1.使用STS创建SpringBoot项目
创建的SpringBoot项目默认是没有web.xml文件的，需要手动添加。
SpringBoot项目的结构如下：
2.遇到Whitelabel Error Page的问题
package com.example.model;
public class Greeting {
private long id;
private String content;
public Greeting() {
}
public Greeting(long id, String content) {
this.id = id;
this.content = content;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
}
package com.example.controller;
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import com.example.model.Greeting;
//@RestController = @Controller + @ResponseBody
@RestController
public class GreetingController {
private static final String template = "Hello, %s!";
private final AtomicLong counter = new AtomicLong();
/* The Greeting object must be converted to JSON. Thanks to Spring’s HTTP message converter support,
you need not do this conversion manually. Because Jackson 2 is on the classpath,
Spring’s MappingJackson2HttpMessageConverter is automatically chosen to convert the Greeting instance to JSON.
*/
@GetMapping("/greeting")
public Greeting greeting(@RequestParam(value = "name", defaultValue = "World") String name) {
return new Greeting(counter.incrementAndGet(), String.format(template, name));
}
}
参考：