上传到服务器，这里讲tomcat
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@PostMapping("/saveImg.do")
@ResponseBody
public String saveImg(@RequestParam(value = "file", required = false) MultipartFile[] files,
HttpServletRequest request) {
//path 图片的保存路径 就是存到项目的根目录
String path = (new File(request.getServletContext().getRealPath("/"))).getParent() + "/upload" + request.getContextPath() + "/image";
// 调用上传方法
List<String> list = this.getUploadFile(files, path);
// 将文件的保存路径存入数据库
StringBuilder sb = new StringBuilder();
if (!list.isEmpty()) {
//存数据库
for (String s : list) {
sb.append("upload" + request.getContextPath() + "/image/" + String.valueOf(s) + ",");
}
}
return sb.toString();
}
着重讲解下文件的保存路径
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接下来是文件上传的方法
public List<String> getUploadFile(MultipartFile[] file, String savepath) {
//获取多个文件的名称集合
List<String> files = new LinkedList<String>();
try {
for (MultipartFile multipartFile : file) {
//文件原始命名
String originName= multipartFile.getOriginalFilename();
System.out.println("originName" + originName);
// 文件重新命名
String fileName = System.currentTimeMillis() + originName;
File targetFile = new File(savepath, fileName);
if (!targetFile.exists()) {
targetFile.mkdirs();
}
// 保存
try {
multipartFile.transferTo(targetFile);
files.add(fileName);
} catch (Exception e) {
e.printStackTrace();
}
}
} catch (Exception e) {
}
return files;
}
将web项目部署在tomcat，进行测试
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可以看到已经存进数据库，现在我们需要拿出来，需要做到的效果是，可以直接访问
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取数据库字段拼url
@Override
public ServerResponse getImg(Integer fid, HttpServletResponse response) {
//url 是tomcat项目路径
String url = MyUtil.getTomcatUrl();
//通过查询 查存图片的字段
String img = workOrderMapper.selectImg(fid);
List<String> imgList = new ArrayList<>();
//根据逗号分割
if (!Transform.TestIsEmpty(img)) {
String[] imgs = img.split(",");
for (int i = 0; i < imgs.length; i++) {
imgList.add(url + imgs[i]);
}
}
return ServerResponse.createBySuccess(imgList);
}
调用了工具类 拿到tomcat的url
package com.asset.util;
import com.asset.service.finance.FinPayService;
import com.asset.vo.request.FinPayManageReqVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.mvc.condition.RequestConditionHolder;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
public class MyUtil {
//获取后台项目路径
public static String getUrl(){
HttpServletRequest request=((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
return basePath;
}
//获取前端路径
public static String getFrontUrl(){
HttpServletRequest request=((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
String path = request.getContextPath();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort();
return basePath;
}
//获取tomcat项目路径
public static String getTomcatUrl() {
HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + "/";
return basePath;
}
}
正常来讲文件上传应该是放在项目文件夹下，不过我是war打包上传的，每次重新上传war，会把原来的项目文件夹删除了再重新生成。
解决方式：
- 将上传文件或图片存放在本地磁盘
- 在本地磁盘创建一个文件管理的文件夹
- 配置虚拟目录
详见
https://blog.csdn.net/qq_43072399/article/details/102397314
决定测试一下看效果
- 本地新建一个文件夹存放上传文件
- tomcat 配置虚拟路径
配置虚拟路径后需要重启服务器
tomcat --->conf---server.xml
<Context path="/imges" docBase="D:\xuni" debug="0" reloadable="true"/>
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