说明jquery ajax上传图片

springmvc接收并保存到本地，并拼装图片url，返回给前端

前端接收到url后，回显图片

注意：

jquery版本不能太低，最好1.10以上

html

function update(){

var formData = new FormData();

formData.append("image",$("#image")[0].files[0]);

$.ajax({

url:'goods/upload', /*接口域名地址*/

type:'post',

data: formData,

contentType: false,

processData: false,

success:function(res){

console.log(res.data);

if(res.code==0){

$("#img").attr('src',res.data.imageURL);

imageURL=res.data.dbURL;

}else{

alert(res.msg);

}

},

error:function (XMLHttpRequest, textStatus, errorThrown) {

alert(XMLHttpRequest);

alert(textStatus);

alert(errorThrown);

}

})

}

java@RestController

@RequestMapping("/mgr/goods")

public class MgrGoodsCtrl {

@PostMapping("/upload")

public JsonResult upload(MultipartFile image,HttpServletRequest req) {

JsonDataResult> jr=new JsonDataResult();

String oFilename=image.getOriginalFilename();

String suffix=oFilename.substring(oFilename.lastIndexOf("."));

String newFilename=UUIDTools.randomUUID()+suffix;

//前台页面回显图片的url

String imageURL=req.getContextPath()+"/"+Key.UPLOAD_FOLDER+"/"+newFilename;

//保存到数据库中的url，为了保证通用，根路径为Key.UPLOAD_FOLDER

String dbURL=Key.UPLOAD_FOLDER+"/"+newFilename;

String contexPath= req.getSession().getServletContext().getRealPath("/");

File file=new File(contexPath,"upload");

if(!file.exists()) {

file.mkdirs();

}

File filePath=new File(file,newFilename);

try {

image.transferTo(filePath);

jr.setCode(0);

Map map=new HashMap();

map.put("imageURL", imageURL);

map.put("dbURL", dbURL);

jr.setData(map);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return jr;

}

}