PictureService

最新推荐文章于 2025-09-08 22:40:31 发布

转载最新推荐文章于 2025-09-08 22:40:31 发布 · 114 阅读

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原文链接：http://www.cnblogs.com/tonggc1668/p/11218640.html

文章标签：

#json #数据库 #java

本文介绍了一个基于Spring框架的图床服务实现方案，包括图片上传、查询及删除等功能，并利用Spring Cache进行缓存管理，提高系统响应速度。

package me.zhengjie.tools.service;

import me.zhengjie.tools.domain.Picture;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.web.multipart.MultipartFile;

/**
 * @author jie
 * @date 2018-12-27
 */
@CacheConfig(cacheNames = "picture")
public interface PictureService {

    /**
     * 上传图片
     * @param file
     * @param username
     * @return
     */
    @CacheEvict(allEntries = true)
    Picture upload(MultipartFile file, String username);

    /**
     * 根据ID查询
     * @param id
     * @return
     */
    @Cacheable(key = "#p0")
    Picture findById(Long id);

    /**
     * 删除图片
     * @param picture
     */
    @CacheEvict(allEntries = true)
    void delete(Picture picture);
}

package me.zhengjie.tools.service.impl;

import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import me.zhengjie.common.exception.BadRequestException;
import me.zhengjie.common.utils.FileUtil;
import me.zhengjie.common.utils.ValidationUtil;
import me.zhengjie.tools.domain.Picture;
import me.zhengjie.tools.repository.PictureRepository;
import me.zhengjie.tools.service.PictureService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.io.FileSystemResource;
import org.springframework.http.*;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.util.Arrays;
import java.util.Optional;

/**
 * @author jie
 * @date 2018-12-27
 */
@Slf4j
@Service(value = "pictureService")
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true, rollbackFor = Exception.class)
public class PictureServiceImpl implements PictureService {

    @Autowired
    private PictureRepository pictureRepository;

    public static final String SUCCESS = "success";

    public static final String CODE = "code";

    public static final String MSG = "msg";

    @Override
    @Transactional(rollbackFor = Throwable.class)
    public Picture upload(MultipartFile multipartFile, String username) {
        File file = FileUtil.toFile(multipartFile);
        //将参数合成一个请求
        RestTemplate rest = new RestTemplate();

        FileSystemResource resource = new FileSystemResource(file);
        MultiValueMap<String, Object> param = new LinkedMultiValueMap<>();
        param.add("smfile", resource);

        //设置头部，必须
        HttpHeaders headers = new HttpHeaders();
        headers.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));
        headers.add("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.99 Safari/537.36");

        HttpEntity<MultiValueMap<String, Object>> httpEntity = new HttpEntity<MultiValueMap<String, Object>>(param,headers);
        ResponseEntity<String> responseEntity = rest.exchange("https://sm.ms/api/upload", HttpMethod.POST, httpEntity, String.class);

        JSONObject jsonObject = JSONUtil.parseObj(responseEntity.getBody());
        Picture picture = null;
        if(!jsonObject.get(CODE).toString().equals(SUCCESS)){
           throw new BadRequestException(jsonObject.get(MSG).toString());
        }
        //转成实体类
        picture = JSON.parseObject(jsonObject.get("data").toString(), Picture.class);
        picture.setSize(FileUtil.getSize(Integer.valueOf(picture.getSize())));
        picture.setUsername(username);
        picture.setFilename(FileUtil.getFileNameNoEx(multipartFile.getOriginalFilename())+FileUtil.getExtensionName(multipartFile.getOriginalFilename()));
        pictureRepository.save(picture);
        //删除临时文件
        FileUtil.deleteFile(file);
        return picture;
    }

    @Override
    public Picture findById(Long id) {
        Optional<Picture> picture = pictureRepository.findById(id);
        ValidationUtil.isNull(picture,"Picture","id",id);
        return picture.get();
    }

    @Override
    @Transactional(rollbackFor = Exception.class)
    public void delete(Picture picture) {
        RestTemplate rest = new RestTemplate();
        try {
            ResponseEntity<String> str = rest.getForEntity(picture.getDelete(), String.class);
            if(str.getStatusCode().is2xxSuccessful()){
                pictureRepository.delete(picture);
            }
        //如果删除的地址出错，直接删除数据库数据
        } catch(Exception e){
            pictureRepository.delete(picture);
        }

    }
}

package me.zhengjie.tools.service.query;

import me.zhengjie.common.utils.PageUtil;
import me.zhengjie.tools.domain.Picture;
import me.zhengjie.tools.repository.PictureRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cache.annotation.CacheConfig;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.ObjectUtils;
import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import java.util.ArrayList;
import java.util.List;

/**
 * @author jie
 * @date 2018-12-03
 */
@Service
@CacheConfig(cacheNames = "picture")
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true, rollbackFor = Exception.class)
public class PictureQueryService {

    @Autowired
    private PictureRepository pictureRepository;

