我有一个使用 Spring 构建的小型 Web 应用程序，并且可以从curl 和 postman 访问 REST 服务。如果我尝试使用 Web 应用程序上托管的 JavaScript 访问它们，则会收到 405 错误。什么可能导致这种情况？我意识到代码中存在不安全性，这只是一个仓促的课程项目，所以它们并不重要。如果我复制 JavaScript 代码并在浏览器的控制台中运行它，它就会起作用。用户等级import org.springframework.data.annotation.Id;public class User {    @Id    public String id;    private String username;    private String firstName;    private String lastName;    private String password;    private int zipCode;    private int jacketThreshold;    private int coatThreshold;    public User() {}    public User(String username)    {        this.username = username;    }    public User(String firstName, String lastName, String password) {        this.firstName = firstName;        this.lastName = lastName;        this.password = password;    }    public User(String username, String password, int zipCode) {        this.username = username;        this.password = password;        this.zipCode = zipCode;    }    public String getId() {        return id;    }    public void setId(String id) {        this.id = id;    }    public String getUsername() {        return username;    }    public void setUsername(String username) {        this.username = username;    }    public String getFirstName() {        return firstName;    }    public void setFirstName(String firstName) {        this.firstName = firstName;    }    public String getLastName() {        return lastName;    }    public void setLastName(String lastName) {        this.lastName = lastName;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public int getZipCode() {        return zipCode;    }    public void setZipCode(int zipCode) {        this.zipCode = zipCode;    }    public int getJacketThreshold() {        return jacketThreshold;    }    public void setJacketThreshold(int jacketThreshold) {        this.jacketThreshold = jacketThreshold;    }