Java com.springboot.todoController.todoController中的字段todoService需要类型为';com.springboot.todo.TodoService';那是找不到的

Java com.springboot.todoController.todoController中的字段todoService需要类型为';com.springboot.todo.TodoService';那是找不到的,java,spring,spring-boot,Java,Spring,Spring Boot,我是Spring boot的新手…我在运行控制器时遇到了一个问题 说明: com.springboot.todoController.todoController中的字段todoService 需要类型为“com.springboot.todo.TodoService”的bean,该bean可以 找不到 行动: 考虑在中定义“com.springboot.todo.TodoService”类型的bean 您的配置 下面是我的代码 Todo.java package com.springboot.

我是Spring boot的新手…我在运行控制器时遇到了一个问题

说明:

com.springboot.todoController.todoController中的字段todoService 需要类型为“com.springboot.todo.TodoService”的bean,该bean可以 找不到

行动:

考虑在中定义“com.springboot.todo.TodoService”类型的bean 您的配置

下面是我的代码

Todo.java

package com.springboot.todoBean;

import java.util.Date;

public class Todo {
    private int id;
    private String user;

    private String desc;

    private Date targetDate;
    private boolean isDone;

    public Todo() {}

    public Todo(int id, String user, String desc, Date targetDate, boolean isDone) {
        super();
        this.id = id;
        this.user = user;
        this.desc = desc;
        this.targetDate = targetDate;
        this.isDone = isDone;
    }


    public int getId() {
        return id;
    }


    public String getUser() {
        return user;
    }


    public String getDesc() {
        return desc;
    }


    public Date getTargetDate() {
        return targetDate;
    }


    public boolean isDone() {
        return isDone;
    }

}
package com.springboot.todo;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.stereotype.Service;

import com.springboot.todoBean.Todo;

@Service
public class TodoService {
    private static List<Todo> todos = new ArrayList<Todo>();
    private static int todoCount = 3;


    static {
        todos.add(new Todo(1, "Jack", "Learn Spring MVC", new Date(), false));
        todos.add(new Todo(2, "Jack", "Learn Struts", new Date(), false));
        todos.add(new Todo(3, "Jill", "Learn hibernate", new Date(), false));
    }

    public List<Todo> retrieveTodos(String user){
        List<Todo> filteredTodos = new ArrayList<Todo>();
        for (Todo todo : todos) {
            if(todo.getUser().equals(user))
                filteredTodos.add(todo);
        }
        return filteredTodos;
    }

    public Todo addTodo(String name, String desc,
            Date targetDate, boolean isDone) {
        Todo todo = new Todo(++todoCount, name, desc, targetDate, isDone);
        todos.add(todo);
        return todo;
    }

    public Todo retrievedTodo(int id) {
        for(Todo todo: todos) {
            if(todo.getId() == id)
                return todo;    
        }
        return null;
    }
}
package com.springboot.todoController;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import com.springboot.todo.TodoService;
import com.springboot.todoBean.Todo;

@RestController
public class TodoController {

    @Autowired
    private TodoService todoService;

    @GetMapping("/users/{name}/todos")
    public List<Todo> retrieveTodo(@PathVariable String name){
        return todoService.retrieveTodos(name);
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(TodoController.class, args);
    }
}
TodoService.java

package com.springboot.todoBean;

import java.util.Date;

public class Todo {
    private int id;
    private String user;

    private String desc;

    private Date targetDate;
    private boolean isDone;

    public Todo() {}

    public Todo(int id, String user, String desc, Date targetDate, boolean isDone) {
        super();
        this.id = id;
        this.user = user;
        this.desc = desc;
        this.targetDate = targetDate;
        this.isDone = isDone;
    }


    public int getId() {
        return id;
    }


    public String getUser() {
        return user;
    }


    public String getDesc() {
        return desc;
    }


    public Date getTargetDate() {
        return targetDate;
    }


    public boolean isDone() {
        return isDone;
    }

}
package com.springboot.todo;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.stereotype.Service;

import com.springboot.todoBean.Todo;

@Service
public class TodoService {
    private static List<Todo> todos = new ArrayList<Todo>();
    private static int todoCount = 3;


    static {
        todos.add(new Todo(1, "Jack", "Learn Spring MVC", new Date(), false));
        todos.add(new Todo(2, "Jack", "Learn Struts", new Date(), false));
        todos.add(new Todo(3, "Jill", "Learn hibernate", new Date(), false));
    }

    public List<Todo> retrieveTodos(String user){
        List<Todo> filteredTodos = new ArrayList<Todo>();
        for (Todo todo : todos) {
            if(todo.getUser().equals(user))
                filteredTodos.add(todo);
        }
        return filteredTodos;
    }

    public Todo addTodo(String name, String desc,
            Date targetDate, boolean isDone) {
        Todo todo = new Todo(++todoCount, name, desc, targetDate, isDone);
        todos.add(todo);
        return todo;
    }

    public Todo retrievedTodo(int id) {
        for(Todo todo: todos) {
            if(todo.getId() == id)
                return todo;    
        }
        return null;
    }
}
package com.springboot.todoController;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import com.springboot.todo.TodoService;
import com.springboot.todoBean.Todo;

@RestController
public class TodoController {

    @Autowired
    private TodoService todoService;

