核心代码
由于HttpServletRequest不能直接取出文件数据,所以将其强制转换为MultipartHttpServletRequest
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
List<MultipartFile> files = multipartRequest.getFiles("files");
POST
/*提交表单*/
function myupload() {
$.ajax({
url:"/exUploadController.do?uploadTest",
type : "POST",
async: false,
cache: false, //此处设置false
contentType: false,//必须设置false ,formupload1表单中必须设置enctype="multipart/form-data"
processData: false, //必须设置fals
data :new FormData(document.getElementById("myForm")),
success:function (data) {
alert(data);
},
error:function (XMLHttpRequest, textStatus, errorThrown) {
console.log(XMLHttpRequest);
console.log(textStatus);
console.log(errorThrown);
}
})
}
Servlet
HttpServletRequest request;
//获取上传图片
MultipartHttpServletRequest mureq = (MultipartHttpServletRequest) request;
Map<String, MultipartFile> files = mureq.getFileMap();
MultipartFile file =null;
if (files != null &&files.size()> 0) {
Map.Entry<String, MultipartFile> f = files.entrySet().iterator().next();
file = f.getValue();
}
//获取项目部署的路径
String rootPath = request.getSession().getServletContext().getRealPath("/");
//获取上传图片的名称
String fileName = file.getOriginalFilename();
//获取上传图片的大小
float size = file.getSize()
//在path路径下创建一个文件
File newFile = new File(path);
//判断文件是否存在
if(!newFile.exists()) {
newFile.mkdirs();//不存在的话,就开辟一个空间
}
//将上传的文件存储
file.transferTo(newFile);
获取HttpServletRequest中的文件对象并储存