java实现图片上传至本地实例详解
在工作中要求将图片上传至本地,如下代码将介绍如何将图片上传至本地
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准备工作:
环境:eclipse4.5-x64,jdk1.7-x64,maven3
tomcat服务器配置图片上传映射:
上传至本地服务器配置文件:image.properties
#\u672c\u5730\u670d\u52a1\u5668\u56fe\u7247\u4fdd\u5b58\u8def\u5f84 IMAGEPATH=/mall/upload/image/ #\u56fe\u7247\u540e\u7f00\u540d FILE_EXTEND_NAME=gif,jpg,jpeg,png,bmp #\u672c\u5730\u670d\u52a1\u5668\u89c6\u9891\u5b58\u50a8\u5730\u5740 MEDIAPATH=/mall/upload/media/ #\u89c6\u9891\u540e\u7f00\u540d MEDIA_EXTEND_NAME=mp4
controlle:UploadUtil.java
/** * 文件上传工具类 * @author sang */ @Controller public class UploadUtil { /** 记录日志对象 */ private static final MyLogger LOGGER = new MyLogger(UploadUtil.class); /**图片格式错误信息*/ private static final String LOGGERINFO1 = "的图片不符合限制"; /** * 备注: * uploadImgLocal,uploadImgOSS,ossConfMapper均是静态成员变量 * 则添加注解注意只能用@Autowired且get,set方法不能有static否则报错 * */ /**文件上传:本地,注意*/ private static UploadImgLocal uploadImgLocal; /**文件上传:OSS对象 */ private static UploadImgOSS uploadImgOSS; /**OSS配置查询 */ private static OSSConfMapper ossConfMapper; public UploadImgLocal getUploadImgLocal() { return uploadImgLocal; } @Autowired public void setUploadImgLocal(UploadImgLocal uploadImgLocal) { UploadUtil.uploadImgLocal = uploadImgLocal; } public UploadImgOSS getUploadImgOSS() { return uploadImgOSS; } @Autowired public void setUploadImgOSS(UploadImgOSS uploadImgOSS) { UploadUtil.uploadImgOSS = uploadImgOSS; } public OSSConfMapper getOssConfMapper() { return ossConfMapper; } @Autowired public void setOssConfMapper(OSSConfMapper ossConfMapper) { UploadUtil.ossConfMapper = ossConfMapper; } /** * 上传文件:去除85这个宽度 * @param muFile 上传文件 * @param req * @return Map 返回中 key值{0,1,2,oldimg} 0小图 1中图 2大图 oldimg原图 */ public static synchronized MapuploadFile(MultipartFile muFile,HttpServletRequest req) { Map map = null; try { //查询oss启用状态的配置信息 OSSConf ossConf=ossConfMapper.findByOssStatus(); if(muFile != null && muFile.getSize()>0 && ossConf!=null) { //检查上传的图片的大小和扩展名 if (!UploadImgCommon.checkFileForSpringUpload(muFile)) { throw new RuntimeException("上传" + muFile.getOriginalFilename() + LOGGERINFO1); } //oss类型0本地1阿里云2京东云 String ossType=ossConf.getOssType(); if("0".equals(ossType)){ //上传本地 map = uploadImgLocal.uploadForABCSize(muFile); }else if("1".equals(ossType) || "2".equals(ossType)){ //上传oss map=uploadImgOSS.uploadForABCSize(muFile,ossConf); } } } catch (Exception e) { e.printStackTrace(); LOGGER.error("上传文件失败"+e.getMessage(),e); } return map; } }
类:UploadImgLocal.java
/** * 上传文件:本地 * @author somnus * */ @Component("uploadImgLocal") public class UploadImgLocal { /** 记录日志对象 */ private static final MyLogger LOGGER = new MyLogger(UploadImgLocal.class); /**获得当前项目访问的地址 */ private static String url; @Resource(name = "SysHelperMapper") private SysHelperMapper sysHelperMapper; /** * 上传文件:去除85这个宽度 * 存储原图地址如:http://127.0.0.1:8080:/mall/upload/image/20170804/1501811601145.jpg * @param muFile * @return Map 返回中 key值{0,1,2,oldimg} 0小图 1中图 2大图 oldimg原图 */ public MapuploadForABCSize(MultipartFile muFile) { //封装结果集 Map imgMap = new HashMap (); //服务器本地保存图片路径 HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest(); //获得当前项目访问的地址:http://127.0.0.1:8080 url=UploadImgCommon.getHttpAndPort(request); //获取上传文件的保存路径:文件拼接地址:服务器本地保存路径+文件名+后缀 String fileNamess = UploadImgCommon.getPicNamePathSuffix(); try { File file = new File(fileNamess); //转存文件到指定的路径 muFile.transferTo(file); //获取原图地址 LOGGER.info(UploadImgCommon.LOGGERINFO1 + (url+fileNamess)); //存储原图地址如:/mall/upload/image/20170804/1501811601145.jpg imgMap.put(UploadImgCommon.OLDIMG, (url+fileNamess)); //图片处理:获取宽度集合,去除85这个宽度[352, 56, 160] int[] widths = UploadImgCommon.getImgSetOut85(sysHelperMapper.selectImageSet()); //给宽度集合升序排序 UploadImgCommon.sortWidth(widths);//[56,160,352] //缩放文件 File zoomFile=null; for(int i = 0; i < widths.length; i++){ //20171226新优化:将指定尺寸图片存储至本地 //缩放文件名 String zoomFileName=UploadImgCommon.picPath + UploadImgCommon.prefix + UploadImgCommon.SYMBOLS + widths[i] + UploadImgCommon.suffix; //创建缩放文件 zoomFile=new File(zoomFileName); //转存文件到指定的路径 muFile.transferTo(zoomFile); //获取指定尺寸图片地址:大图352中160小56 LOGGER.info(widths[i]+UploadImgCommon.LOGGERINFO2+(url + UploadImgCommon.picPath + UploadImgCommon.prefix + UploadImgCommon.SYMBOLS + widths[i] + UploadImgCommon.suffix)); imgMap.put(i + "", (url + UploadImgCommon.picPath + UploadImgCommon.prefix + UploadImgCommon.SYMBOLS + widths[i] + UploadImgCommon.suffix)); } } catch (IllegalStateException e) { e.printStackTrace(); LOGGER.error(UploadImgCommon.LOGGERINFO3, e); } catch (IOException e) { e.printStackTrace(); LOGGER.error(UploadImgCommon.LOGGERINFO3, e); } catch (Exception e) { e.printStackTrace(); LOGGER.error(UploadImgCommon.LOGGERINFO3, e); } return imgMap; } }
公共方法:UploadImgCommon.java
package com.qianjiang.util.uploadutil; import java.io.File; import java.io.InputStream; import java.util.Arrays; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Properties; import javax.servlet.http.HttpServletRequest; import org.apache.commons.fileupload.FileItem; import org.springframework.web.multipart.MultipartFile; import com.qianjiang.manager.bean.ImageSet; import com.qianjiang.util.MyLogger; import com.qianjiang.util.UtilDate; /** * 文件上传公共方法 * @author somnus */ public class UploadImgCommon { /** 记录日志对象 */ private static final MyLogger LOGGER = new MyLogger(UploadImgCommon.class); /**定义图片*/ protected static final String IMAGE = "image"; /**定义视频*/ protected static final String MEDIA="media"; /**定义图片上传最大限制10MB*/ private static long maxSize = 10 * 1024 * 1024; /**定义视频上传最大限制500MB */ private static long mediaMaxSize= 500 * 1024 * 1024; /**定义允许上传文件扩展名 */ private static HashMapextMap = new HashMap (); /**文件保存路径 */ protected static String picPath; /** 要保存的文件名 */ protected static String prefix; /**文件后缀 */ protected static String suffix; /**定位宽度集合循环次数*/ protected static final int THREE = 3; /**拼接图片缩放特殊符号*/ protected static final String SYMBOLS="@"; /**图片56缩放*/ protected static final int SMALL = 56; /**设置imgMap中返回小图key值*/ protected static final int SMALLIMG=0; /**原图*/ protected static final String OLDIMG = "oldimg"; protected static final String LOGGERINFO1 = "原图地址:"; protected static final String LOGGERINFO2 = "尺寸的图片地址:"; protected static final String LOGGERINFO3 = "图片上传,返回key值列表错误"; //本地上传图片properties属性值 protected static final String IMAGEPATH = "IMAGEPATH"; //本地上传视频properties属性值 protected static final String MEDIAPATH = "MEDIAPATH"; /**初始化*/ static { //允许图片扩展名 extMap.put(IMAGE, "gif,jpg,jpeg,png,bmp"); //允许视频扩展名 extMap.put(MEDIA, "mp4"); } /** * 获取上传文件的保存路径 * 文件拼接地址:服务器本地保存路径+文件名+后缀 * @return 文件名(全路径) */ public static String getPicNamePathSuffix() { String fileName=""; try { //根据系统当前时间生成上传后保存的文件名 long now = System.currentTimeMillis(); //文件名系统当前时间如1501848484869 prefix = String.valueOf(now); //文件路径如:/mall/upload/image/20170804/ picPath = getHostAndPort().getProperty(IMAGEPATH) + UtilDate.todayFormatString(new Date()) + "/"; //根据真实路径创建目录文件 File picSaveFile = new File(picPath); if(!picSaveFile.exists()){ picSaveFile.mkdirs(); } //文件的后缀 suffix = ".jpg"; fileName=picPath + prefix + suffix; LOGGER.info("创建文件成功,文件名:"+fileName); } catch (Exception e) { e.printStackTrace(); LOGGER.error("创建本地文件失败"+e.getMessage(),e); } return fileName; } /** * 上传视频存储本地服务器 * 