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jar包：
commons-fileupload-1.3.1.jar
commons-io-1.3.2.jar
maven库
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>1.3.2</version>
</dependency>
jsp:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | <%@ page contentType= "text/html;charset=UTF-8" language= "java" %> <html> <head> <title></title> </head> <body> <h1> this is file upload test!</h1> <form action= "/upload" method= "post" enctype= "multipart/form-data" > <input type= "text" name= "username" /> <input type= "file" name= "upfile" /> <input type= "submit" value= "submit" /> </form> </body> </html> |
servlet:
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | import org.apache.commons.fileupload.FileItemIterator; import org.apache.commons.fileupload.FileItemStream; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.fileupload.util.Streams; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; /** * fileupload上传测试 * * @author leizhimin 14-4-11 上午10:35 */ public class TestuploadServlet extends HttpServlet { @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { boolean flag = ServletFileUpload.isMultipartContent(req); FileOutputStream fos = null ; InputStream is = null ; try { if (flag) { ServletFileUpload upload = new ServletFileUpload(); FileItemIterator iter = upload.getItemIterator(req); while (iter.hasNext()){ FileItemStream fis = iter.next(); is = fis.openStream(); if (fis.isFormField()){ System.out.print(fis.getFieldName()); System.out.println( ":" + Streams.asString( is )); } else { System.out.println(fis.getName()); String path = req.getSession().getServletContext().getRealPath( "/upload" ); path = path+ "/" +fis.getName(); System.out.println(path); fos = new FileOutputStream(path); byte[] buff = new byte[ 1024 ]; int len = 0 ; while ((len= is .read(buff))> 0 ){ fos.write(buff, 0 ,len); } } } } } catch (Exception e){ } PrintWriter writer = resp.getWriter(); writer.print( "Hello World !" ); } private static final long serialVersionUID = 1L; } |
web.xml
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | <?xml version= "1.0" encoding= "UTF-8" ?> <web-app xmlns= "http://java.sun.com/xml/ns/javaee" xmlns:xsi= "http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http: //java.sun.com/xml/ns/javaee http: //java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version= "3.0" > <servlet> <servlet-name>upload</servlet-name> <servlet- class >TestuploadServlet</servlet- class > </servlet> <servlet-mapping> <servlet-name>upload</servlet-name> <url-pattern>/upload</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> <welcome-file>upload.jsp</welcome-file> </welcome-file-list> </web-app> |
运行结果：
| 1 2 3 | username:asdf qhtf.sql D:\IdeaProjects\fileuploadtest\web\upload/qhtf.sql |
本文转自 leizhimin 51CTO博客，原文链接：http://blog.51cto.com/lavasoft/1394053，如需转载请自行联系原作者