java.lang.IllegalArgumentException:未找到类型为class java.util.ArrayList的返回值的转换器

我使用这段代码将学生列表作为JSON返回

@RequestMapping(value = "/students.html", method = RequestMethod.GET)
    public @ResponseBody
    List<Student> getStudentList(){

        Student student1 = new Student();
        student1.setStudentName("Leo");

        Student student2 = new Student();
        student2.setStudentName("Giggix");

        Student student3 = new Student();
        student3.setStudentName("John Cena");

        List<Student> students = new ArrayList<>();
        students.add(student1);
        students.add(student2);
        students.add(student3);

        return students;

    }

在我的pom.xml中，我有以下依赖项：

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.9</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.9</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.9</version>
        </dependency>

com.fasterxml.jackson.core
杰克逊核心
2.9.9
com.fasterxml.jackson.core
杰克逊数据绑定
2.9.9
com.fasterxml.jackson.core
杰克逊注释
2.9.9

我已经尝试过类似问题中发布的所有解决方案，你有什么想法吗？

List List=new ArrayList（）

---

同时设置arraylist的数据类型。

学生类是否有公共getter方法？以下是类：公共类学生{private studentName；公共void setStudentName（String studentName）{this.studentName=studentName；}公共字符串getStudentName（）{return studentName；}这对解决转换器问题有何帮助？

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.9</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.9</version>
        </dependency>

        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.9.9</version>
        </dependency>