上传图片：
MyMvcConfig重写addResourceHandlers方法，判断jar包是windows还是linux系统下运行。
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
String os = System.getProperty("os.name");
System.out.println(os);
if(os.toLowerCase().startsWith("win")){
//--------------------------------------windows下保存路径-------------------------------------------------------------
//项目图片访问路径
registry.addResourceHandler("/pictureUpload/project/**").addResourceLocations("file:D:/pictureUpload/project/");
}else{
//--------------------------------------linux下保存路径---------------------------------------------------------------------------------
//项目图片访问路径
registry.addResourceHandler("/pictureUpload/project/**").addResourceLocations("file:/root/pictureUpload/project/");
}
}
Controller上传图片功能
/**
* 上传图片
*
* @param file
* @return
*/
@Transactional
@ResponseBody
@PostMapping("/backgallery/PictureUpload")
public String Backgallery(@RequestParam(value = "projectImg", required = true) MultipartFile file,
HttpServletRequest request) {
//将图片上传到服务器
if (file.isEmpty()) {
return "项目图片不能为空";
}
//原始文件名
String originalFilename = file.getOriginalFilename();
//文件后缀
String suffix = originalFilename.substring(originalFilename.lastIndexOf(".") + 1);
//图片名称为uuid+图片后缀防止冲突
String fileName = UUID.randomUUID().toString() + "." + suffix;
String os = System.getProperty("os.name");
//文件保存路径
String filePath = "";
if (os.toLowerCase().startsWith("win")) {
//windows下的路径
filePath = "d:/pictureUpload/project/";
} else {
//linux下的路径
filePath = "/root/pictureUpload/project/";
}
try {
//写入图片
Boolean writePictureflag = FileUtils.uploadFile(file.getBytes(), filePath, fileName);
if (writePictureflag == false) {
//上传图片失败
return "上传项目图片失败";
} else {
//上传成功后，将可以访问的完整路径返回
String fullImgpath = "/pictureUpload/project/" + fileName;
String jsonData = "{'data':{'src':'" + fullImgpath + "'}}";
//获取当前登录对象
User loginUser = (User) request.getSession().getAttribute("loginUser");
//将图片信息传入数据库
Gallery gallery = new Gallery();
gallery.setGmtcreate(System.currentTimeMillis());
gallery.setFullimgpath(fullImgpath);
gallery.setUsername(loginUser.getName());
galleryService.addGallery(gallery);
return jsonData;
}
} catch (Exception e) {
e.printStackTrace();
//上传图片失败
return "上传项目图片失败";
}
}
工具类：
/**
* @description：文件操作相关工具类
* @Author MRyan
* @Date 2020/3/28 8:43
* @Version 1.0
*/
public class FileUtils {
public static Boolean uploadFile(byte[] file, String filePath, String fileName) throws Exception {
FileOutputStream out = null;
try {
File targetFile = new File(filePath);
//如果目录不存在，创建目录
if(!targetFile.exists()){
targetFile.mkdirs();
}
out = new FileOutputStream(filePath+fileName);
out.write(file);
out.flush();
//写入成功
return true;
} catch (IOException e) {
e.printStackTrace();
//写入失败
return false;
} finally {
out.close();
}
}
}
接下来是html整合layUi
<div class="layui-form-item magt3">
<div class="layui-upload">
<button type="button" class="layui-btn layui-btn-normal" id="test1">选择图片</button>
<button type="button" style="margin-left: 20px" class="layui-btn layui-btn-danger" id="btn">上传图片
</button>
<div class="layui-upload-list">
<img class="layui-upload-img" id="demo1">
<p id="demoText"></p>
</div>
</div>
</div>
js：
<script>
//一般直接写在一个js文件中
layui.use(['layer', 'upload'], function () {
var form = layui.form
, upload = layui.upload;
//图片上传
var uploadInst = upload.render({
elem: '#test1'
, url: '/backgallery/PictureUpload'
, method: 'post'
//多图上传,multiple: true
, auto: false
, bindAction: '#btn'
, accept: 'images'
, acceptMime: 'image/*'
, field: 'projectImg'
, choose: function (obj) {
alert("选择成功，请点击上传");
}
, done: function (res) {
//上传成功,获得图片地址
$('#demo1').attr('src', res.data);
console.log(res.data);
alert("上传成功");
}
, error: function (res) {
$('#demo1').attr('src', res.data);
console.log(res.data);
alert("上传成功");
window.location.reload();
}
});
});
</script>
Bug:
上传图片失败由于图片大小过大
解决方案：
在application-properties中配置
spring.servlet.multipart.max-file-size=50000000000
spring.servlet.multipart.max-request-size=200000000000
删除图片：
同理删除图片只需要定位到图片在服务器下的位置，然后File.delete()即可
Controller代码
/**
* 删除图片
*
* @param model
* @return
*/
@GetMapping("/backgallery/Delgallery/{id}")
public String DelBackgallery(@PathVariable(“id”) int id) {
String os = System.getProperty(“os.name”);
//根据id查询服务器图片地址 删除图片并且清除数据库记录
Gallery gallery = galleryService.qeryGalleryById(id);
String fullImgpath = null;
String filename = gallery.getFullimgpath().substring(gallery.getFullimgpath().lastIndexOf(’/’) + 1);
if (os.toLowerCase().startsWith(“win”)) {
//windows下的路径
fullImgpath = “d:/pictureUpload/project/”+filename;
} else {
//linux下的路径
fullImgpath = “/root/pictureUpload/project/”+filename;
}
if (gallery != null) {
boolean istrue = FileUtils.delFile(fullImgpath);
if (istrue) {
//删除数据库中图片信息
galleryService.delGallery(id);
}
}
return "redirect:/backgallery";
}
FileUtils工具类
/**
* 删除图片
*
* @param fullImgpath
* @return
*/
public static boolean delFile(String fullImgpath) {
//fullImgpath 是"/pictureUpload/project/" + fileName;
File file = new File(fullImgpath);
//文件是否存在
if (file.exists()) {
if (file.delete()) {
return true;
} else {
return false;
}
} else {
return false;
}
}