java - Spring Boot 无法检测我输入的值-6ren

java - Spring Boot 无法检测我输入的值

转载作者：行者123 更新时间：2023-11-30 01:59:52

我在使用 mongodb atlas 作为数据库通过 REST API 将数据从 Angular 插入到 Spring Boot 时遇到问题。我创建了另一个名为“numbers”的变量来测试它。但事实证明，这些值能够在 Angular 上捕获，但在 Spring Boot 中却无法捕获。以下是我的代码:

Angular 代码:

<div class="todo-content">
<h1 class="page-title">My Todos</h1>
<div class="todo-create">
  <form #todoForm="ngForm" (ngSubmit) = "createTodo(todoForm)" novalidate>
    <input type="text" id="title" class="form-control" placeholder="Type a todo and press enter..." 
           required
           name="title" [(ngModel)]="newTodo.title"
           #title="ngModel" >     

    <input type="text" id="numbers" class="form-control" placeholder="Type a todo and press enter..." 
           required
           name="numbers" [(ngModel)]="newTodo.numbers"
           #numbers="ngModel" >     

    <div *ngIf="title.errors && title.dirty"
         class="alert alert-danger">
        <div [hidden]="!title.errors.required">
          Title is required.
        </div>
    </div>

    <td><button class="btn btn-danger" (ngSubmit) = "createTodo(todoForm)"> submit User</button></td>
  </form>
</div>
<ul class="todo-list">
  <li *ngFor="let todo of todos" [class.completed]= "todo.completed === true" >
    <div class="todo-row" *ngIf="!editing || editingTodo.id != todo.id">
        <a class="todo-completed" (click)="toggleCompleted(todo)">
          <i class="material-icons toggle-completed-checkbox"></i> 
        </a> 
        <span class="todo-title">
          {{todo.title}}
        </span>
        <span class="todo-actions">
            <a (click)="editTodo(todo)">
              <i class="material-icons edit">edit</i>
            </a>
            <a (click)="deleteTodo(todo.id)">
              <i class="material-icons delete">clear</i>
            </a>
        </span>
    </div>
    <div class="todo-edit" *ngIf="editing && editingTodo.id === todo.id">
        <input class="form-control" type="text" 
         [(ngModel)]="editingTodo.title" required>
        <span class="edit-actions">
            <a (click)="updateTodo(editingTodo)">
              <i class="material-icons">done</i>
            </a>
            <a (click)="clearEditing()">
              <i class="material-icons">clear</i>
            </a>
        </span>
    </div>
  </li>
</ul>
<div class="no-todos" *ngIf="todos && todos.length == 0">
    <p>No Todos Found!</p>
</div>

todo-list.component.ts

  import { Component, Input, OnInit } from '@angular/core';
import { TodoService } from './todo.service';
import { Todo } from './todo';
import {NgForm} from '@angular/forms';

@Component({
  selector: 'todo-list',
  templateUrl: './todo-list.component.html'
})

export class TodoListComponent implements OnInit {
  todos: Todo[];
  newTodo: Todo = new Todo();
  editing: boolean = false;
  editingTodo: Todo = new Todo();

  constructor(
    private todoService: TodoService,
  ) {}

  ngOnInit(): void {
    this.getTodos();
  }

  getTodos(): void {
    this.todoService.getTodos()
      .then(todos => this.todos = todos );    
  }

  createTodo(todoForm: NgForm): void {
    console.log(this.newTodo.numbers);
    console.log(todoForm);
    this.todoService.createTodo(this.newTodo)
      .then(createTodo => {    
        todoForm.reset();
        this.newTodo = new Todo();
        this.todos.unshift(createTodo)
      });
  }

  deleteTodo(id: string): void {
    this.todoService.deleteTodo(id)
    .then(() => {
      this.todos = this.todos.filter(todo => todo.id != id);
    });
  }

  updateTodo(todoData: Todo): void {
    console.log(todoData);
    this.todoService.updateTodo(todoData)
    .then(updatedTodo => {
      let existingTodo = this.todos.find(todo => todo.id === updatedTodo.id);
      Object.assign(existingTodo, updatedTodo);
      this.clearEditing();
    });
  }

