Spring 错误请求 400

Question

我一直在尝试开发我的简单 Spring 应用程序，但是当我收到请求时，我总是收到 400 代码，但我不知道为什么。我在下面提供了 Main、Controller 和服务类。我仔细检查了为请求提供的路径，但仍然没有任何结果。

POST http://localhost:8080/api/v2/customer
Content-Type: application/json
{
"name": "Alex",
"phoneNumber": "0756526",
"createdAt": "2022-12-17"
}

数据库实体管理器类

package com.example.greenbottle.customer;

import javax.persistence.*;
import java.time.LocalDate;

@Entity
@Table
public class Customer {
    @Id
    @SequenceGenerator(
            name = "customer_sequence",
            sequenceName = "customer_sequence",
            allocationSize = 1
    )
    @GeneratedValue(
            strategy = GenerationType.SEQUENCE,
            generator = "customer_sequence"
    )
    private Long id;
    private String name;
    private String phoneNumber;
    private LocalDate createdAt;

    public Customer(String name, String phoneNumber,LocalDate createdAt) {
        this.name = name;
        this.phoneNumber = phoneNumber;
        this.createdAt = createdAt;
    }

    public Customer() {}

    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 getPhoneNumber() {
        return phoneNumber;
    }

    public void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

    public LocalDate getCreatedAt() {
        return createdAt;
    }

    public void setCreatedAt(LocalDate createdAt) {
        this.createdAt = createdAt;
    }
}

客户

@RestController

package com.example.greenbottle.customer;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping(path = "api/v2/customer")
public class CustomerController {
    private final CustomerService customerService;

    @Autowired
    public CustomerController(CustomerService customerService) {this.customerService = 
    customerService;}

    @GetMapping
    public List<Customer> getCustomers() {return customerService.getCustomers();}

    @PostMapping
    public void registerNewCustomer(@RequestBody Customer customer) 
    {customerService.registerNewCustomer(customer);}

}

还有客户

@Service

类

package com.example.greenbottle.customer;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;

import java.util.List;
import java.util.Optional;

@Service
public class CustomerService {
    private final CustomerRepository customerRepository;

    @Autowired
    public CustomerService(CustomerRepository customerRepository) {this.customerRepository = customerRepository;}

    public List<Customer> getCustomers() {
        return customerRepository.findAll();
    }

    public void registerNewCustomer(Customer customer) {
        customerRepository.save(customer);
    }

}

Answer 1

HTTP 消息语法必须遵循协议定义，即在标头末尾和有效负载数据（正文）开始之前必须有一个空行。不这样做，将导致 HTTP 请求格式错误。

所以，你可以尝试：

POST http://localhost:8080/api/v2/customer
Content-Type: application/json
//MANDATORY EMPTY-LINE HERE
{
"name": "Alex",
...
...
}