MVC 文件上传

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JSP页面：

<%@ page language="java" import="java.util.*,java.io.*" pageEncoding="GBK"%>

<%@ page import="org.apache.commons.fileupload.servlet.ServletFileUpload"%>

<%@ page import="org.apache.commons.fileupload.disk.DiskFileItemFactory"%>

<%@ page import="org.apache.commons.fileupload.*"%>

<% response.setContentType("text/html");

// 图片上传路径

String uploadPath =request.getSession().getServletContext().getRealPath("/")+"upload/images/";

// 图片临时上传路径

String tempPath = request.getSession().getServletContext().getRealPath("/")+"upload/images/temp/";

// 图片网络相对路径

String imagePath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath()+"/";

// 文件夹不存在就自动创建：

if(!new File(uploadPath).isDirectory())

new File(uploadPath).mkdirs();

if(!new File(tempPath).isDirectory())

new File(tempPath).mkdirs();

try {

DiskFileUpload fu = new DiskFileUpload();

// 设置最大文件尺寸，这里是4MB

fu.setSizeMax(4194304);

// 设置缓冲区大小，这里是4kb

fu.setSizeThreshold(4096);

// 设置临时目录：

fu.setRepositoryPath(tempPath);

// 得到所有的文件：

List fileItems = fu.parseRequest(request);

Iterator i = fileItems.iterator();

// 依次处理每一个文件：

while(i.hasNext()) {

FileItem file = (FileItem)i.next();

// 获得文件名，这个文件名是用户上传时用户的绝对路径：

String sourcefileName = file.getName();

if(sourcefileName!=null&&(sourcefileName.endsWith(".jpg")||sourcefileName.endsWith(".gif"))) {

// 在这里可以记录用户和文件信息,生成上传后的文件名

String destinationfileName=null;

Random rd = new Random();

Calendar time = Calendar.getInstance();

if(sourcefileName.endsWith(".jpg")){

destinationfileName=String.valueOf(time.get(Calendar.YEAR))

+ String.valueOf(time.get(Calendar.MONTH))

+ String.valueOf(time.get(Calendar.DAY_OF_MONTH))

+ String.valueOf(time.get(Calendar.HOUR_OF_DAY))

+ String.valueOf(time.get(Calendar.MINUTE))

+ String.valueOf(time.get(Calendar.SECOND))

+ String.valueOf(rd.nextInt(100)) + ".jpg";

}else if(sourcefileName.endsWith(".gif")){

destinationfileName=String.valueOf(time.get(Calendar.YEAR))

+ String.valueOf(time.get(Calendar.MONTH))

+ String.valueOf(time.get(Calendar.DAY_OF_MONTH))

+ String.valueOf(time.get(Calendar.HOUR_OF_DAY))

+ String.valueOf(time.get(Calendar.MINUTE))

+ String.valueOf(time.get(Calendar.SECOND))

+ String.valueOf(rd.nextInt(100)) + ".gif";

}

File f1=new File(uploadPath+ destinationfileName);

file.write(f1);

//sourcefileName

//out.print("成功上传！") ;

request.getSession().getServletContext().setAttribute("mainpath","upload////images////"+destinationfileName);

request.getSession().getServletContext().setAttribute("fillpath", uploadPath+destinationfileName);

System.out.println(request.getSession().getServletContext().getAttribute("mainpath"));

out.print("<img width=100px,height=100px src="+imagePath+"upload/images/"+destinationfileName+">");

}else{

out.println("上传文件出错，只能上传 *.jpg , *.gif");

}

// 跳转到上传成功提示页面

}

catch(Exception e) {

// 可以跳转出错页面

}

out.flush();

out.close();

%>

HTML测试页面：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

String path = request.getContextPath();

String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

<html>

<body>

<%--

类型enctype用multipart/form-data，这样可以把文件中的数据作为流式数据上传，不管是什么文件类型，均可上传。

--%>

<label>请选择头像:</label>

<hr>

</form>

function fsubmit(){

document.getElementById("form1").submit();

}

</script>

</body>

</html>

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