  toggleCompleted(todoData: Todo): void {
    todoData.completed = !todoData.completed;
    this.todoService.updateTodo(todoData)
    .then(updatedTodo => {
      let existingTodo = this.todos.find(todo => todo.id === updatedTodo.id);
      Object.assign(existingTodo, updatedTodo);
    });
  }

  editTodo(todoData: Todo): void {
    this.editing = true;
    Object.assign(this.editingTodo, todoData);
  }

  clearEditing(): void {
    this.editingTodo = new Todo();
    this.editing = false;
  }
}

todo.service.ts

import { Injectable } from '@angular/core';
import { Todo } from './todo';
import { Headers, Http } from '@angular/http';
import 'rxjs/add/operator/toPromise';

@Injectable()
export class TodoService {
  private baseUrl = 'http://localhost:8080';

  constructor(private http: Http) { }

  getTodos():  Promise<Todo[]> {
    return this.http.get(this.baseUrl + '/api/todos/')
      .toPromise()
      .then(response => response.json() as Todo[])
      .catch(this.handleError);
  }

  createTodo(todoData: Todo): Promise<Todo> {
    console.log("inside service");
    console.log(todoData);
    console.log(todoData.numbers);
    return this.http.post(this.baseUrl + '/api/todos/', todoData, "a")
      .toPromise().then(response => response.json() as Todo)
      .catch(this.handleError);
  }

  updateTodo(todoData: Todo): Promise<Todo> {
    return this.http.put(this.baseUrl + '/api/todos/' + todoData.id, todoData)
      .toPromise()
      .then(response => response.json() as Todo)
      .catch(this.handleError);
  }

  deleteTodo(id: string): Promise<any> {
    return this.http.delete(this.baseUrl + '/api/todos/' + id)
      .toPromise()
      .catch(this.handleError);
  }

  private handleError(error: any): Promise<any> {
    console.error('Some error occured', error);
    return Promise.reject(error.message || error);
  }
}

todo.ts

export class Todo {
  id: string;
  title: string;
  numbers: string;
  completed: boolean;
  createdAt: Date;
}

Spring 启动:

Todo Controller

package com.example.todoapp.controllers;

import javax.validation.Valid;
import com.example.todoapp.models.Todo;
import com.example.todoapp.repositories.TodoRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import java.util.List;

@RestController
@RequestMapping("/api")
@CrossOrigin("*")
public class TodoController {

    @Autowired
    TodoRepository todoRepository;

    @GetMapping("/todos")
    public List<Todo> getAllTodos() {
        Sort sortByCreatedAtDesc = new Sort(Sort.Direction.DESC, "createdAt");
        return todoRepository.findAll(sortByCreatedAtDesc);
    }

    @PostMapping("/todos")
    public Todo createTodo(@Valid @RequestBody Todo todo, String numbers) {
        System.out.println(todo.getNumber());
        System.out.println(todo.getTitle());
        System.out.println(numbers+ "numbers");
        todo.setCompleted(false);
        return todoRepository.save(todo);
    }

    @PostMapping("/contact")
    public Todo createContact(@Valid @RequestBody Todo todo) {
        todo.setCompleted(false);
        return todoRepository.save(todo);
    }

    @GetMapping(value="/todos/{id}")
    public ResponseEntity<Todo> getTodoById(@PathVariable("id") String id) {
        return todoRepository.findById(id)
                .map(todo -> ResponseEntity.ok().body(todo))
                .orElse(ResponseEntity.notFound().build());
    }

    @PutMapping(value="/todos/{id}")
    public ResponseEntity<Todo> updateTodo(@PathVariable("id") String id,
                                           @Valid @RequestBody Todo todo) {
        return todoRepository.findById(id)
                .map(todoData -> {
                    todoData.setTitle(todo.getTitle());
                    todoData.setCompleted(todo.getCompleted());
                    Todo updatedTodo = todoRepository.save(todoData);
                    return ResponseEntity.ok().body(updatedTodo);
                }).orElse(ResponseEntity.notFound().build());
    }