    /**
     * 分页
     */
    @Cacheable(keyGenerator = "keyGenerator")
    public Object queryAll(Picture picture, Pageable pageable){
        return PageUtil.toPage(pictureRepository.findAll(new Spec(picture),pageable));
    }

    class Spec implements Specification<Picture> {

        private Picture picture;

        public Spec(Picture picture){
            this.picture = picture;
        }

        @Override
        public Predicate toPredicate(Root<Picture> root, CriteriaQuery<?> criteriaQuery, CriteriaBuilder cb) {

            List<Predicate> list = new ArrayList<Predicate>();

            if(!ObjectUtils.isEmpty(picture.getFilename())){
                /**
                 * 模糊
                 */
                list.add(cb.like(root.get("filename").as(String.class),"%"+picture.getFilename()+"%"));
            }

            Predicate[] p = new Predicate[list.size()];
            return cb.and(list.toArray(p));
        }
    }
}

package me.zhengjie.tools.config;

import org.springframework.boot.web.servlet.MultipartConfigFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.servlet.MultipartConfigElement;
import java.io.File;

/**
 * @date 2018-12-28
 * @author https://blog.youkuaiyun.com/llibin1024530411/article/details/79474953
 */
@Configuration
public class MultipartConfig {

    /**
     * 文件上传临时路径
     */
    @Bean
    MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        String location = System.getProperty("user.dir") + "/data/tmp";
        File tmpFile = new File(location);
        if (!tmpFile.exists()) {
            tmpFile.mkdirs();
        }
        factory.setLocation(location);
        return factory.createMultipartConfig();
    }
}

package me.zhengjie.tools.domain;

import lombok.Data;
import org.hibernate.annotations.CreationTimestamp;
import javax.persistence.*;
import java.io.Serializable;
import java.sql.Timestamp;

/**
 * sm.ms图床
 *
 * @author jie
 * @date 2018-12-27
 */
@Data
@Entity
@Table(name = "picture")
public class Picture implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String filename;

    private String url;

    private String size;

    private String height;

    private String width;

    /**
     * delete URl
     */
    @Column(name = "delete_url")
    private String delete;

    private String username;

    @CreationTimestamp
    private Timestamp createTime;

    @Override
    public String toString() {
        return "Picture{" +
                "filename='" + filename + '\'' +
                '}';
    }
}

package me.zhengjie.tools.rest;

import me.zhengjie.common.aop.log.Log;
import me.zhengjie.common.utils.RequestHolder;
import me.zhengjie.core.utils.JwtTokenUtil;
import me.zhengjie.tools.domain.Picture;
import me.zhengjie.tools.service.PictureService;
import me.zhengjie.tools.service.query.PictureQueryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.security.access.prepost.PreAuthorize;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;
import java.util.HashMap;
import java.util.Map;

/**
 * @author 郑杰
 * @date 2018/09/20 14:13:32
 */
@RestController
@RequestMapping("/api")
public class PictureController {

    @Autowired
    private PictureService pictureService;

    @Autowired
    private PictureQueryService pictureQueryService;

    @Autowired
    private JwtTokenUtil jwtTokenUtil;

    @Log(description = "查询图片")
    @PreAuthorize("hasAnyRole('ADMIN','PICTURE_ALL','PICTURE_SELECT')")
    @GetMapping(value = "/pictures")
    public ResponseEntity getRoles(Picture resources, Pageable pageable){
        return new ResponseEntity(pictureQueryService.queryAll(resources,pageable),HttpStatus.OK);
    }

    /**
     * 上传图片
     * @param file
     * @return
     * @throws Exception
     */
    @Log(description = "上传图片")
    @PreAuthorize("hasAnyRole('ADMIN','PICTURE_ALL','PICTURE_UPLOAD')")
    @PostMapping(value = "/pictures")
    public ResponseEntity upload(@RequestParam MultipartFile file){
        String userName = jwtTokenUtil.getUserName(RequestHolder.getHttpServletRequest());
        Picture picture = pictureService.upload(file,userName);
        Map map = new HashMap();
        map.put("errno",0);
        map.put("id",picture.getId());
        map.put("data",new String[]{picture.getUrl()});
        return new ResponseEntity(map,HttpStatus.OK);
    }

    /**
     * 删除图片
     * @param id
     * @return
     */
    @Log(description = "删除图片")
    @PreAuthorize("hasAnyRole('ADMIN','PICTURE_ALL','PICTURE_DELETE')")
    @DeleteMapping(value = "/pictures/{id}")
    public ResponseEntity delete(@PathVariable Long id) {
        pictureService.delete(pictureService.findById(id));
        return new ResponseEntity(HttpStatus.OK);
    }
}

package me.zhengjie.tools.repository;

import me.zhengjie.tools.domain.Picture;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

/**
 * @author jie
 * @date 2018-12-27
 */
public interface PictureRepository extends JpaRepository<Picture,Long>, JpaSpecificationExecutor {
}