lemonBeans/ruoyi-admin/src/main/java/com/ruoyi/web/controller/wx/AttachmngsController.java

package com.ruoyi.web.controller.wx;


import com.ruoyi.common.core.domain.AjaxResult;
import com.ruoyi.system.domain.AttachMngs;
import com.ruoyi.system.service.IAttachMngsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import java.util.Map;

@RestController
@RequestMapping("/attachmngs")
public class AttachmngsController {

    @Autowired
    private IAttachMngsService attachMngsService;

    /**
     * 上传图片
     *
     * @param file 图片
     * @return
     * @throws Exception
     */
    @PostMapping
    public AjaxResult updateAttachmngs(@RequestParam("avatarfile") MultipartFile file,
                                       @RequestParam("attachId") Long attachId,
                                       HttpServletRequest request) throws Exception {
        if (file.isEmpty()) {
            return AjaxResult.error("上传失败请重试1");
        }
        byte[] bytes = file.getBytes();
        AttachMngs attachMngs = new AttachMngs();
        attachMngs.setSysId(1L);
        attachMngs.setAttachId(attachId);
        attachMngs.setAttachFile(toObjects(bytes));

        Integer i = attachMngsService.insertAttachMngs(attachMngs);

        if (i != 1) {
            return AjaxResult.error("上传失败请重试2");
        }

        // 拼接url
        String serverName = request.getServerName();
        int serverPort = request.getServerPort();

        return AjaxResult.success("操作成功", "http://" + serverName + ":" + serverPort + "/attachmngs/img/" + attachId);
    }

    /**
     * 获取图片
     *
     * @param attachId
     * @return
     */
    @GetMapping(value = "/img/{attachId}", produces = MediaType.IMAGE_JPEG_VALUE)
    public byte[] getImg(@PathVariable("attachId") String attachId) {
        Byte[] img = attachMngsService.getImg(attachId);
        return toPrimitives(img);
    }

    // byte[] to Byte[]
    private Byte[] toObjects(byte[] bytesPrim) {
        Byte[] bytes = new Byte[bytesPrim.length];

        int i = 0;
        for (byte b : bytesPrim) bytes[i++] = b; // Autoboxing

        return bytes;
    }

    private byte[] toPrimitives(Byte[] oBytes)
    {
        byte[] bytes = new byte[oBytes.length];

        for(int i = 0; i < oBytes.length; i++) {
            bytes[i] = oBytes[i];
        }

        return bytes;
    }
}