001-Servlet

Introduction

First assignment of four arithmetic of int and float

Usage

After imported to IDEA, you can run it at localhost:8080/houduanyyds/

By URL

Manually modify the url to get the result

Error

Floating point calculation只能精确到小数点后五位

Floating point calculation计算时变量后可加f或F，不影响计算结果<

Learning process

Document learning

code

package com.example.firstspringboot1.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class Main1 {

    @GetMapping("/houduanyyds")
    public String helloWorld(){
        return "Hello,world!";
    }

    @GetMapping("/houduanyyds/add")
    public int add (@RequestParam int a, @RequestParam int b){return a + b;
    }

    @GetMapping("/houduanyyds/subtract")
    public int subtract(@RequestParam int a,@RequestParam int b){return a - b;
    }

    @GetMapping("/houduanyyds/multiply")
    public int mutiply(@RequestParam int a,@RequestParam int b){return a * b;
    }

    @GetMapping("/houduanyyds/divide")
    public int divide(@RequestParam int a,@RequestParam int b){return a / b;
    }

    @GetMapping("/houduanyyds/addpoint")
    public float add (@RequestParam float a, @RequestParam float b){return a + b;
    }

    @GetMapping("/houduanyyds/subtractpoint")
    public float subtract(@RequestParam float a,@RequestParam float b){return a - b;
    }

    @GetMapping("/houduanyyds/multiplypoint")
    public float mutiply(@RequestParam float a,@RequestParam float b){return a * b;
    }

    @GetMapping("/houduanyyds/dividepoint")
    public float divide(@RequestParam float a,@RequestParam float b){return a / b;
    }

}

PJY