VIP23/springBoot/src/main/java/com/sf/springboot/controller/BookController.java

package com.sf.springboot.controller;

import com.sf.springboot.dto.Result;
import com.sf.springboot.entity.Book;
import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpSessionActivationListener;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

//@Controller
//@ResponseBody
//组合注解  @RestController = @Controller + @ResponseBody
@RestController
public class BookController {

    /**
     * 添加图书
     * @return
     */
    @RequestMapping("/addBook")
    public Result addBook(Book book){
        System.out.println(book);
        return new Result();
    }

    /**
     * 添加图书
     * @return
     */
    @RequestMapping("/addBook2")
    public Result addBook2(@RequestBody Book book){
        System.out.println(book);
        return new Result();
    }


    /**
     * 更新图书
     * @return
     */
    @RequestMapping("/updateBook")
    public Result updateBook(Book book){
        System.out.println(book);
        return new Result();
    }

    /**
     * 更新图书
     * @return
     */
    @RequestMapping("/updateBook2")
    public Result updateBook2(@RequestBody Book book){
        System.out.println(book);
        return new Result();
    }


    /**
     * 删除图书
     * @param bookId
     * @return
     */
    @RequestMapping("/deleteBook")
    public Result deleteBook(Integer bookId){
        System.out.println(bookId);
        return new Result();
    }

    /**
     * 删除图书的方式二
     * @param book
     * @return
     */
    @RequestMapping("/deleteBook2")
    public Result deleteBook2(@RequestBody Book book){
        System.out.println(book.getBookId());
        return new Result();
    }

    @RequestMapping("/getBookList")
    public Result getBookList(){
        System.out.println("查询图书。。。");
        return new Result();
    }

    /**
     * 根据图书的id去查询图书的详情
     */

    @RequestMapping("/getBookInfo")
    public Result getBookInfo(Integer bookId){
        System.out.println(bookId);
        return new Result();
    }

    /**
     * 根据图书的id去查询图书的详情2
     */

    @RequestMapping("/getBookInfo2")
    public Result getBookInfo2(@RequestBody Book book){
        System.out.println(book.getBookId());
        return new Result();
    }

    /**
     * 单文件上传
     * @return
     */
    @RequestMapping("/uploadFile")
        public Object uploadFile(MultipartFile file) throws IOException {
        System.out.println("文件上传。。。"+file.getOriginalFilename());
        file.transferTo(new File("d:\\"+file.getOriginalFilename()));
        Map map = new HashMap();
        map.put("code",200);
        map.put("msg","OK");
        return map;
    }

    /**
     * 多文件上传
     * @return
     */
    @RequestMapping("/uploadFiles")
    public Object uploadFiles(MultipartFile[] file) throws IOException {
        for (MultipartFile multipartFile : file) {
            System.out.println("文件上传。。。"+multipartFile.getOriginalFilename());
            multipartFile.transferTo(new File("d:\\"+multipartFile.getOriginalFilename()));
        }
        Map map = new HashMap();
        map.put("code",200);
        map.put("msg","OK");
        return map;
    }


    /**
     * 文件下载
     */
    @GetMapping(value = "/downLoad")
    public ResponseEntity<byte[]> downLoad() throws IOException {
        System.out.println("文件下载...");
        //获取下载文件的输入流
        BufferedInputStream in = new BufferedInputStream(new FileInputStream(new File("d:\\123.jpg")));
        //创建下载缓冲区
        byte[] body = new byte[in.available()];
        //将输入流数据读入缓冲区
        in.read(body);
        //创建响应头
        HttpHeaders headers = new HttpHeaders();
        //构建文件名称
        String fileName="123.jpg";
        headers.add("Content-Disposition", "attachment;filename="+fileName);
        //创建响应状态码
        HttpStatus ok = HttpStatus.OK;
        ResponseEntity<byte[]> response = new ResponseEntity<>(body,headers,ok);
        return response;
    }
}