SpringBoot项目登陆页面

前面都是自动生成的

 

 自动联网生成后会自动下载相关依赖

题外话一句：刚用idea不久，发现新项目每次都要设置下maven，贼烦，怎么破？

 新建一个control

@RestController
public class helloControl {
    @GetMapping("/hello")
    public String hello(){
        return "hello SpringBoot";
    }
}

运行main方法

 http://localhost:8080/hello

到此还没有结束~~~

在特么templates下新建login.html页面

Controller内接口注解调整，防止只会返回字符串

@Controller
public class helloControl {
    @GetMapping("/hello")
    @ResponseBody
    public String hello(){
        return "hello SpringBoot";
    }

    @GetMapping("/login")
    public String login(){
        return "login";
    }
}

启动，o78k，报错了

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-resources-plugin:3.2.0:resources (default-resources) on project springbootdeme: Input length = 1 -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

定位，联网自动生成的pom文件里maven版本过高，降级

<plugins>
            <!--<plugin>这个版本太高了
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.7</version>
                <dependencies>
                    <dependency>
                        <groupId>org.apache.maven.shared</groupId>
                        <artifactId>maven-filtering</artifactId>
                        <version>1.3</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>

修改过可以正常启动了。开始访问http://localhost:8080/login

o78k，报错了， 罚克~~~过完年再看

javax.servlet.ServletException: Circular view path [login]: would dispatch back to the current handler URL [/login] again. 
Check your ViewResolver setup! (Hint: This may be the result of an unspecified view, due to default view name generation.)
    at org.springframework.web.servlet.view.InternalResourceView.prepareForRendering(InternalResourceView.java:210) ~[spring-webmvc-5.3.3.jar:5.3.3]
    at org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:148) ~[spring-webmvc-5.3.3.jar:5.3.3]
    at org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:316) ~[spring-webmvc-5.3.3.jar:5.3.3]、

 ok，家人看春晚，我在搞代码，代码都删除，重新搞一个

启动，竟然好了，真是神奇~~~~

可是，这是为什么呢？？