一、文件上传条件：
1、依赖表单，请求方式为post, enctype="multipart/form-data"
2、表单中有file类型的input
二、提交文件上传的表单，不需要页面跳转，用jquery.form.js插件。以ajax方式提交表单
1 function submitUpload(){ 2 ????var option = { 3 ????????????url:path+"/upload/uploadPic.do",//上传的url 4 ????????????dataType:"text",//回调值的数据类型 5 ????????????success:function(responseText){ 6 ????????????????var jsonObject = $.parseJSON(responseText); 7 ????????????????//图片回显 8 ????????????????$("#imgsImgSrc").attr("src",jsonObject.realPath); 9 ????????????????//图片相对路径用于数据库保存10 ????????????????$("#imgs").val(jsonObject.relativePath);11 ????????????????//页面保存上次访问路径12 ????????????????$("#lastRealPath").val(jsonObject.realPath);13 ????????????},14 ????????????error:function(){15 ????????????????alert("系统错误");16 ????????????}17 ????};18 ????//使用ajax方式提交表单19 ????$("#form111").ajaxSubmit(option);20 }三、在springMVC配置文件中设置
<!-- 复杂类型文件上传 --> ???<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> ???????<property name="maxInMemorySize" value="1024000"/> ???</bean>
四、文件服务器设置为只读
1 <init-param>2 ????????????<param-name>readonly</param-name>3 ????????????<param-value>false</param-value>4 ????????</init-param>
五、创建文件上传方法
@Controller@RequestMapping("/upload")public class EbUploadController { ???????@RequestMapping("/uploadPic.do") ???public void uploadPic(HttpServletRequest request,PrintWriter pw,String lastRealPath) throws IOException { ???????MultipartHttpServletRequest req = (MultipartHttpServletRequest) request; ???????//获得input类型的name属性 ???????Iterator<String> inputNames = req.getFileNames(); ???????String inputName = inputNames.next(); ???????//获得文件 ???????MultipartFile file = req.getFile(inputName); ???????//将文件转化成字节数组 ???????byte[] fileBytes = file.getBytes(); ???????????????//定义文件名 ???????String fileName = new SimpleDateFormat("yyyyMMddHHmmssSSS").format(new Date()); ???????Random random = new Random(); ???????for(int i=0;i<3;i++) { ???????????fileName = fileName + random.nextInt(10); ???????} ???????//获得原始文件名 ???????String oriName = file.getOriginalFilename(); ???????//获得后缀名 ???????String suffix = oriName.substring(oriName.lastIndexOf(".")); ???????String realPath = ECPSUtils.readProp("upload_file_path")+"/upload/"+fileName + suffix; ???????String relativePath = "/upload/" + fileName + suffix; ???????????????????????//不同主机文件上传,创建jersey客户端 ???????Client client = Client.create(); ???????//判断比较上次文件路径是否为空，如果不为空，则需要先删除上次图片 ???????if(StringUtils.isNotBlank(lastRealPath)) { ???????????WebResource wr = client.resource(lastRealPath); ???????????wr.delete(); ???????} ???????????????//指定上传的绝对路径 ???????WebResource wr = client.resource(realPath); ???????//文件上传 ???????wr.put(fileBytes); ???????????????//回传绝对路径与相对路径 ???????JSONObject jo = new JSONObject(); ???????jo.accumulate("realPath", realPath); ???????jo.accumulate("relativePath", relativePath); ???????String responseText = jo.toString(); ???????pw.print(responseText); ???????????????????}}图片文件上传
原文地址：https://www.cnblogs.com/cat-fish6/p/9384931.html