在 SPRING 引導中未找到映射

Question

I created a simple spring boot app when i try to hit the endpoint http://localhost:9094/kan/echo am getting the below exception please help me resolve it osweb.servlet.PageNotFound: No mapping for GET i have attached the controller class 和 pom.xml 文件誰能幫幫我

@CrossOrigin(origins = "http://localhost:4200")
@RestController
@RequestMapping("/kan")
public class TestController {

     @GetMapping(value = "/echo", produces = {"application/json"})
    public List<Employee> fetch(){
        List<Employee> tempEmployees = new ArrayList<>();
        Employee emp1= new Employee();
        emp1.setName("emp1");
        emp1.setDesignation("manager");
        emp1.setEmpId("1");
        emp1.setSalary(3000);
        tempEmployees.add(emp1);
        return tempEmployees;
    }

    }

pom.xml

<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.package</groupId>
    <artifactId>javainuse</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>SpringBootHelloWorld</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            </dependency>
            <dependency>
        <groupId>org.apache.tomcat.embed</groupId>
        <artifactId>tomcat-embed-jasper</artifactId>
        <scope>provided</scope>
    </dependency>
    </dependencies>

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

屬性文件

server.port=9094

項目結構https://i.stack.imgur.com/JXCzm.png

Answer 1

根據您的項目結構，我認為您正面臨錯誤，因為您的主要 class 錯位。 你的項目結構應該像

src/main/java
    |-com.kanda
          |-javainuse(package)
               |-TestController.java
          |-model(package)
               |-Employee.java
          SpringBootHelloWorldApplication.java

In you project first create a package com.kanda where you put javainuse , model and your main class SpringBootHelloWorldApplication.java . 並在內部 package 中放入您的 controller 和 model ZA2F2ED4F8EBC2CBB16C21A29DC40。 在springboot中，需要將主class放在主package中。

更新項目結構https://i.stack.imgur.com/ORAgl.png