Java 使用JHipster单独或单独结束应用程序：

为前端和后端应用程序创建两个目录

• mkdir前端
• mkdir后端

将目录更改为frontend，并运行JHipster命令仅创建frontend模块

• cd前端
• jhipster--跳过服务器--db=sql--auth=jwt
• 如果一切正常，请运行npm start命令来运行前端应用程序

我将mysql用于db，JWT用于auth，如果您想使用websocket，请添加：“--websocket=SpringWebSocket”

现在，将您的目录更改为后端，并运行JHipster命令来创建后端模块

• cd//因为我们目前正在备份后端目录
• cd后端
• jhipster—跳过客户端
• 在运行spring引导应用程序时运行后端应用程序

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现在，您的前端和后端应用程序分别运行，前端通过REST API调用与后端应用程序协调。

这只是一个想法，但您可以再次检查后端是否能够处理有效凭据。看到了吗？丹尼尔：不幸的是，没有。在我问了这个问题后，我很快就停止了与杰普斯特的游戏。@musa我下面的回答帮助了其他一些人，也是我解决问题的方法。请查看并考虑将其标记为已接受的答案。现在您想在PROD上部署它，您将创建一个WAR /jar部署。您需要在项目中更改哪些文件？对于部署，更好的方法是分别部署前端和后端。tomcat上的后端和apache上的前端。谢谢。但我想在谷歌应用程序引擎上部署。那么我应该为它制作两个不同的项目吗？如何将前端应用程序与后端应用程序连接起来（是的，我可以使用rest调用，但是…），我得到服务器API URL:

”

Welcome to the JHipster Generator

? (1/13) What is the base name of your application? jhipster
? (2/13) What is your default Java package name? com.mycompany.myapp
? (3/13) Do you want to use Java 8? Yes (use Java 8)
? (4/13) Which *type* of authentication would you like to use? Token-based authentication (stateless, with a token)
? (5/13) Which *type* of database would you like to use? SQL (H2, MySQL, PostgreSQL)
? (6/13) Which *production* database would you like to use? MySQL
? (7/13) Which *development* database would you like to use? H2 in-memory with Web console
? (8/13) Do you want to use Hibernate 2nd level cache? Yes, with ehcache (local cache, for a single node)
? (9/13) Do you want to use clustered HTTP sessions? No
? (10/13) Do you want to use WebSockets? No
? (11/13) Would you like to use Maven or Gradle for building the backend? Maven (recommended)
? (12/13) Would you like to use Grunt or Gulp.js for building the frontend? Grunt (recommended)
? (13/13) Would you like to use the Compass CSS Authoring Framework? No

...

I'm all done. Running bower install & npm install for you
^C

[DEBUG] com.mycompany.myapp.security.Http401UnauthorizedEntryPoint - Pre-authenticated entry point called. Rejecting access

XMLHttpRequest cannot load http://localhost:8080/api/authenticate. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:9000' is therefore not allowed access.

.antMatchers(org.springframework.http.HttpMethod.OPTIONS, "/api/**").permitAll()

response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
response.setHeader("Access-Control-Max-Age", "86400"); // 24 Hours
response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, x-auth-token");

   <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-catalina</artifactId>
        <version>8.0.15</version>
        <scope>provided</scope>
    </dependency>

private void initCorsFilter(ServletContext servletContext, EnumSet<DispatcherType> disps) {
        log.debug("Registering CORS Filter");
        FilterRegistration.Dynamic corsFilter = servletContext.addFilter("corsFilter", new CorsFilter());
        Map<String, String> parameters = new HashMap<>();
        parameters.put("cors.allowed.headers", "Content-Type,X-Requested-With,accept,Origin,Access-Control-Request-Method,Access-Control-Request-Headers,Authorization");
        parameters.put("cors.allowed.methods", "GET,POST,HEAD,OPTIONS,PUT,DELETE");
        corsFilter.setInitParameters(parameters);
        corsFilter.addMappingForUrlPatterns(disps, false, "/*");
        corsFilter.setAsyncSupported(true);
    }

...
initCorsFilter(servletContext, disps);
...

var links = {};
if (!angular.isObject()) {
    // CORS OPTIONS responses
    return links;
}

if (header.length == 0) {
    throw new Error("input must not be of zero length");
}

// Split parts by comma
var parts = header.split(','); 

...