整理文档，搜刮出一个SpringMvc MultipartFile实现图片文件上传示例，稍微整理精简一下做下分享。
spring-servlet.xml
<!-- SpringMVC上传文件时，需要配置MultipartResolver处理器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="UTF-8" /> <!-- 指定所上传文件的总大小,单位字节。注意maxUploadSize属性的限制不是针对单个文件，而是所有文件的容量之和 --> <property name="maxUploadSize" value="10240000" /> </bean>
upload/index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE HTML><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>单图片上传</title></head><body><fieldset><legend>图片上传</legend><h2>只能上传单张10M以下的 PNG、JPG、GIF 格式的图片</h2><form action="/shop/auth/photoUpload" method="post" enctype="multipart/form-data"> 选择文件:<input type="file" name="file"> <input type="submit" value="上传"> </form></fieldset></body></html>
或者使用ExtJs
js/user/photoUpload.js
Ext.onReady(function(){ Ext.create('Ext.form.Panel', { title: '图片上传', width: 600, bodyPadding: 10, frame: true, renderTo: Ext.getBody(), items: [{ xtype: 'filefield', name: 'file', fieldLabel: 'Photo', labelWidth: 50, msgTarget: 'side', fileUpload: true , allowBlank: false, blankText:"Select an image", emptyText: 'You can only upload a single PNG 10M or less, JPG, GIF format images', anchor: '100%', buttonText: '选择图片' }], buttons: [{ text: '上传', handler: function() { var form = this.up('form').getForm(); if(form.isValid()){ form.submit({ url: '/shop/auth/photoUpload', waitMsg: '正在上传图片...', success: function(fp, o) { Ext.Msg.alert('提示', o.result.msg); } }); } } }] });});
pages/user/photoUpload.html
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>图片上传</title></head><link href="../../ext-4.2.1.883/resources/css/ext-all.css" rel="external nofollow" rel="stylesheet" type="text/css" /><script type="text/javascript" src="../../ext-4.2.1.883/ext-all.js"></script><script src="../../js/user/photoUpload.js" type="text/javascript"></script><body></body></html>
AuthController.java
/** * 图片文件上传 */ @ResponseBody @RequestMapping(value = "/photoUpload",method = RequestMethod.POST) public ResultData<Object> photoUpload(MultipartFile file,HttpServletRequest request,HttpServletResponse response,HttpSession session) throws IllegalStateException, IOException{ ResultData<Object> resultData=new ResultData<>(); // 判断用户是否登录 if (file!=null) {// 判断上传的文件是否为空 String path=null;// 文件路径 String type=null;// 文件类型 String fileName=file.getOriginalFilename();// 文件原名称 System.out.println("上传的文件原名称:"+fileName); // 判断文件类型 type=fileName.indexOf(".")!=-1?fileName.substring(fileName.lastIndexOf(".")+1, fileName.length()):null; if (type!=null) {// 判断文件类型是否为空 if ("GIF".equals(type.toUpperCase())||"PNG".equals(type.toUpperCase())||"JPG".equals(type.toUpperCase())) { // 项目在容器中实际发布运行的根路径 String realPath=request.getSession().getServletContext().getRealPath("/"); // 自定义的文件名称 String trueFileName=String.valueOf(System.currentTimeMillis())+fileName; // 设置存放图片文件的路径 path=realPath+trueFileName; System.out.println("存放图片文件的路径:"+path); // 转存文件到指定的路径 file.transferTo(new File(path)); System.out.println("文件成功上传到指定目录下"); }else { System.out.println("不是我们想要的文件类型,请按要求重新上传"); return null; } }else { System.out.println("文件类型为空"); return null; } }else { System.out.println("没有找到相对应的文件"); return null; } return resultData; }
ResultData.java 代码如下:
public class ResultData<T> { private T data; private int code =200; private String msg; private Boolean success = true; public Boolean getSuccess() { return success; } public void setSuccess(Boolean success) { this.success = success; } public T getData() { return data; } public void setData(T data) { this.data = data; } public int getCode() { return code; } public void setCode(int code) { if(200 != code){ success = false; } this.code = code; } public String getMsg() { return msg; } public void setMsg(String msg) { this.msg = msg; }}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
