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 );

     }

}