SpringMVC使用FileUpload进行文件上传

导入FileUpload和common-io的Jar包

注意：1、Struts2需要使用其他方法：struts2过滤时，会改变reqeust的类型，由HttpServletRequest变成MultiPartRequestWrapper

1、Test.jsp:

<form action="<%=basePath%>self/testFileUpload.do" method="post" enctype="multipart/form-data">
<input type="text" name="num">
<input name="img1" type="file" accept="image/gif,image/jpg,image/png,image/jpeg"/>
<input name="img2" type="file" accept="image/gif,image/jpg,image/png,image/jpeg"/>
<input type="submit" name="test">
<input type="reset" name="test1">
</form>

2、controller:

@RequestMapping(value="/testFileUpload")
public void  testFileUpload(HttpServletRequest request,HttpServletResponse response) throws Exception{
String num = "";
String img1 = "";
String img2 = "";
String fileName = "";
try {
String t = request.getCharacterEncoding();
boolean isMultipart = ServletFileUpload.isMultipartContent(request);//判断是否是表单文件类型
if(isMultipart){
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding(request.getCharacterEncoding());//这里很重要啊 解决linux环境下上传文件名乱码的问题
//upload.setFileSizeMax(3*1024*1024);//3M
List items = upload.parseRequest(request);
if(items.size() == 0){
System.out.println("无数据");
}
Iterator<Object> formItem = items.iterator();
while(formItem.hasNext()){
FileItem item = (FileItem) formItem.next();
//如果是表单元素
if(item.isFormField()){
if (item.getFieldName().equals("num")) {
num = item.getString(request.getCharacterEncoding()).trim();
}
}
//如果不是表单元素
if(!item.isFormField()){
String name = item.getName();
String type = item.getContentType();
long sizeInBytes = item.getSize();

try {
String fullName = item.getName().trim();
if(fullName != ""){
fileName = System.currentTimeMillis() + fullName.substring(fullName.indexOf("."));
if(item.getFieldName().equals("img1")){
fileName = "img1-" + System.currentTimeMillis() + fullName.substring(fullName.indexOf("."));
}
if(item.getFieldName().equals("img2")){
fileName = "img2-" + System.currentTimeMillis() + fullName.substring(fullName.indexOf("."));
}
String tomcatRoot = FileOperator.getRootPath();
String path = tomcatRoot;
if(FileOperator.FileUploadEx(path, fileName, item.getSize(), item.getInputStream())){
if(item.getFieldName().equals("img1")){
System.out.println("testimg1");
}
if(item.getFieldName().equals("img2")){
System.out.println("testimg2");
}
}
}

} catch (Exception e) {
e.printStackTrace();
}
}
}
}else{
System.out.println("非multipart/form-data提交方式");
}

} catch (Exception e) {
e.printStackTrace();
}
}