(参考文献：https://www.jb51.net/shouce/jquery/jquery_api/Plugins/Form/ajaxSubmit.html)
一：web (add.jsp)
复制代码 代码如下:
<%@page import="com.fingerknow.project.vo.UserInformation"%>
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
response.setCharacterEncoding("utf-8");//这个是设置编码方式
response.setContentType("text/html");//这个是设置网页类型，为文本代码
UserInformation user=null;
String username="";
Integer userId=null;
if(request.getSession().getAttribute("userinfo")!=null){
user=(UserInformation)request.getSession().getAttribute("userinfo");
username=user.getUsername();
userId=user.getUserId();
}else{
username="请登录";
}
%>
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二：service(FileUploadController.java ----springMVC 之controller层)
复制代码 代码如下:
@Controller
@RequestMapping(value = "/upload")
public class FileUploadController {
private Logger logger;
@RequestMapping(value = "upload.do", method = RequestMethod.POST)
public void fileUpload(HttpServletRequest request, HttpServletResponse response) {
Map
String newRealFileName = null;
try {
MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
CommonsMultipartFile file = (CommonsMultipartFile) multipartRequest.getFile("file");
// 获得文件名：
String realFileName = file.getOriginalFilename();
if(file.getSize()/1024>=5*1024){
resultMap.put("status", 1);
resultMap.put("message", "图片不能大于5M");
}else{
System.out.println("获得文件名：" + realFileName);
newRealFileName = FileUploadController.getNowTime() + realFileName.substring(realFileName.indexOf("."));
// 获取路径
String ctxPath = request.getSession().getServletContext().getRealPath("//") + "//temp//";
// 创建文件
File dirPath = new File(ctxPath);
if (!dirPath.exists()) {
dirPath.mkdir();
}
File uploadFile = new File(ctxPath + newRealFileName);
FileCopyUtils.copy(file.getBytes(), uploadFile);
request.setAttribute("files", loadFiles(request));
resultMap.put("status", 0);
resultMap.put("fileName", newRealFileName);
}
} catch (Exception e) {
resultMap.put("status", 1);
resultMap.put("message", "图片上传出错");
logger.info("***** 图片上传出错 *****");
System.out.println(e);
} finally {
PrintWriter out = null;
try {
out = response.getWriter();
} catch (IOException e) {
e.printStackTrace();
}
//必须设置字符编码，否则返回json会乱码
response.setContentType("text/html;charset=UTF-8");
out.write(JSONSerializer.toJSON(resultMap).toString());
out.flush();
out.close();
}
}
}