    @GetMapping("/users/{name}/todos")
    public List<Todo> retrieveTodo(@PathVariable String name){
        return todoService.retrieveTodos(name);
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(TodoController.class, args);
    }
}
包com.springboot.todo;
导入java.util.ArrayList;
导入java.util.Date;
导入java.util.List;
导入org.springframework.stereotype.Service;
导入com.springboot.todoBean.Todo;
@服务
公共类TodoService{
private static List todos=new ArrayList();
私有静态int todoCount=3;
静止的{
add(新Todo(1,“Jack”,“LearnSpringMVC”,newDate(),false));
add(新Todo(2,“Jack”,“learnstruts”,newdate(),false));
add(新Todo(3,“吉尔”,“学习休眠”,newdate(),false));
}
公共列表检索路径(字符串用户){
List filteredTodos=new ArrayList();
for(待办事项:待办事项){
if(todo.getUser().equals(user))
filteredTodos.add(todo);
}
返回filteredTodos;
}
公共Todo ADDDTODO(字符串名称、字符串描述、,
日期targetDate,布尔值isDone){
Todo Todo=新Todo(++todoCount、名称、描述、目标日期、isDone);
待办事项。添加(待办事项);
返回待办事项;
}
公共待办事项检索待办事项(int id){
for(待办事项:待办事项){
if(todo.getId()==id)
返回待办事项;
}
返回null;
}
}
TodoController.java

package com.springboot.todoBean;

import java.util.Date;

public class Todo {
    private int id;
    private String user;

    private String desc;

    private Date targetDate;
    private boolean isDone;

    public Todo() {}

    public Todo(int id, String user, String desc, Date targetDate, boolean isDone) {
        super();
        this.id = id;
        this.user = user;
        this.desc = desc;
        this.targetDate = targetDate;
        this.isDone = isDone;
    }


    public int getId() {
        return id;
    }


    public String getUser() {
        return user;
    }


    public String getDesc() {
        return desc;
    }


    public Date getTargetDate() {
        return targetDate;
    }


    public boolean isDone() {
        return isDone;
    }

}
package com.springboot.todo;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import org.springframework.stereotype.Service;

import com.springboot.todoBean.Todo;

@Service
public class TodoService {
    private static List<Todo> todos = new ArrayList<Todo>();
    private static int todoCount = 3;


    static {
        todos.add(new Todo(1, "Jack", "Learn Spring MVC", new Date(), false));
        todos.add(new Todo(2, "Jack", "Learn Struts", new Date(), false));
        todos.add(new Todo(3, "Jill", "Learn hibernate", new Date(), false));
    }

    public List<Todo> retrieveTodos(String user){
        List<Todo> filteredTodos = new ArrayList<Todo>();
        for (Todo todo : todos) {
            if(todo.getUser().equals(user))
                filteredTodos.add(todo);
        }
        return filteredTodos;
    }

    public Todo addTodo(String name, String desc,
            Date targetDate, boolean isDone) {
        Todo todo = new Todo(++todoCount, name, desc, targetDate, isDone);
        todos.add(todo);
        return todo;
    }

    public Todo retrievedTodo(int id) {
        for(Todo todo: todos) {
            if(todo.getId() == id)
                return todo;    
        }
        return null;
    }
}
package com.springboot.todoController;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import com.springboot.todo.TodoService;
import com.springboot.todoBean.Todo;

@RestController
public class TodoController {

    @Autowired
    private TodoService todoService;

    @GetMapping("/users/{name}/todos")
    public List<Todo> retrieveTodo(@PathVariable String name){
        return todoService.retrieveTodos(name);
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(TodoController.class, args);
    }
}
包com.springboot.todoController;
导入java.util.List;
导入org.springframework.beans.factory.annotation.Autowired;
导入org.springframework.boot.SpringApplication;
导入org.springframework.boot.autoconfigure.EnableAutoConfiguration;
导入org.springframework.web.bind.annotation.GetMapping;
导入org.springframework.web.bind.annotation.PathVariable;
导入org.springframework.web.bind.annotation.RestController;
导入com.springboot.todo.TodoService;
导入com.springboot.todoBean.Todo;
@RestController
公共类TodoController{
@自动连线
私有TodoService TodoService;
@GetMapping(“/users/{name}/todos”)
公共列表检索路径(@PathVariable字符串名称){
返回到doService.retrieveTodos(名称);
}
公共静态void main(字符串[]args)引发异常{
run(TodoController.class,args);
}
}

我已经在TodoService中添加了注释@Service来告诉spring boot它是一个bean,但它仍然无法识别,有人能告诉我如何解决这个问题吗?谢谢

由于应用程序未扫描到服务,因此生成了错误。 上述代码有几个问题:

  • 请将所有包的大小写设置为小写-java约定
  • 请将main移到另一个类中,并用@SpringBootApplication对其进行注释

  • 三,。默认情况下,spring引导应用程序将扫描包中包含的bean,其中定义了来自2的类。您可以将来自2的类放入服务和控制器的公共包中

    生成错误是因为应用程序未扫描到服务。 上述代码有几个问题:

  • 请将所有包的大小写设置为小写-java约定
  • 请将main移到另一个类中,并用@SpringBootApplication对其进行注释

  • 三,。默认情况下,spring引导应用程序将扫描包中包含的bean,其中定义了来自2的类。您可以将来自2的类放入服务和控制器的公共包中

    创建一个单独的类,如下所示,用于启动spring引导应用程序。另外,请注意,与其他控制器、服务等类相比,下面的类应该位于包层次结构的更高级别

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

    创建一个单独的类,如下所示,用于启动spring引导应用程序。另外,请注意,与其他控制器、服务等类相比,下面的类应该位于包层次结构的更高级别

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

    你的主要课程是什么?把它全部寄出去。在源代码布局中,它应该是“com.springboot”包。用@SpringBootApplication注释的类在哪里?它应该在com.springboot.todo的父包中。您的主类在哪个包中?把它全部寄出去。在源代码布局中,它应该是“com.springboot”包。用@SpringBootApplication注释的类在哪里?它应该在com.springboot.todo的父包中。我建议将“Why don't you write”更改为更中性的内容,以使其成为一个好答案。我建议将“Why don't you write”更改为更中性的内容,以使其成为一个好答案。