    @DeleteMapping(value="/todos/{id}")
    public ResponseEntity<?> deleteTodo(@PathVariable("id") String id) {
        return todoRepository.findById(id)
                .map(todo -> {
                    todoRepository.deleteById(id);
                    return ResponseEntity.ok().build();
                }).orElse(ResponseEntity.notFound().build());
    }
}

Todo存储库

package com.example.todoapp.repositories;

import com.example.todoapp.models.Todo;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface TodoRepository extends MongoRepository<Todo, String> {

}

待办事项

package com.example.todoapp.models;

import java.util.Date;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Size;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.index.Indexed;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collection="todos")
@JsonIgnoreProperties(value = {"createdAt"}, allowGetters = true)
public class Todo {
    @Id
    private String id;

    @NotBlank
    @Size(max=100)
    @Indexed(unique=true)
    private String title;

    @Size(max=100)
    @Indexed(unique=false)
    private String numbers;

    private Boolean completed = false;

    private Date createdAt = new Date();

    public Todo() {
        super();
    }

    public Todo(String title, String numbers) {
        this.title = title;
        this.numbers= numbers;
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public Boolean getCompleted() {
        return completed;
    }

    public void setCompleted(Boolean completed) {
        this.completed = completed;
    }

    public Date getCreatedAt() {
        return createdAt;
    }

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



    public String getNumber() {
        return numbers;
    }

    public void setNumber(String number) {
        this.numbers = number;
    }

    @Override
    public String toString() {
        return String.format(
                "Todo[id=%s, title='%s',numbers='%s', completed='%s']",
                id, title,numbers, completed);
    }
}

Angular 误差:

fff
todo-list.component.ts:32 NgForm {_submitted: true, ngSubmit: EventEmitter, form: FormGroup}
todo.service.ts:20 inside service
todo.service.ts:21 Todo {a: true, title: "My Web Application went blank on private mode", numbers: "fff"}
todo.service.ts:22 fff

来自 Spring Boot 的错误:

      .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.0.0.RELEASE)

