文件上传下载PDF预览

不念不忘少年蓝@ 2022-04-10 08:47 314阅读 0赞

1. 创建数据库

--创建文件对象表
    CREATE TABLE sys_file (
      id bigint NOT NULL identity(1,1),
      name nvarchar(100)，--文件名称
      size nvarchar(100)，--文件大小
      type int DEFAULT NULL ,-- '文件类型',
      url varchar(200) DEFAULT NULL ,-- 'URL地址',
      create_date datetime DEFAULT NULL--'创建时间',
      PRIMARY KEY (id)
    )

2. 创建文件对象

package com.lifp.common.domain;
    
    import java.io.Serializable;
    import java.util.Date;
    
    
    public class FileDO implements Serializable {
        private static final long serialVersionUID = 1L;
    
        //
        private Long id;
        // 文件类型
        private Integer type;
        // URL地址
        private String url;
        // 创建时间
        private Date createDate;
        //文件名称
        private String name;
        //文件大小
        private String size;
    
    
        public FileDO() {
            super();
        }
    
    
        public FileDO(String name,String size, Integer type, String url, Date createDate) {
            super();
            this.name=name;
            this.size=size;
            this.type = type;
            this.url = url;
            this.createDate = createDate;
        }
    
    
        /**
         * 设置：
         */
        public void setId(Long id) {
            this.id = id;
        }
    
        /**
         * 获取：
         */
        public Long getId() {
            return id;
        }
    
        /**
         * 设置：文件类型
         */
        public void setType(Integer type) {
            this.type = type;
        }
    
        /**
         * 获取：文件类型
         */
        public Integer getType() {
            return type;
        }
    
        /**
         * 设置：URL地址
         */
        public void setUrl(String url) {
            this.url = url;
        }
    
        /**
         * 获取：URL地址
         */
        public String getUrl() {
            return url;
        }
    
        /**
         * 设置：创建时间
         */
        public void setCreateDate(Date createDate) {
            this.createDate = createDate;
        }
    
        /**
         * 获取：创建时间
         */
        public Date getCreateDate() {
            return createDate;
        }
    
        public String getName() {
    		return name;
    	}
    
    
    	public void setName(String name) {
    		this.name = name;
    	}
    
    
    	public String getSize() {
    		return size;
    	}
    
    
    	public void setSize(String size) {
    		this.size = size;
    	}
    
    
    	@Override
        public String toString() {
            return "FileDO{" +
                    "id=" + id +
                    ", name=" + name +
                    ", size=" + size +
                    ", type=" + type +
                    ", url='" + url + '\'' +
                    ", createDate=" + createDate +
                    '}';
        }
    }

3. Dao

package com.lifp.common.dao;
    
    
    import java.util.List;
    import java.util.Map;
    
    import org.apache.ibatis.annotations.Mapper;
    
    import com.lifp.common.domain.FileDO;
    
    @Mapper
    public interface FileDao {
    
    	FileDO get(Long id);
    	
    	List<FileDO> list(Map<String,Object> map);
    	
    	int count(Map<String,Object> map);
    	
    	int save(FileDO file);
    	
    	int update(FileDO file);
    	
    	int remove(Long id);
    	
    	int batchRemove(Long[] ids);
    }

4. Mapper

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    
    <mapper namespace="com.lifp.common.dao.FileDao">
    
    	<select id="get" resultType="com.lifp.common.domain.FileDO">
    		select id,name,size,type,url,create_date from sys_file where name LIKE '%'+#{name}+'%'
    	</select>
    
    	<select id="list" resultType="com.lifp.common.domain.FileDO">
    		select id,name,size,type,url,create_date from sys_file
            <where>  
    		  		  <if test="id != null and id != ''"> and id = #{id} </if>
    		  		  <if test="name != null and name != ''"> and name LIKE '%'+#{name}+'%' </if>
    		  		  <if test="type != null and type != ''"> and type = #{type} </if>
    		  		  <if test="url != null and url != ''"> and url = #{url} </if>
    		  		  <if test="createDate != null and createDate != ''"> and create_date = #{createDate} </if>
    		</where>
            <choose>
                <when test="sort != null and sort.trim() != ''">
                    order by ${sort} ${order}
                </when>
    			<otherwise>
                    order by id desc
    			</otherwise>
            </choose>
    
    
    
    	</select>
    	
     	<select id="count" resultType="int">
    		select count(*) from sys_file
    		 <where>  
    		  		  <if test="id != null and id != ''"> and id = #{id} </if>
    		  		  <if test="name != null and name != ''"> and name LIKE '%'+#{name}+'%' </if>
    		  		  <if test="type != null and type != ''"> and type = #{type} </if>
    		  		  <if test="url != null and url != ''"> and url = #{url} </if>
    		  		  <if test="createDate != null and createDate != ''"> and create_date = #{createDate} </if>
    		  		</where>
    	</select>
    	 
