Spring Mvc 上传图片全部过程

我也是google和百度和很久一点一点弄的……，希望能帮助到你。

直接看代码吧……

<tr>
<td align="right">图片:</td><td>  <form:hidden path="picPath" id="picPath"></form:hidden>
<span id="${uuid}-statusPic" style="color: #666;">
<a href="javascript:void(0)" onclick="window.smartMenu.insert.replaceString()">预览</a></span>
 <a class="easyui-linkbutton" onclick="$('#${uuid}-uploadWindow').window('open')">修改</a>
</td>
</tr>

<!-- 点击修改调出窗口 -->

<div id="${uuid}-uploadWindow" class="easyui-window" title="图片上传" modal="true" resizable="false" collapsible="false" minimizable="false" maximizable="false" closed="true" style="width:520px;height:100px;padding:5px;background: #fafafa;">
<div class="easyui-layout  with iframe" fit="true">
<div region="center" border="false" style="padding:10px;background:#fff;border:1px solid #ccc;">
<form action="menu/SmartMenu.do?action=uploadFile" method="post" enctype="multipart/form-data" style="color: #666;" id="${uuid}-tforma">
<input type="hidden" name="picPath" id="${uuid}-picPath" value="${command.picPath}"/>
图片路径: <input type="file" name="itemPic" alt="" accept="image/*" id="${uuid}-itemPic">图片大小不超过2M<input  class="easyui-linkbutton" type="submit" value="上传">
</form>
</div>
</div>
</div>

<!-- 页面刚刚加载时调用 -->

init: function(uuid) {
// this.identifier 是设定的全局变量，uuid是页面加载时的唯一编码
 this.identifier = uuid;
// 图片上传
var idf = this.identifier;
var that = this;
$('#'+idf+'-tforma').ajaxForm({
dataType : 'json',
beforeSubmit : function(a, f, o) {
$('#'+idf+'-statusPic').html('上传中...');
},
success : function(data) {
if (typeof (data) == 'string')
data = eval('(' + data + ')');
$('#'+idf+'-uploadWindow').window('close');
if ("success" == data.message) {
$('div[identifier='+that.identifier+']').find('#picPath').val(data.path);
$("#"+idf+"-path").val(data.path);
$("#"+idf+"-statusPic").html( "<a target='window' href='" + data.path .replace( "\\", "/") + "'>预览</a>");
} else if ("error" == data.message)
$("#"+idf+"-statusPic").html("非图片数据!");
else
$("#"+idf+"-statusPic").html("上传数据错误!");
$("#"+idf+"-itemPic").val('');
},
error : function(jqXHR, textStatus,errorThrown) {
$('#$'+idf+'-uploadWindow').window('close');
//console.log("error:"+ data.responseText);
//console.log("status:" + textStatus);
$("#"+idf+"-statusPic").html("上传失败!");
$("#"+idf+"-itemPic").val('');
} });
}

/**
* <b>商品上传指定的图片</b>
*
* @param request
* @param response
* @param command
* @return
* @throws Exception
*/
public ModelAndView uploadFile(HttpServletRequest request, HttpServletResponse response, SmartMenu command) throws Exception {
PrintWriter writer = null;
try {
response.setContentType("application/json; charset=GBK");
writer = response.getWriter();

MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
String source = request.getSession().getServletContext().getRealPath("/");
// 获得第1张图片（根据前台的name名称得到上传的文件）
MultipartFile imgFile1 = multipartRequest.getFile("itemPic");
// 判断是否是重复上传图片（如果重复将删除旧图片）
String sourceImg = request.getParameter("path");
if (imgFile1.getContentType().split("/")[0].equals("image")) {
if (null != sourceImg && !"".equals(sourceImg)) {
System.out.println("旧图片路径:" + sourceImg);
File f = new File(source + sourceImg);
if (f.isFile()) {
f.delete();
System.out.println(" 删除成功");
} else
System.out.println(" 删除失败!");
}
String path = null;
if (imgFile1 != null && imgFile1.getSize() > 0) {
path = this.getSmartMenuService().storeFile(request.getSession(), imgFile1);
}
writer.print("{\"message\":\"success\",\"path\":\"" + path.replace("\\", "\\\\") + "\"}");
} else
writer.print("{\"message\":\"error\"}");
} catch (Exception e) {
// TODO: handle exception
writer.print("{\"message\":\"no\"}");
}
writer.flush();
writer.close();
return null;
}

@Override
public String storeFile(HttpSession session, MultipartFile file) throws Exception {
// TODO Auto-generated method stub
String fileType = file.getContentType().split("/")[1];
String path = session.getServletContext().getRealPath("/");
String separator = File.separator;
String uuid = UUID.randomUUID().toString();
FileOutputStream fos = null;
String fileName = null;
try {
InputStream fis = file.getInputStream();
// 转换文件为png格式，并保存在同名目录下
File files = new File(path + "\\dishpic");
// 判断文件夹是否存在,如果不存在则创建文件夹
if (!files.exists()) {
files.mkdir();
}
if (file.getContentType().split("/")[0].equals("image")) {
if (path.endsWith(separator))
fileName = path + "dishpic" + separator + uuid + ".png";
else
fileName = path + separator + "dishpic" + separator + uuid + ".png";
fos = new FileOutputStream(fileName);
ImageUtil.convertFormat(fis, fos, fileType, "png", 0, 0);
fos.flush();
fos.close();
}
} catch (Exception ex) {
System.out.println("文件取出失败，错误信息: " + ex.getMessage());
if (fos != null)
fos.close();
throw ex;
}
return "dishpic" + separator + uuid + ".png";
}

/**
* <b>1.对图片时行格式转换</b><br/>
* <b>2.对图片进行适度的大小裁剪</b>
*
*/
public class ImageUtil {

/**
*
* @param infile 输入文件
* @param outfile 输出文件
* @param srcFormat 源格式
* @param destFormat 输出格式
* @return
* @throws Exception
*/
public static boolean convertFormat(InputStream infile,
OutputStream outfile, String srcFormat, String destFormat, int width ,int height) throws Exception {
boolean flag = false;
BufferedImage src = ImageIO.read(infile);
if(height > 0  && width > 0) {// compress the origin image if width and height are non-zero
height = src.getHeight() > height ? height: src.getHeight();
width = src.getWidth() > width ? width : src.getWidth();
Image image = src.getScaledInstance(width, height, Image.SCALE_DEFAULT);//这个是用来进行图片大小调整的

BufferedImage tag = new BufferedImage(width, height,
BufferedImage.TYPE_INT_RGB);

Graphics g = tag.getGraphics();
//可在下面对图片进行绘制和更改
g.drawImage(image, 0, 0, null); // 绘制缩小后的图

g.dispose();
tag.flush();
flag = ImageIO.write(tag, destFormat, outfile);// 输出到经过缩放的文件流
} else {
flag = ImageIO.write(src, destFormat, outfile);//输出原分辨率的图片
}
Logger.getLogger(ImageUtil.class).info("图片转换成功: 从[" + srcFormat + "]到[" + destFormat + "]");
return flag;
}
}

<!-- xml中要配置这段代码 -- >

<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize">
<value>2048576</value>
</property>
</bean>

该代码是经测试使用的源码，但是还存在问题！我直接截的图片能够上传，修改过的图片不能上传，会报错

在

BufferedImage src = ImageIO.read(infile);

ImageIO读jpg的时候出现javax.imageio.IIOException: Unsupported Image Type  ！