获取上传文件的保存名称、服务器本地保存路径、后缀,拼接成文件地址 * @return */ public static String getVideoNamePathSuffix() { String fileName=""; try { //根据系统当前时间生成上传后保存的文件名 long now = System.currentTimeMillis(); //文件名系统当前时间如1501848484869 prefix = String.valueOf(now); //文件路径如:/mall/upload/media/20170804/ picPath =getHostAndPort().getProperty(MEDIAPATH) + UtilDate.todayFormatString(new Date()) + "/"; //根据真实路径创建目录文件 File picSaveFile = new File(picPath); if(!picSaveFile.exists()){ picSaveFile.mkdirs(); } //文件的后缀(默认为MP4格式) UploadImgCommon.suffix = ".mp4"; fileName=picPath + prefix + suffix; LOGGER.info("创建视频文件成功,文件名:"+fileName); } catch (Exception e) { e.printStackTrace(); LOGGER.error("创建上传视频本地服务器地址失败:"+e.getLocalizedMessage(), e); } return fileName; } /** * 获取宽度集合 * @return */ public static int[] getImgSet(List imgSet) { int[] widths = new int[imgSet.size()]; for (int i = 0; i < imgSet.size(); i++) { widths[i] = Integer.parseInt(imgSet.get(i).getRuleWidth()); } return widths; } /** * 获取宽度集合,去除85这个宽度 * @param imgSet * @return */ public static int[] getImgSetOut85(List imgSet) { int[] widths = new int[THREE]; for (int i = 0; i < imgSet.size(); i++) { if ("85".equals(imgSet.get(i).getRuleWidth())) { if (i < 3) { i--; } continue; } widths[i] = Integer.parseInt(imgSet.get(i).getRuleWidth()); } return widths; } /** * 给宽度集合升序排序 * @param widths */ public static void sortWidth(int[] widths) { for (int i = 0; i < widths.length; i++) { for (int j = i + 1; j < widths.length; j++) { int temp; if (widths[i] > widths[j]) { temp = widths[i]; widths[i] = widths[j]; widths[j] = temp; } } } } /** * 获得当前项目访问的地址 * 比如http://127.0.0.1:8080 * @param request * @return 返回当前项目访问的地址 */ public static String getHttpAndPort(HttpServletRequest request) { return request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort(); } /** * 读取配置文件信息 * @return */ public static Properties getHostAndPort() { Properties p = new Properties(); try{ InputStream inputStream = UploadImgCommon.class.getClassLoader().getResourceAsStream("config/image.properties"); p.load(inputStream); }catch(Exception e){ e.printStackTrace(); LOGGER.error("读取Properties属性文件错误"+e.getMessage(),e); } return p; } /** * SpringMVC上传:验证上传图片的大小和扩展名 * @param muFile 上传文件 * @return 验证通过返回true,否则返回false */ public static boolean checkFileForSpringUpload(MultipartFile muFile) { boolean bool = true; // 检查文件大小 if (muFile.getSize() > maxSize) { LOGGER.error("=============>上传" + muFile.getOriginalFilename() + "文件大小超过限制"); bool = false; return bool; } String fileName = muFile.getOriginalFilename(); //检查扩展名 String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase(); if (!Arrays. asList(extMap.get(IMAGE).split(",")).contains(fileExt)) { LOGGER.error("上传文件" + muFile.getOriginalFilename() + "扩展名是不允许的扩展名。\n只允许" + extMap.get(IMAGE) + "格式。"); bool = false; return bool; } return bool; } /** * js引入Kindeditor插件实现文件上传 * 验证上传文件大小和扩展名 * @param file 上传文件 * @return 验证通过返回true,否则返回false */ public static boolean checkFileAndMedia(FileItem file,String dirName) { boolean bool = true; //文件大小 long fileSize = file.getSize(); //文件名 String fileName = file.getName(); //检查文件大小 if(fileSize > maxSize && fileSize > mediaMaxSize){ LOGGER.error("=============>上传" + file.getFieldName() + "文件大小超过限制"); bool = false; return bool; } //检查扩展名 String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase(); if(!Arrays. asList(extMap.get(dirName).split(",")).contains(fileExt)){ LOGGER.error("上传文件" + file.getFieldName() + "扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"); bool = false; return bool; } return bool; } }
上传成功后控制台打印信息:
上传成功后前台展示效果:
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