Spring工具套件中未解決的Spring依賴關系

Question

我在春季開始了一個教程。

我下載了Spring Tool Suite，然后創建了作為模板提供的demo項目，然后創建了一個類並編寫了以下代碼：

package com.example;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class WhateverIWant {

    @RequestMapping("/hi")
    public @ResponseBody String hiThere() {
        return "hello world!";
    }
}

問題在於無法識別ResponseBody和RequestMapping 。

我右鍵單擊該項目並執行Run As ，然后執行mvn clean和mvn install ，但是仍然無法識別依賴項。

我的pom.xml ：

<?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>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


</project>

如何使Spring Tool Suite知道依賴關系？

Answer 1

問題在於無法識別ResponseBody和RequestMapping。

您缺少pom的以下依賴項。

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>

Answer 2

添加彈簧網罐

 <dependency>
      <groupId>org.springframework</groupId>
       <artifactId>spring-webmvc</artifactId>
       <version>3.2.3.RELEASE</version>
 </dependency>