2018-11-10 16:13:21.940  INFO 9436 --- [           main] com.example.todoapp.TodoappApplication   : Starting TodoappApplication on NCS-180417AV05 with PID 9436 (E:\Project\portfolio_website\templates\spring-boot-mongodb-angular-todo-app-master\spring-boot-backendv2\target\classes started by royyzh in E:\Project\portfolio_website\templates\spring-boot-mongodb-angular-todo-app-master\spring-boot-backendv2)
2018-11-10 16:13:21.944  INFO 9436 --- [           main] com.example.todoapp.TodoappApplication   : No active profile set, falling back to default profiles: default
2018-11-10 16:13:21.992  INFO 9436 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@327b636c: startup date [Sat Nov 10 16:13:21 SGT 2018]; root of context hierarchy
2018-11-10 16:13:23.367  INFO 9436 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2018-11-10 16:13:23.393  INFO 9436 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2018-11-10 16:13:23.393  INFO 9436 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.28
2018-11-10 16:13:23.399  INFO 9436 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener   : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:\Program Files\Java\jre1.8.0_181\bin;C:\windows\Sun\Java\bin;C:\windows\system32;C:\windows;C:/Program Files/Java/jre1.8.0_181/bin/server;C:/Program Files/Java/jre1.8.0_181/bin;C:/Program Files/Java/jre1.8.0_181/lib/amd64;C:\ProgramData\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\windows\system32;C:\windows;C:\windows\System32\Wbem;C:\windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\TortoiseSVN\bin;C:\Program Files\PuTTY\;C:\Program Files\Microsoft VS Code\bin;C:\Program Files\Git\cmd;C:\apache-maven-3.5.4\bin;C:\curl;C:\Program Files\nodejs\;D:\eclipes java ee\mongodb-win32-x86_64-2008plus-ssl-4.0.3\bin;C:\Users\royyzh\AppData\Roaming\npm;C:\Users\royyzh\AppData\Local\Programs\EmEditor;D:\sts-bundle\sts-3.9.5.RELEASE;;.]
2018-11-10 16:13:23.692  INFO 9436 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2018-11-10 16:13:23.693  INFO 9436 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1705 ms
2018-11-10 16:13:23.792  INFO 9436 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
2018-11-10 16:13:23.797  INFO 9436 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-11-10 16:13:23.798  INFO 9436 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-11-10 16:13:23.798  INFO 9436 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-11-10 16:13:23.798  INFO 9436 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
2018-11-10 16:13:24.698  INFO 9436 --- [           main] org.mongodb.driver.cluster               : Cluster created with settings {hosts=[royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017], mode=MULTIPLE, requiredClusterType=REPLICA_SET, serverSelectionTimeout='30000 ms', maxWaitQueueSize=500, requiredReplicaSetName='RoyYipProjectCluster-shard-0'}
2018-11-10 16:13:24.698  INFO 9436 --- [           main] org.mongodb.driver.cluster               : Adding discovered server royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017 to client view of cluster
2018-11-10 16:13:24.746  INFO 9436 --- [           main] org.mongodb.driver.cluster               : Adding discovered server royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017 to client view of cluster
2018-11-10 16:13:24.747  INFO 9436 --- [           main] org.mongodb.driver.cluster               : Adding discovered server royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017 to client view of cluster
2018-11-10 16:13:25.123  INFO 9436 --- [           main] org.mongodb.driver.cluster               : No server chosen by com.mongodb.Mongo$4@2e52fb3e from cluster description ClusterDescription{type=REPLICA_SET, connectionMode=MULTIPLE, serverDescriptions=[ServerDescription{address=royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017, type=UNKNOWN, state=CONNECTING}]}. Waiting for 30000 ms before timing out
2018-11-10 16:13:25.138  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:1, serverValue:4829}] to royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017
2018-11-10 16:13:25.149  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 4]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=9102165, setName='RoyYipProjectCluster-shard-0', canonicalAddress=royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017, hosts=[royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017], passives=[], arbiters=[], primary='royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017', tagSet=TagSet{[]}, electionId=null, setVersion=1, lastWriteDate=Sat Nov 10 16:13:26 SGT 2018, lastUpdateTimeNanos=33621241304334}
2018-11-10 16:13:25.158  INFO 9436 --- [           main] org.mongodb.driver.cluster               : No server chosen by WritableServerSelector from cluster description ClusterDescription{type=REPLICA_SET, connectionMode=MULTIPLE, serverDescriptions=[ServerDescription{address=royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, type=UNKNOWN, state=CONNECTING}, ServerDescription{address=royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 4]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=9102165, setName='RoyYipProjectCluster-shard-0', canonicalAddress=royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017, hosts=[royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017], passives=[], arbiters=[], primary='royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017', tagSet=TagSet{[]}, electionId=null, setVersion=1, lastWriteDate=Sat Nov 10 16:13:26 SGT 2018, lastUpdateTimeNanos=33621241304334}]}. Waiting for 30000 ms before timing out
2018-11-10 16:13:25.201  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:3, serverValue:4482}] to royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017
2018-11-10 16:13:25.204  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:2, serverValue:4726}] to royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017
