没有中文乱码问题。
1. 客户端使用HTML + JavaScript(AJAX)
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>Upload Demo</title>
<style type="text/css"></style>
<script src="js/jquery.js"></script>
<script src="js/ajaxupload.js"></script>
<script type="text/javascript">
$(function() {
// 创建AJAX方式上传文件
var $uploadBtn = $("#uploadBtn");
new AjaxUpload($uploadBtn, {
action: 'upload.action',
name: 'uploadfile',
onSubmit: function(file, ext){
$("#info").html("start upload file
");
},
onComplete: function(file, response){
$("#info").html(response);
}
});
});
</script>
</head>
<body>
<div id="info">Choose file to upload</div>
<input type="button" width="200px" id="uploadBtn" value="Upload Demo">
</body>
</html>
2. 服务器端使用Servlet：Apache commons-fileupload-1.2.1.jar和commons-io-1.3.2.jar
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
@SuppressWarnings("serial")
public class Uploader extends HttpServlet {
private ServletContext sc;
private String uploadDir = "downloads";
@Override
public void init(ServletConfig config) {
sc = config.getServletContext();
}
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
doPost(request, response);
}
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
request.setCharacterEncoding("UTF-8"); // 防止中文乱码
DiskFileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
try {
List items = upload.parseRequest(request);
Iterator itr = items.iterator();
while (itr.hasNext()) {
FileItem item = (FileItem) itr.next();
if (item.isFormField()) {
System.out.println("表单参数名：" + item.getFieldName() + ",表单参数值：" + item.getString("UTF-8"));
} else {
if (item.getName() != null && !item.getName().equals("")) {
System.out.println("上传文件的大小：" + item.getSize());
System.out.println("文件的类型：" + item.getContentType());
System.out.println("上传文件的名称：" + item.getName());// 返回上传文件在客户端的完整路径名称
File file = new File(sc.getRealPath("/") + File.separatorChar + uploadDir + File.separatorChar
+ item.getName());
item.write(file);
} else {
response.getWriter().println("没有选择文件");
}
}
}
} catch (Exception e) {
e.printStackTrace();
response.getWriter().println("上传文件失败");
}
response.getWriter().println("Ok");
}
}
From: http://hi.baidu.com/sophyishere/blog/item/b7b186131096511cb9127b5f.html