我正在尝试构建这个RESTful服务示例:
https://spring.io/guides/gs/rest-service/
GreetingController.java的导入没有错误:
package hello;
import java.util.concurrent.atomic.AtomicLong;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class GreetingController {
private static final String template = "Hello, %s!";
private final AtomicLong counter = new AtomicLong();
@RequestMapping(value = "/greeting", method = RequestMethod.GET)
public Greeting greeting(@RequestParam(value = "name", required = false, defaultValue = "World") String name) {
return new Greeting(counter.incrementAndGet(), String.format(template, name));
}
}
但是使用Application.java我得到:
我收到以下错误:无法解析导入org.springframework.boot.我已经将Spring 4库添加到了包含所有jar的项目中.为什么第一次导入工作而第二次没有?我也没有使用@ComponentScan注释出错,但是我收到了@EnableAutoConfiguration注释的错误.
最佳答案 我终于完成了它的工作.问题出在Spring网站上发布的pom.xml文件中:它需要一些修改.这是我使用的版本:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.springframework</groupId>
<artifactId>gs-rest-service</artifactId>
<version>0.1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.1.6.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<properties>
<start-class>hello.Application</start-class>
</properties>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<repositories>
<repository>
<id>spring-releases</id>
<url>http://repo.spring.io/libs-release</url>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>spring-releases</id>
<url>http://repo.spring.io/libs-release</url>
</pluginRepository>
</pluginRepositories>
</project>
然后我继续用Maven,Eclipse插件构建项目.有一个进程占据了8080端口所以我杀了它.我运行了从Maven构建的.jar,它运行了!谢谢你们指出这个问题.我需要Maven来定义依赖项而不是手动包含库.我想我迟早要学习Maven. 🙂