用户头像上传
思路：
将文件保存到指定路径
为原文件名加上时间戳尽量避免文件名冲突
问题：
上传到应用目录，重新部署项目需要将上传的文件目录拷贝出来。
文件上传Controller
@RequestMapping("/uploadAccountImage")
public Result uploadAccountImage(@RequestParam("userImage")MultipartFile userImage, HttpServletRequest request){
try{
log.info("[账户管理][账户头像上传]");
String uploadPath = "upload/account/image";
Map<String, String> uploadResult = fileService.upload(
FileUtil.appendBeforeDot(userImage.getOriginalFilename(),"_", GetTimeUtil.getNowTimeStamp()),
userImage,
FileUtil.appendTimePath(uploadPath, FileUtil.TimeUnit.YEAR),
request);
log.info("[账户管理][账户头像上传]上传结果：uploadResult={}", JSONObject.toJSONString(uploadResult));
String flag = uploadResult.get("flag");
if("success".equals(flag)){
return ResultFactory.buildSuccessResult(uploadResult);
}else{
return ResultFactory.buildFailResult(uploadResult.get("message"));
}
} catch (CardException e){
return ResultFactory.buidResult(e.getCode(), e.getCardMessage(), null);
} catch (Exception e){
e.printStackTrace();
log.error("[账户管理][账户头像上传]发生异常");
return ResultFactory.buildFailResult("发生异常");
}
}
{
"code": 200,
"message": "成功",
"data": {
"flag": "success",
"webUrl": "upload/account/image/201911/中国图画_20191107163422723.png",
"message": "文件上传成功"
}
}
文件工具类
package com.yuantiao.smartcardms.util;
import org.apache.commons.lang3.RandomStringUtils;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* @date: 2019/11/7 14:51
*/
public class FileUtil {
/**
* 为文件名称添加指定字符串。
* @param srcFileName
* @param add
* @return
*/
public static String appendBeforeDot(String srcFileName, String... add){
StringBuilder temp = new StringBuilder();
for (int i = 0; i < add.length; i++) {
temp.append(add[i]);
}
String tempAddStr = temp.toString();
StringBuilder sb = new StringBuilder(srcFileName);
int i = sb.lastIndexOf(".");
if(i == -1){
sb.append(tempAddStr);
}else{
sb.insert(i, tempAddStr);
}
return sb.toString();
}
/**
* web路径追加路径
* @param webPath
* @param addPath
* @return
*/
public static String appendWebPath(String webPath, String... addPath){
StringBuilder result = new StringBuilder(trimSlash(webPath));
for (int i = 0; i < addPath.length; i++) {
result.append("/").append(trimSlash(addPath[i]));
}
return result.toString();
}
public static String trimSlash(String str){
if(str.startsWith("/"))
str = str.substring(1);
if(str.endsWith("/"))
str = str.substring(0, str.length() - 1);
return str;
}
/**
* web路径追加时间
* @param webPath
* @param timeUnit
* @return
*/
public static String appendTimePath(String webPath, TimeUnit timeUnit){
if(!webPath.endsWith("/"))
webPath = webPath + "/";
SimpleDateFormat format = new SimpleDateFormat(timeUnit.getFormat());
String timePath = format.format(new Date());
String result = webPath + timePath;
return result;
}
public enum TimeUnit{
YEAR("yyyy"),
MONTH("yyyyMM"),
DAY("yyyyMMdd");
private String format;
TimeUnit(String format){
this.format = format;
}
public String getFormat(){
return format;
}
}
public static void main(String[] args) {
String srcName = "图片.png";
String result = appendBeforeDot(srcName, "_" + GetTimeUtil.getNowTimeStamp(), "_", RandomStringUtils.randomNumeric(4));
System.out.println(result);
String pathYear = "user";
System.out.println(appendTimePath(pathYear, TimeUnit.YEAR));
System.out.println(appendTimePath(pathYear, TimeUnit.MONTH));
System.out.println(appendTimePath(pathYear, TimeUnit.DAY));
String path = "/baidu/";
System.out.println(trimSlash(path));
System.out.println(appendWebPath(path, "/1ewe/", "chongyang/"));
//https://img2018.cnblogs.com/blog/1478368/201911/1478368-20191103192011017-752436299.png
}
}
日期工具类
package com.yuantiao.smartcardms.util;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
/**
* 时间工具类
*/
public class GetTimeUtil {
//时间戳
public static final String timeStamp="yyyyMMddHHmmssSSS";
public static final String time_Stamp="yyyy-MM-dd HH:mm:ss.SSS";
public static final String date_time="yyyy-MM-dd HH:mm:ss";
/**
* 获取当前时间戳--毫秒
* @return
*/
public static String getNowTimeStamp() {
SimpleDateFormat sdf = new SimpleDateFormat(timeStamp);
return sdf.format(new Date());
}
/**
* DateFormatter Date to String.
