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Spring Boot右键maven build成功但是直接运行main方法出错的解决方案

人气:2

1、代码就一个Controller,从官网复制过来的,如下

package com.springboot.controller;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
@Controller
@EnableAutoConfiguration
public class SampleController {
  
  @RequestMapping("/index")
  @ResponseBody
  String home() {
    return "Hello World";
  }
  public static void main(String[] args) throws Exception {
    SpringApplication.run(SampleController.class, args);
  }
}

2、在项目上右键,maven build,输入 spring-boot:run,过几秒后控制台能看见success,也能看见Hello World,但是没有传说中的那个用字符拼拼出来的spring图案,而且http://localhost:8080/也打不开,于是我机智的在上面的SampleController类中右键->java Application,果真,出错了,还more than 18... 错误如下:

1 Cannot instantiate interface org.springframework.boot.SpringApplicationRunListener : org.springframework.boot.context.event.EventPublishingRunListener

等等之类的,就是找不到类的error

3、我的解决办法

之前我的pom.xml:

 <parent>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-parent</artifactId>
   <version>1.5.8.RELEASE</version>
 </parent>

百度、搜狗、谷歌找了2个小时的方法,自己手动引入其他dependency等等都不行,但是更改了springboot的版本就好了,更改后如下:

 <parent>
   <groupId>org.springframework.boot</groupId>
   <artifactId>spring-boot-starter-parent</artifactId>
   <version>1.4.7.RELEASE</version>
 </parent>

4、最后在SampleController类中右键->java Application,终于再console中输出了:

.  ____     _      __ _ _
 /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/ ___)| |_)| | | | | || (_| | ) ) ) )
 ' |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::    (v1.4.7.RELEASE)

2017-11-03 16:17:14.954 INFO 6416 --- [      main] c.s.controller.SampleController     : Starting SampleController on USER-20170626MT with PID 6416 (D:\j2ee_workspace\SpringTest\target\classes started by Administrator in D:\j2ee_workspace\SpringTest)
2017-11-03 16:17:14.956 INFO 6416 --- [      main] c.s.controller.SampleController     : No active profile set, falling back to default profiles: default
2017-11-03 16:17:15.005 INFO 6416 --- [      main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@411f53a0: startup date [Fri Nov 03 16:17:15 CST 2017]; root of context hierarchy
2017-11-03 16:17:16.688 INFO 6416 --- [      main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http)
2017-11-03 16:17:16.702 INFO 6416 --- [      main] o.apache.catalina.core.StandardService  : Starting service [Tomcat]

打开http://localhost:8080/也能看见我的Hello World

仔细观察了最后一句,应该还有一些问题。

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