springboot与springmvc基础入门讲解

package cn.tedu;
//充当MVC模式里的M层model：封装数据
public class Car{
    //提供属性 + get/set/toString
    private int id;
    private String name;
    private String type;
    private String color;
    private double price;
    // get/set /toString
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }
    public String getColor() {
        return color;
    }
    public void setColor(String color) {
        this.color = color;
    }
    public double getPrice() {
        return price;
    }
    public void setPrice(double price) {
        this.price = price;
    }
    //如果没重写，就是用Object的toString()返回的是地址值。
    //没重了，就是返回属性值。
    @Override
    public String toString() {
        return "Car{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", type='" + type + '\'' +
                ", color='" + color + '\'' +
                ", price=" + price +
                '}';
    }
}

package cn.tedu;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
//职责：接受请求+做出响应
@RestController //接受浏览器发来的请求
@RequestMapping("car")//规定了url的写法
public class CarController {
    //访问http://localhost:8080/car/find，
//在浏览器展示了{"id":718,"name":"保时捷","type":"Cayman T","color":"红色","price":641000.0}
    @RequestMapping("find")
    public Car find(){
        Car c = new Car();
        c.setId(718);
        c.setName("保时捷");
        c.setType("Cayman T");
        c.setColor("红色");
        c.setPrice(641000);
        return c;//把结果返回给了浏览器
    }
    //访问http://localhost:8080/car/save ，在浏览器展示abc
    @RequestMapping("save")
    public String save(){
        //接受请求，并返回数据
        return "abc";
    }
    //访问http://localhost:8080/car/get ，在控制台打印123
    @RequestMapping("get")//规定了url的写法
    public void get(){
        System.out.println(123);
    }
}