js单文件上传,后台java接收

 HTML代码(目前不需要form标签的方式):

<input type="file" name="file1_1" id="file1_1">
<input type="button" value="上传" onclick="uploadFile('file1_1');" />

JavaScript代码:

function uploadFile(fileType){	//文件上传
	var fileObj = document.getElementById(fileType).files[0]; // js 获取文件对象
	var formFile = new FormData();
	formFile.append("file", fileObj); //加入文件对象
	var data = formFile;
			
	$.ajax({
		type : "post",
		url : "${ctx}/record/file/upload/" + fileType,
		data : data,
		cache : false,
		async : true,
		processData : false,	//不处理发送的数据
		contentType : false,	//不设置请求头
		success : function(){
			console.log("success");
		},
		error : function(){
			console.log("err");
		}
	});
}

Java后台代码:

@RequestMapping(value = "upload/{whatFile}")
public String upload(@PathVariable("whatFile") String whatFile, Model model, 
		@RequestParam("file") MultipartFile file,
		HttpServletRequest request, HttpServletResponse response) throws IOException {
		
	//文件上传...

	return "";
}

 

转载于:https://my.oschina.net/patch/blog/1631162

简单的利用javajs实现文件上传 package com.fendou.myString; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.util.Iterator; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class FileUpload extends HttpServlet { protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { boolean a=ServletFileUpload.isMultipartContent(request); if(a){ FileItemFactory factory=new DiskFileItemFactory(); ServletFileUpload upload=new ServletFileUpload (factory); Iterator items; try{ items=upload.parseRequest (request).iterator(); while(items.hasNext()){ FileItem item=(FileItem) items.next(); if(!item.isFormField()){ String name=item.getName (); String fileName=name.substring(name.lastIndexOf("\\")+1, name.length()); String path=request.getRealPath("file")+File.pathSeparatorChar+fileName; File uploadFile=new File (path); request.getSession ().setAttribute("file", uploadFile); item.write(uploadFile); response.setContentType ("text/html"); response.setCharacterEncoding("utf-8"); PrintWriter out=response.getWriter(); // out.print("<font size='2'> 上传文件为:"+name+"<br>"); // out.print("保存在服务器上 的地址为:"+path+"</font>"); } } }catch(Exception e){ e.printStackTrace(); } } response.sendRedirect("smartupload.jsp"); } }
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