2018-11-10 16:13:25.209  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, type=REPLICA_SET_SECONDARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 4]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=7415729, setName='RoyYipProjectCluster-shard-0', canonicalAddress=royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, hosts=[royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017], passives=[], arbiters=[], primary='royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017', tagSet=TagSet{[]}, electionId=null, setVersion=1, lastWriteDate=Sat Nov 10 16:13:26 SGT 2018, lastUpdateTimeNanos=33621301859146}
2018-11-10 16:13:25.210  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.cluster               : Monitor thread successfully connected to server with description ServerDescription{address=royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, type=REPLICA_SET_PRIMARY, state=CONNECTED, ok=true, version=ServerVersion{versionList=[4, 0, 4]}, minWireVersion=0, maxWireVersion=7, maxDocumentSize=16777216, logicalSessionTimeoutMinutes=30, roundTripTimeNanos=5801588, setName='RoyYipProjectCluster-shard-0', canonicalAddress=royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, hosts=[royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-01-uwgni.gcp.mongodb.net:27017, royyipprojectcluster-shard-00-02-uwgni.gcp.mongodb.net:27017], passives=[], arbiters=[], primary='royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017', tagSet=TagSet{[]}, electionId=7fffffff0000000000000005, setVersion=1, lastWriteDate=Sat Nov 10 16:13:26 SGT 2018, lastUpdateTimeNanos=33621302845567}
2018-11-10 16:13:25.210  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.cluster               : Setting max election id to 7fffffff0000000000000005 from replica set primary royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017
2018-11-10 16:13:25.210  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.cluster               : Setting max set version to 1 from replica set primary royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017
2018-11-10 16:13:25.210  INFO 9436 --- [ngodb.net:27017] org.mongodb.driver.cluster               : Discovered replica set primary royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017
2018-11-10 16:13:25.296  INFO 9436 --- [           main] org.mongodb.driver.connection            : Opened connection [connectionId{localValue:4, serverValue:4726}] to royyipprojectcluster-shard-00-00-uwgni.gcp.mongodb.net:27017
2018-11-10 16:13:25.698  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@327b636c: startup date [Sat Nov 10 16:13:21 SGT 2018]; root of context hierarchy
2018-11-10 16:13:25.763  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/api/contact],methods=[POST]}" onto public com.example.todoapp.models.Todo com.example.todoapp.controllers.TodoController.createContact(com.example.todoapp.models.Todo)
2018-11-10 16:13:25.765  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/api/todos/{id}],methods=[GET]}" onto public org.springframework.http.ResponseEntity<com.example.todoapp.models.Todo> com.example.todoapp.controllers.TodoController.getTodoById(java.lang.String)
2018-11-10 16:13:25.766  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/api/todos],methods=[POST]}" onto public com.example.todoapp.models.Todo com.example.todoapp.controllers.TodoController.createTodo(com.example.todoapp.models.Todo,java.lang.String)
2018-11-10 16:13:25.767  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/api/todos],methods=[GET]}" onto public java.util.List<com.example.todoapp.models.Todo> com.example.todoapp.controllers.TodoController.getAllTodos()
2018-11-10 16:13:25.767  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/api/todos/{id}],methods=[PUT]}" onto public org.springframework.http.ResponseEntity<com.example.todoapp.models.Todo> com.example.todoapp.controllers.TodoController.updateTodo(java.lang.String,com.example.todoapp.models.Todo)
2018-11-10 16:13:25.768  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/api/todos/{id}],methods=[DELETE]}" onto public org.springframework.http.ResponseEntity<?> com.example.todoapp.controllers.TodoController.deleteTodo(java.lang.String)
2018-11-10 16:13:25.771  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-11-10 16:13:25.771  INFO 9436 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-11-10 16:13:25.793  INFO 9436 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-11-10 16:13:25.793  INFO 9436 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-11-10 16:13:25.840  INFO 9436 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-11-10 16:13:25.995  INFO 9436 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
2018-11-10 16:13:26.060  INFO 9436 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2018-11-10 16:13:26.064  INFO 9436 --- [           main] com.example.todoapp.TodoappApplication   : Started TodoappApplication in 4.443 seconds (JVM running for 6.802)
2018-11-10 16:13:32.981  INFO 9436 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-11-10 16:13:32.981  INFO 9436 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2018-11-10 16:13:33.000  INFO 9436 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 18 ms
null
My Web Application went blank on private mode
nullnumbers
null
My Web Application went blank on private mode
nullnumbers

我应该怎么做才能让它发挥作用？我的代码的哪一部分需要更改，为什么？

最佳答案

有一些错误。以下是您需要进行的修复。

this.http.post(this.baseUrl + '/api/todos/', todoData, "a")

"a" 在 POST 调用中做什么。您可以在 todo.service.ts

中声明的 createTodo 方法中删除它

在Todo.java中，变量被声明为numbers，setter被声明为

public void setNumber(String number) {

将其更改为

 public void setNumbers(String numbers) {
    this.numbers = numbers;
 }

现在您可以将 TodoController.java 中的 createTodo 方法更新为以下内容

@PostMapping("/todos")
public Todo createTodo(@Valid @RequestBody Todo todo) {

关于java - Spring Boot 无法检测我输入的值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53237650/

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java - Spring Boot 无法检测我输入的值