    	<insert id="save" parameterType="com.lifp.common.domain.FileDO" useGeneratedKeys="true" keyProperty="id">
    		insert into sys_file
    		(
    			name,
    			size,
    			type, 
    			url, 
    			create_date
    		)
    		values
    		(
    			#{name}, 
    			#{size}, 
    			#{type}, 
    			#{url}, 
    			#{createDate}
    		)
    	</insert>
    	 
    	<update id="update" parameterType="com.lifp.common.domain.FileDO">
    		update sys_file 
    		<set>
    			<if test="name != null">name = #{name}, </if>
    			<if test="size != null">size = #{size}, </if>
    			<if test="type != null">type = #{type}, </if>
    			<if test="url != null">url = #{url}, </if>
    			<if test="createDate != null">create_date = #{createDate}</if>
    		</set>
    		where id = #{id}
    	</update>
    	
    	<delete id="remove">
    		delete from sys_file where id = #{value}
    	</delete>
    	
    	<delete id="batchRemove">
    		delete from sys_file where id in 
    		<foreach item="id" collection="array" open="(" separator="," close=")">
    			#{id}
    		</foreach>
    	</delete>
    
    </mapper>

5. mabatis配置 application.xml

server.port=8081
    demo.uploadPath=C:/var/uploaded_files/
    spring.datasource.driver=com.microsoft.sqlserver.jdbc.SQLServerDriver
    spring.datasource.url=jdbc:sqlserver://127.0.0.1:1433;DatabaseName=LiangShanHeroes
    spring.datasource.username=lifangping
    spring.datasource.password=123
    #\u5B9A\u4E49\u521D\u59CB\u8FDE\u63A5\u6570
    spring.datasource.initialSize=0
    #\u5B9A\u4E49\u6700\u5927\u8FDE\u63A5\u6570
    spring.datasource.maxActive=20
    #\u5B9A\u4E49\u6700\u5927\u7A7A\u95F2
    spring.datasource.maxIdle=20
    #\u5B9A\u4E49\u6700\u5C0F\u7A7A\u95F2
    spring.datasource.minIdle=1
    #\u5B9A\u4E49\u6700\u957F\u7B49\u5F85\u65F6\u95F4
    spring.datasource.maxWait=60000
    
    #注意：mybatis配置文件
    mybatis.config-locations=classpath:mybatis/mybatis-config.xml
    mybatis.mapper-locations: classpath:mapper/*.xml  
    #注意：一定要对应mapper映射xml文件的所在路径
    mybatis.type-aliases-package: com.lifp.model  
    # 注意：对应实体类的路径
    #开启开启驼峰命名转换
    mybatis.configuration.mapUnderscoreToCamelCase=true
    #打印sql日志
    logging.level.com.lifp.common.dao=debug

6. FileService

package com.lifp.common.service;
    
    
    import java.util.List;
    import java.util.Map;
    
    import com.lifp.common.domain.FileDO;
    
    public interface FileService {
    	
    	FileDO get(Long id);
    	
    	List<FileDO> list(Map<String, Object> map);
    	
    	int count(Map<String, Object> map);
    	
    	int save(FileDO sysFile);
    	
    	int update(FileDO sysFile);
    	
    	int remove(Long id);
    	
    	int batchRemove(Long[] ids);
    
    	/**
    	 * 判断一个文件是否存在
    	 * @param url FileDO中存的路径
    	 * @return
    	 */
        Boolean isExist(String url);
    }

7. FileServiceImpl

package com.lifp.common.service.impl;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.io.File;
    import java.util.List;
    import java.util.Map;
    
    import org.springframework.util.Assert;
    import org.springframework.util.StringUtils;
    
    import com.lifp.common.config.DemoConfig;
    import com.lifp.common.dao.FileDao;
    import com.lifp.common.domain.FileDO;
    import com.lifp.common.service.FileService;
    
    
    @Service
    public class FileServiceImpl implements FileService {
    	@Autowired
    	private FileDao fileMapper;
    
    	@Autowired
    	private DemoConfig demoConfig;
    	@Override
    	public FileDO get(Long id){
    		return fileMapper.get(id);
    	}
    	
    	@Override
    	public List<FileDO> list(Map<String, Object> map){
    		return fileMapper.list(map);
    	}
    	
    	@Override
    	public int count(Map<String, Object> map){
    		return fileMapper.count(map);
    	}
    	
