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
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<!-- 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>
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upload/index.jsp
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<%@ 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>
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或者使用ExtJs
js/user/photoUpload.js
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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);
}
});
}
}
}]
});
});
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pages/user/photoUpload.html
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<!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>
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AuthController.java
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/**
* 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
/*User user=(User) session.getAttribute("user");
if (user==null) {
resultData.setCode(40029);
resultData.setMsg("用户未登录");
return resultData;
}*/
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+/*System.getProperty("file.separator")+*/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;
}
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ResultData.java 代码如下:
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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;
}
}
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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服务器之家。
原文链接：http://www.cnblogs.com/LEARN4J/p/5426980.html