java实现图片上传至本地实例详解

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

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 Map uploadFile(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 Map uploadForABCSize(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 HashMap extMap = 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 suffihttp://x;

/**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 mMzCG= "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[] gmMzCGetImgSet(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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