通過 Postman 運行 Spring 啟動應用程序時出錯

Question

運行代碼時出現白標簽頁面錯誤，如 Postman 所示請幫助解決問題：注意：所有類都低於主要的 class 根據幾個檢查的解決方案。 @ComonentScan 的問題也一樣。

Postman 錯誤：{“時間戳”：“2022-08-05T12:08:42.938+00:00”，“狀態”：404，“錯誤”：“未找到”，“路徑”：“/dept/”}

Json 給定：{“部門名稱”：“XYZ”，“地址”：“XYZ”}

代碼：

Entity:
package com.microservice.Entity;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
//import javax.persistence.Table;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;


@Entity
@Data

@AllArgsConstructor
@NoArgsConstructor
public class Department {
    
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private int departmentId;
    

    private String deptName;


    private String address;

}

服務：

package com.microservice.Service;

import com.microservice.Entity.Department;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.microservice.Repository.DepartmentRepository;

@Service

    public class DepartmentService {
        @Autowired
        private DepartmentRepository departmentRepository;
    
    
    
        public Department getByID(int departmentId)
        {
            return departmentRepository.findByDepartmentId(departmentId);
        }
    
        public Department saveDepartment(Department department) {
            return departmentRepository.save(department);
        }
    }

Controller：

package com.microservice.FController;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import com.microservice.Entity.Department;
import com.microservice.Service.DepartmentService;

@RestController
@RequestMapping("/dept")
public class DepartmentController {

  @Autowired
    private DepartmentService departmentservice;




 @PostMapping("/")
    public Department saveDepartment(@RequestBody Department department){
        return departmentservice.saveDepartment(department);
    }

@GetMapping("/{id}")
    public Department getByID(@PathVariable("id") Integer departmentId  ) {
    System.out.println("Inside get id controller method");

    return departmentservice.getByID(departmentId);
}



}

存儲庫：

package com.microservice.Repository;
import org.springframework.data.jpa.repository.JpaRepository;

import com.microservice.Entity.Department;

public interface DepartmentRepository extends JpaRepository<Department,Integer> {

     Department findByDepartmentId(int departmentId);
}

Main Class:
package com.microservice.Departmentservice;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication
public class DepartmentServiceApplication {

    public static void main(String[] args) {
        SpringApplication.run(DepartmentServiceApplication.class, args);
    }

}

Answer 1

我試過你的代碼和接縫是正確的。 只需兩次檢查，您必須在Postman中請求的URL中完成此操作：

• 首先：確保您向 URL 發出POST請求，而不是GET
• 第二：在saveDepartment方法之上的@PostMapping("/")中添加一個斜杠字符/ 。 因此，您必須將您的發布請求設置為：

 http://localhost:9009/dept/

請注意請求末尾的斜杠。

否則，如果你錯過了這個字符，你會得到 404 not found 錯誤/

---

另一種方法是簡單地從saveDepartment方法頂部的@PostMapping("")中刪除/ ：

@PostMapping("")
public Department saveDepartment(@RequestBody Department department){
    return departmentservice.saveDepartment(department);
}