    	@Override
    	public int save(FileDO sysFile){
    		return fileMapper.save(sysFile);
    	}
    	
    	@Override
    	public int update(FileDO sysFile){
    		return fileMapper.update(sysFile);
    	}
    	
    	@Override
    	public int remove(Long id){
    		return fileMapper.remove(id);
    	}
    	
    	@Override
    	public int batchRemove(Long[] ids){
    		return fileMapper.batchRemove(ids);
    	}
    
        @Override
        public Boolean isExist(String url) {
    		Boolean isExist = false;
    		if (!StringUtils.isEmpty(url)) {
    			String filePath = url.replace("/files/", "");
    			filePath = demoConfig.getUploadPath() + filePath;
    			File file = new File(filePath);
    			if (file.exists()) {
    				isExist = true;
    			}
    		}
    		return isExist;
    	}
    	}

9. FileController

@ResponseBody
    	@PostMapping("/upload")
    	R upload(@RequestParam("file") MultipartFile file, HttpServletRequest request) {
    		String oriFileName = FileUtil.originalName(file.getOriginalFilename());
    		String size = FileUtil.getSize(file.getSize());
    		String fileName = FileUtil.renameToUUID(oriFileName);
    		FileDO sysFile = new FileDO(oriFileName, size, FileType.fileType(fileName), "/files/" + fileName, new Date());
    		try {
    			FileUtil.uploadFile(file.getBytes(), demoConfig.getUploadPath(), fileName);
    		} catch (Exception e) {
    			return R.error();
    		}
    
    		if (fileService.save(sysFile) > 0) {
    			return R.ok().put("fileName", sysFile.getUrl());
    		}
    		return R.error();
    	}
    
    	@ResponseBody
    	@GetMapping("/download")
    	String download(@RequestParam("path") String path, HttpServletResponse response) {
    		String fileName = path.substring(path.lastIndexOf("/") + 1);
    		if (fileName != null) {
    			// 设置文件路径
    			File file = new File(demoConfig.getUploadPath() + fileName);
    			// File file = new File(realPath , fileName);
    			if (file.exists()) {
    				response.setContentType("application/force-download");// 设置强制下载不打开
    				response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);// 设置文件名
    				byte[] buffer = new byte[1024];
    				FileInputStream fis = null;
    				BufferedInputStream bis = null;
    				try {
    					fis = new FileInputStream(file);
    					bis = new BufferedInputStream(fis);
    					OutputStream os = response.getOutputStream();
    					int i = bis.read(buffer);
    					while (i != -1) {
    						os.write(buffer, 0, i);
    						i = bis.read(buffer);
    					}
    					return null;
    				} catch (Exception e) {
    					e.printStackTrace();
    				} finally {
    					if (bis != null) {
    						try {
    							bis.close();
    						} catch (IOException e) {
    							e.printStackTrace();
    						}
    					}
    					if (fis != null) {
    						try {
    							fis.close();
    						} catch (IOException e) {
    							e.printStackTrace();
    						}
    					}
    				}
    			}
    		}
    		return null;
    	}
    
    	@RequestMapping("/preView")
    	@ResponseBody
    	public void preView(@RequestParam("path") String path, HttpServletResponse response) throws Exception {
    		String fileName = path.substring(path.lastIndexOf("/") + 1);
    		if (fileName != null) {
    			// 设置文件路径
    			File file = new File(demoConfig.getUploadPath() + fileName);
    			response.setContentType("application/pdf"); //预览pdf时的设置
    			FileInputStream in = new FileInputStream(file);
    			OutputStream out = response.getOutputStream();
    			byte[] b = new byte[512];
    			while ((in.read(b)) != -1) {
    				out.write(b);
    			}
    			out.flush();
    			in.close();
    			out.close();
    		}
    	}

10. File.html

<!DOCTYPE html>
    <html>
    <meta charset="utf-8">
    <head th:include="include :: header">
    </head>
    <body class="gray-bg">
    	<div class="wrapper wrapper-content animated fadeInRight">
    		<div class="col-sm-12">
    			<div class="ibox">
    				<div class="ibox-body">
    					<div id="exampleToolbar" role="group">
    
    					</div>
    					<div >
    				    
     						<button type="button" class="layui-btn" id="test1">
                                <i class="fa fa-cloud"></i>上传文件
                            </button>
    				  </div>
    					<table id="exampleTable" data-mobile-responsive="true">
    					</table>
    				</div>
    			</div>
    		</div>
    	</div>
    	<div th:include="include :: footer"></div>
    	<script src="/js/layui.js"></script>
    	<script type="text/javascript" src="/js/appjs/common/file/file.js"></script>
    	
    </body>
    </html>

10. File.js