我按照这个 Spring教程 实现了一切,一切都很顺利。然后,我决定添加删除和修改功能。我已经实现了它们,但是当我尝试使用它们时,我得到了以下错误:
以下是MainController.java的代码:
{"status":405,"error":"Method Not Allowed","message":"Request method 'POST' not supported","path":"/demo/delete"}
{"status":405,"error":"Method Not Allowed","message":"Request method 'POST' not supported","path":"/demo/modify"}
我执行的命令:
curl localhost:8080/demo/delete -d name=First
curl localhost:8080/demo/modify -d name=First -d email=abc@gmail.com
//if the name doesn't exist in both methods, it will return "Nonexistent user!"
以下是MainController.java的代码:
package com.example.accessingdatamysql;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
@Controller
@RequestMapping(path="/demo")
public class MainController {
@Autowired
private UserRepository userRepository;
@PostMapping(path="/add")
public @ResponseBody String addNewUser (@RequestParam String name,
@RequestParam String email) {
User n = new User();
n.setName(name);
n.setEmail(email);
userRepository.save(n);
return "Saved\n";
}
@GetMapping(path="/all")
public @ResponseBody Iterable<User> getAllUsers() {
return userRepository.findAll();
}
/* ----------------- NEW METHODS THAT I'VE CREATED ----------------- */
@DeleteMapping(path="/delete")
public String delete(@RequestParam String name) throws Exception {
if(userRepository.findByName(name).equals(null)) {
System.out.println("Nonexistent user!\n");
}
userRepository.deleteByName(name);
return "User successfully deleted!\n";
}
@PutMapping(path="/modify")
public String modify(@RequestParam String name, @RequestParam String email) throws Exception {
if(userRepository.findByName(name).equals(null)) {
System.out.println("Nonexistent user!\n");
}
userRepository.deleteByName(name);
User n = new User();
n.setName(name);
n.setEmail(email);
userRepository.save(n);
return "User successfully modified!\n";
}
}
User.java
package com.example.accessingdatamysql;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class User {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
private String name;
private String email;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
UserRepository.java
package com.example.accessingdatamysql;
import org.springframework.data.repository.CrudRepository;
import com.example.accessingdatamysql.User;
public interface UserRepository extends CrudRepository<User, Integer> {
public User findByName(String name);
public void deleteByName(String name);
}
我不知道这里发生了什么。我已经搜索了其他类似的问题,但没有一个可以解决我的问题。
curl
)。 - IncredibleCoding