在測试本例至少须要在web程序的WEB-INF/lib下包括commons-fileupload- 1.2.1和commons-io-1.3.2两个类库。
fileupload.jsp
<%@ page contentType="text/html; charset=gb2312" %> <%@ page import="java.io.*" %> <%@ page import="java.util.*" %> <%@ page import="org.apache.commons.io.*" %> <%@ page import="org.apache.commons.fileupload.*" %> <%@ page import="org.apache.commons.fileupload.disk.*" %> <%@ page import="org.apache.commons.fileupload.servlet.*" %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>文件传输样例</title> </head> <body> <% boolean isMultipart = ServletFileUpload.isMultipartContent(request);//检查表单中是否包括文件 if(isMultipart){ FileItemFactory factory = new DiskFileItemFactory(); //factory.setSizeThreshold(yourMaxMemorySize); 此处可设置使用的内存最大值 //factory.setRepository(yourTempDirectory); 文件暂时文件夹 ServletFileUpload upload = new ServletFileUpload(factory); //upload.setSizeMax(yourMaxRequestSize);同意的最大文件尺寸 List items = upload.parseRequest(request); for(int i=0;i<items.size();i++){ FileItem fi = (FileItem)items.get(i); if(fi.isFormField()){//假设是表单字段 %> <%=fi.getFieldName()%>:<%=fi.getString("GB2312")%><BR> <% }else{//假设是文件 DiskFileItem dfi = (DiskFileItem)fi; if(!dfi.getName().trim().equals("")){//getName()返回文件名，假设是空字符串，说明没有选择文件。 %> 文件被上传到服务上的实际位置：<%=new File(application.getRealPath("/file")+System.getProperty("file.separator")+ FilenameUtils.getName(dfi.getName())).getAbsolutePath()%><br> <% dfi.write(new File(application.getRealPath("/file")+System.getProperty("file.separator")+ FilenameUtils.getName(dfi.getName()))); } } } } %> </body> </html>
Index.html
<HTML> <HEAD> <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=gb2312"> <TITLE>commons-fileupload-1.2.1实现文件上传</TITLE> </HEAD> <BODY> <P>commons-fileupload-1.2.1实现文件上传</P> <FORM NAME="fileupload" ACTION="fileupload.jsp" method="POST" ENCTYPE="multipart/form-data"> <!--必须指定表单的加密类型为 multipart/form-data --> <P>名称：<INPUT TYPE=TEXT NAME="name" SIZE=12 value="小明"></P> <P>性别：<INPUT TYPE=TEXT NAME="sex" SIZE=12 value="男"></P> <P>年龄：<INPUT TYPE=TEXT NAME="age" SIZE=12 value="28"></P> <P>文件：<INPUT TYPE=FILE NAME="file" SIZE=12></P> <P><INPUT TYPE=SUBMIT NAME="submit" VALUE="确定"></P> </FORM> </BODY> </HTML>