*
* @param format
* 日期定义格式
* @param date
* Date类型日期
* @return String类型日期
*/
public static String format(String format, Date date) {
try {
if (date == null || "".equals(date)) {
return null;
}
SimpleDateFormat sdf = new SimpleDateFormat(format);
return sdf.format(date);
}catch(Exception e){
e.printStackTrace();
}
return null;
}
/**
* 获取两个时间中的每一天
* @param bigtimeStr 开始时间 yyyy-MM-dd
* @param endTimeStr 结束时间 yyyy-MM-dd
* @return
* @throws ParseException
*/
public static List<String> getDays(String bigtimeStr, String endTimeStr) throws ParseException {
Date bigtime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(bigtimeStr + " 00:00:00");
Date endtime = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(endTimeStr + " 00:00:00");
//定义一个接受时间的集合
List<Date> lDate = new ArrayList<>();
lDate.add(bigtime);
Calendar calBegin = Calendar.getInstance();
// 使用给定的 Date 设置此 Calendar 的时间
calBegin.setTime(bigtime);
Calendar calEnd = Calendar.getInstance();
// 使用给定的 Date 设置此 Calendar 的时间
calEnd.setTime(endtime);
// 测试此日期是否在指定日期之后
while (endtime.after(calBegin.getTime())) {
// 根据日历的规则，为给定的日历字段添加或减去指定的时间量
calBegin.add(Calendar.DAY_OF_MONTH, 1);
lDate.add(calBegin.getTime());
}
List<String> datas = new LinkedList<>();
for (Date date : lDate) {
datas.add(new SimpleDateFormat("yyyy-MM-dd").format(date));
}
return datas;
}
public static void main(String[] args) {
String nowTimeStamp = GetTimeUtil.getNowTimeStamp();
System.out.println(nowTimeStamp);
}
}
文件上传服务类
package com.yuantiao.smartcardms.service;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;
import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
* @date: 2019/11/7 14:55
*/
@Service
public class FileService {
public Map<String, String> upload(MultipartFile file, String webPath, HttpServletRequest request){
return upload(file.getOriginalFilename(), file, webPath, request);
}
public Map<String, String> upload(String fileName, MultipartFile file,String webPath, HttpServletRequest request){
//处理后缀
if(!webPath.endsWith("/"))
webPath += "/";
String webUrl = webPath + fileName;
HashMap<String, String> result = new HashMap<>();
//获取物理路径
String fileRealPath = request.getServletContext().getRealPath(webUrl);
File destFile = new File(fileRealPath);
//目录不存在
if(!destFile.getParentFile().exists()){
destFile.getParentFile().mkdirs();
}
//目录存在是文件
if(destFile.getParentFile().isFile()){
result.put("flag", "fail");
result.put("message","父级路径是文件而不是目录");
return result;
}
//文件已经存在
if(destFile.exists()){
result.put("flag", "fail");
result.put("message","文件已经存在");
return result;
}
try {
file.transferTo(destFile);
result.put("flag", "success");
result.put("message","文件上传成功");
result.put("webUrl",webUrl);
} catch (IOException e) {
e.printStackTrace();
result.put("flag", "fail");
result.put("message","文件写入本地发生异常");
}
return result;
}
}
服务器地址
server:
servlet:
context-path: /mozq
String contextPath = request.getContextPath();
// /mozq
String realPath1 = request.getServletContext().getRealPath(null);
// null
String realPath2 = request.getServletContext().getRealPath("");
//C:\Users\1\AppData\Local\Temp\tomcat-docbase.1683852606771175828.80\
String realPath3 = request.getServletContext().getRealPath("/upload");
// C:\Users\1\AppData\Local\Temp\tomcat-docbase.3156895875552019719.80\upload
String realPath4 = request.getServletContext().getRealPath("download");
// C:\Users\1\AppData\Local\Temp\tomcat-docbase.3156895875552019719.80\download
文件系统路径分隔符
System.out.println(File.separator);
bugs
Caused by: java.io.FileNotFoundException: C:\Users\1\AppData\Local\Temp\tomcat-docbase.1363371158874723329.80\upload\user\Capture001changzhou.png (系统找不到指定的路径。)
Can't load log handler "java.util.logging.FileHandler"
java.nio.file.NoSuchFileException: log\spring.log.0.lck
java.nio.file.NoSuchFileException: log\spring.log.0.lck
原因：
spring日志打印不出来，然后端口号被占用，直接启动失败没有任何提示信息。
Caused by: java.lang.IllegalArgumentException: ContextPath must start with '/' and not end with '/'
正确代码：
server:
servlet:
context-path: /mozq
来源：https://www.cnblogs.com/mozq/p/11813386.html