发数据库类型和缓存提供者，JHipster会使用默认值填充：开发数据库默认H2，缓存默认启用ehcache，直接覆盖了初始项目的配置。
2. 当JDL中包含application块时，导入操作会重新生成整套应用配置文件，和现有项目的自定义配置产生冲突。

解决方法 #

方法1：完善JDL配置，保持与初始项目一致 #

修改JDL文件的config块，补充缺失的配置项，确保和初始创建时的设置匹配：

application {
  config {
    baseName jdlimporttest,
    applicationType monolith,
    packageName com.mycompany.myapp,
    authenticationType jwt,
    prodDatabaseType mysql,
    devDatabaseType mysql, // 新增：指定开发数据库为MySQL
    cacheProvider no, // 新增：指定不使用缓存
    clientFramework angular
  }
  entities *
}

修改后重新执行导入命令，就能保证配置和初始项目一致，不会产生不必要的冲突。

方法2：仅导入实体，忽略应用配置修改 #

如果你的JDL只需要新增实体，不需要修改应用配置，可以在导入时添加--ignore-application参数，跳过application块的处理：

jhipster import-jdl your-jdl-file.jdl --ignore-application

这样只会生成实体相关的代码，不会修改数据库、缓存等核心配置文件。

方法3：修复已产生的冲突 #

如果已经出现文件冲突，先通过版本控制工具（如Git）回滚冲突的配置文件，恢复到初始状态，再选择上述两种方法之一重新导入JDL。

内容的提问来源于stack exchange，提问作者Sanal M