我又挣扎了一个小时来修东西，但我还是不能让它工作：
我有一个简单的程序，它从index.html中的注册表中获取信息，并将其添加到PostgreSQL数据库中。
当我点击注册，该程序的工作，并添加到数据库中的信息
问题是我无法让重定向起作用
我得到以下错误

This site can’t be reachedThe webpage at http://localhost:8081/register might be temporarily down or it may have moved permanently to a new web address.
ERR_UNSAFE_REDIRECT

我的java代码如下：

• 这是注册控制器类

package ro.fortech.guardianangel.registration;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.servlet.view.RedirectView;

@RestController
@RequestMapping("/register")
public class RegistrationController {

    @Autowired
    private UserRepository userRepository;

    @PostMapping(consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public RedirectView registerSubmit(Users users) {
        Users user = userRepository.save(users);
        return new RedirectView("file:///C:/Users/timis/Desktop/programare/curs%20java/Proiect/frontend/index.html#!");
    }
}

• 这是“用户”类

package ro.fortech.guardianangel.registration;

import lombok.Data;
import javax.persistence.*;

@Entity
@Table(name = "users")
@Data
public class Users {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;

    @Column(name = "first_name")
    private String firstName;

    @Column(name = "last_name")
    private String lastName;

    private String email;
    private String password;
}

• 这是UserRepository接口

package ro.fortech.guardianangel.registration;

import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends CrudRepository<Users, Integer> {}

所以基本上在我点击提交后，我希望我的浏览器带我回到：

file:///C:/Users/timis/Desktop/programare/curs%20java/Proiect/frontend/index.html