Java spring boot restcontroller不工作

Question

我写了简单的java Spring boot应用程序代码在应用程序中，我有3个类文件

>

学生类-POCO类包含以下代码

package student;

导入java。时间本地日期；

公开课学生{

private Long id;
private String name;
private String email;
private LocalDate dob;
private int age;
public Long getId() {
    return id;
}
public void setId(Long id) {
    this.id = id;
}
public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}
public String getEmail() {
    return email;
}
public void setEmail(String email) {
    this.email = email;
}
public LocalDate getDob() {
    return dob;
}
public void setDob(LocalDate dob) {
    this.dob = dob;
}
public int getAge() {
    return age;
}
public void setAge(int age) {
    this.age = age;
}
public Student(Long id, String name, String email, LocalDate dob, int age) {
    super();
    this.id = id;
    this.name = name;
    this.email = email;
    this.dob = dob;
    this.age = age;
}
@Override
public String toString() {
    return "Student [id=" + id + ", name=" + name + ", email=" + email + ", dob=" + dob + ", age=" + age + "]";
}

}

StudentController类--控制器包含以下代码

包学生；

导入java.time.LocalDate；导入java.util.列表；

导入org.springframework.web.bind.annotation.GetMap；导入org.springframework.web.bind.annotation.Request estMap；导入org.springframework.web.bind.annotation.RestController；

@RestController@Request estMap（path="/api/学生"）公开课学生控制器{

 @GetMapping(path="/all")
 public List<Student> getStudents()
 {
     return List.of(
             new Student(
                     1L,
                     "Yuvraj Meshram",
                     "[e-mail]",
                     LocalDate.of(2001, 5, 6),
                     21
                     )
             );
 }

}

如果我运行应用程序，它开始没有任何错误localhost:8080，但当我点击网址"localhost:8080/api/student/all"，它显示我的错误页面"WhiteLabel错误页面".

我的pom。xml包含以下代码

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.7.1</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>17</java.version>
    </properties>
    <dependencies>
        <!-- 
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>org.postgresql</groupId>
            <artifactId>postgresql</artifactId>
            <scope>runtime</scope>
        </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>

请帮我对付这些家伙。

Answer 1

尝试在DemoApplication类的顶部添加@ComponentScan。这可能是一个一揽子问题。