11.3 編寫實例代碼

To finish our application, we need to create a single Java file. By default, Maven compiles sources from src/main/java, so you need to create that folder structure and then add a file named src/main/java/Example.java to contain the following code: 為了完成應用程序， 需要創(chuàng)建一個Java文件。 默認情況下， Maven從src/main/java（目錄）下編譯源碼， 因此需要創(chuàng)建那文件夾結構，然后添加一個名叫src/main/java/Example.java的文件， 文件內(nèi)容包含如下代碼：

import org.springframework.boot.*;
import org.springframework.boot.autoconfigure.*;
import org.springframework.web.bind.annotation.*;
@RestController
@EnableAutoConfiguration
public class Example {
    @RequestMapping("/")
    String home() {
        return "Hello World!";
    }
    public static void main(String[] args) throws Exception {
        SpringApplication.run(Example.class, args);
    }
}

Although there is not much code here, quite a lot is going on. We step through the important parts in the next few sections. 盡管這兒沒有太多代碼， 但是很多代碼在進行中。 在接下來的幾節(jié)中，我們將逐步了解重要的部分。