IDEA社区版创建新模块时，无Spring Initializr选项
package com.example.demo;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
//请求处理类
@RestController
public class Hello {
//浏览器请求/hello地址，会调用hello()方法
@RequestMapping("/hello")
public String hello() {
System.out.println("Hello");
return "Hello";
}
}