1、环境 ： JDK 1.6 , Tomcat 7.0
2、第三方类库：
commons-fileupload-1.3.1.jar
commons-io-2.4.jar
3、web.xml配置：
<servlet>
<servlet-name>FileUpload</servlet-name>
<servlet-class>java02.rhythmk.com.FileUploadServlet</servlet-class>
<init-param>
<param-name>filepath</param-name>
<param-value>uploadfile</param-value>
</init-param>
<init-param>
<param-name>temppath</param-name>
<param-value>temp</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>FileUpload</servlet-name>
<url-pattern>/FileUpload.html</url-pattern>
</servlet-mapping>
4、 jsp ：
<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
<!-- enctype 默认是 application/x-www-form-urlencoded -->
<form action="FileUpload.html" enctype="multipart/form-data" method="post" >
rhythmk:：<input type="text" name="rhythmk"> <br/>
上传文件：<input type="file" name="file1"><br/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
5、Servlet：
package java02.rhythmk.com;
import java.io.File;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
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;
/**
* Servlet implementation class FileUploadServlet
*/
@WebServlet("/FileUploadServlet")
public class FileUploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private static String filepath = "";
private static String temp = "";
/**
* Default constructor.
*/
public FileUploadServlet() {
// TODO Auto-generated constructor stub
}
@Override
public void init(ServletConfig config) throws ServletException {
// TODO Auto-generated method stub
super.init(config);
if (filepath == "" || temp == "") {
filepath = config.getInitParameter("filepath");
temp = config.getInitParameter("temppath");
ServletContext context = getServletContext();
filepath = context.getRealPath(filepath);
temp = context.getRealPath(temp);
System.out.println("filepath:" + filepath + ",temp:" + temp);
}
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
* response)
*/
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=UTF-8");
request.setCharacterEncoding("UTF-8");
try {
DiskFileItemFactory foctory = new DiskFileItemFactory();
// 设置临时文件
foctory.setRepository(new File(temp));
// 设置临时文件缓存区大小
foctory.setSizeThreshold(1024 * 1024);
ServletFileUpload sFileUpload = new ServletFileUpload(foctory);
List<FileItem> list = (List<FileItem>) sFileUpload
.parseRequest(request);
for (FileItem item : list) {
String name = item.getFieldName();
if (item.isFormField()) {
System.out.println("filedName:" + name + ",value:"
+ item.getString());
} else {
String filename = item.getName();
System.out.println("value:" + filename);
if (filename.length() > 0) {
System.out.println("文件保存路径：" + filepath + "\"
+ filename);
File file = new File(filepath);
if (!file.exists()) {
file.mkdir();
}
// 保存文件
item.write(new File(filepath, filename));
response.getWriter().write(
"文件保存路径：" + filepath + "\" + filename);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}