其他包中的@RestController 不起作用

2022-01-13 00:00:00 package spring java maven spring-restcontroller

我从学习 Spring 开始，我创建了创建数据库、插入值并接下来在 Web 浏览器中打印它的基本项目.我的问题是，当我将 RestController 与主类一样放在同一个包中时 - 它可以，但我想将它分发到其他包，并且当我创建新包时，移动 RestController 它不起作用.让我们来解释一下:

I start with learning Spring and I create basic project which creates database, insert values and next print it in web browser. My problem is that when I have RestController in the same package like main class - its OK, but I want distribute it to other package and when I create new package, move the RestController it doesn't work. Let met explain:

我的项目如下:

          |-Springtestv_01
            |-src/main/java
              |--com.person <-- it's a main package
                 |-Main.java
                 |-Person.java
                 |-PersonLineRunner.java
                 |-PersonRepository.java
                 |-PersonController.java
              |-com.controller <-- second package, I want put here PersonController.java
            |-src/main/resources
              |-data.sql
            pom.xml

我的控制器看起来:

@RestController
public class PersonController {

    @Autowired PersonRepository personRepository;

    @RequestMapping("/persons")
    Collection<Person> persons(){
        return this.personRepository.findAll();
    }
}

当一切都在 com.person 包中时，我在网络浏览器 http://localhost:8080/persons 并且它工作正常......但我想将 PersonController.java 移动到 com.controller 包，当我移动它时，我的浏览器会打电话给我

When everything is in com.person package, I write in web brower http://localhost:8080/persons and it works correctly... But I Want move PersonController.java to com.controller package, and when I moved it, my webbrowers calls me

出现意外错误(类型=未找到，状态=404).没有消息可用

There was an unexpected error (type=Not Found, status=404). No message available

我不知道我应该做什么来修复它.也许我应该在我的 pom.xml 中更改一些内容??

and I have no idea what I should do to repair it. Maybe I should change something in my pom.xml ??

我的 pom.xml 看起来像

My pom.xml looks like

<?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.person</groupId>
    <artifactId>person</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>SpringTest_v0_1</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.3.0.BUILD-SNAPSHOT</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

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

    <dependencies>
        <dependency>
            <groupId>com.h2database</groupId><artifactId>h2</artifactId>
        </dependency>

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

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

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

    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>https://repo.spring.io/snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>

</project>

它是自动生成的，我只写了一个依赖

It is generated automatically, I write only one dependency

    <dependency>
        <groupId>com.h2database</groupId><artifactId>h2</artifactId>
    </dependency>

推荐答案

使用basePackages:

Use basePackages:

@ComponentScan(basePackages = { "com.person","com.controller"} )

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