我必须上传多个.csv文件，就像我有五个文本框一样，每个文本框都会有相应的浏览按钮。当我点击提交按钮时，它必须在mysql数据库中创建具有文本框值名称的表，并且该表必须用.csv文件更新。请任何人建议我如何操作。
谢谢。这是我的代码。
servlet.java：
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
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.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class CommonsFileUploadServlet1 extends HttpServlet {
private static final String TMP_DIR_PATH=System.getProperty("user.home");
private File tmpDir;
private static final String DESTINATION_DIR_PATH ="/";
private File destinationDir;
public void init(ServletConfig config) throws ServletException {
super.init(config);
tmpDir = new File(TMP_DIR_PATH);
if(!tmpDir.isDirectory()) {
throw new ServletException(TMP_DIR_PATH + " is not a directory");
}
String realPath =getServletContext().getRealPath(DESTINATION_DIR_PATH);
destinationDir = new File(realPath);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
response.setContentType("text/plain");
DiskFileItemFactory fileItemFactory = new DiskFileItemFactory ();
/*
*Set the size threshold, above which content will be stored on disk.
*/
fileItemFactory.setSizeThreshold(1*1024*1024); //1 MB
/*
* Set the temporary directory to store the uploaded files of size above threshold.
*/
fileItemFactory.setRepository(tmpDir);
ServletFileUpload uploadHandler = new ServletFileUpload(fileItemFactory);
try {
/*
* Parse the request
*/
int check=0;
String name1[]=new String[30];
String name2[]=new String[30];
String name3[]=new String[30];
String filename[]=new String[30];
List items = uploadHandler.parseRequest(request);
Iterator itr = items.iterator();
while(itr.hasNext()) {
FileItem item = (FileItem) itr.next();
/*
* Handle Form Fields.
*/
if(item.isFormField()) {
if(item.getFieldName().equals("text1"))
{
String name1[i]=item.getString();
}
if(item.getFieldName().equals("text2"))
{
String name2[i]=item.getString();
}
if(item.getFieldName().equals("text3"))
{
String name3[i]=item.getString();
}
if(item.getFieldName().equals("check"))
{
check=Integer.parseInt(item.getString());
}
} else {
//Handle Uploaded files.
String filename[i]=item.getName();
}
i++;
}
request.setAttribute("name1",name1);
request.setAttribute("name2",name2);
request.setAttribute("name3",name3);
request.setAttribute("filename",filename);
if(check==1)
{
RequestDispatcher dispatcher = request.getRequestDispatcher("programmelink.jsp");
if (dispatcher != null){
dispatcher.forward(request, response);
}
}
out.close();
}catch(FileUploadException ex) {
log("Error encountered while parsing the request",ex);
} catch(Exception ex) {
log("Error encountered while uploading file",ex);
}
}
}
programmelink.jsp：
<%@page import="com.hcu.mysql.connection.ConnectionDemo1"%>
<%@include file="dbconnection.jsp"%>
<%@page import="java.sql.*"%>
<%@page import="java.io.OutputStream"%>
<%@page import="java.io.FileOutputStream"%>
<%@page import="java.io.InputStream"%>
<%@page import="java.io.FileInputStream"%>
<%@page import="java.io.File"%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<center>
<table border="2">
<%
String pname[]=(String[])request.getAttribute("name1");
String saveFile[]=(String[])request.getAttribute("filename");
Statement st1=con.createStatement();
Statement st2=con.createStatement();
try
{
int i;
for(i=0;i<pname.length;i++)
{
pname[i]=pname[i].replace('-', '_');
String realPath =getServletContext().getRealPath("/");
File f1 = new File(realPath+saveFile[i]);
File f2 = new File("/var/lib/mysql/dcis_attendance_system/"+saveFile[i]);
InputStream in = new FileInputStream(f1);
OutputStream out1 = new FileOutputStream(f2);
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0){
out1.write(buf, 0, len);
}
Class.forName("com.mysql.jdbc.Driver").newInstance();
System.out.println("driver connected");
st1.executeUpdate("create table if not exists "+pname[i]+"_curriculum(subjid varchar(20),subjname varchar(100),credits varchar(20),semister varchar(20),sno INT) ");
String qry2="LOAD DATA INFILE '"+saveFile[i]+"' INTO TABLE "+pname[i]+"_curriculum FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '\"' LINES TERMINATED BY '\n' (subjid,subjname,credits,semister,sno)";
st2.executeUpdate(qry2);
}
out.println("<center><h1>File uploaded sucessfully</h1></center>");
}
catch(Exception e)
{
out.println("<center><h1>File not uploaded sucessfully</h1></center>");
}
%>
</table>
</center>
jsppage.jsp
<form action="servlet" enctype="multipart/form-data" method="POST">
<input type="hidden" name="check" value="7" />
</table>
<table align="center" border="1" id="table1">
<tr>
<td class="heading" align="center">Programme Name</td>
<td class="heading" align="center">Programme Code</td>
<td class="heading" align="center">Browse Curriculum</td>
</tr>
<%int i;
for(i=0;i<2;i++)
{
%>
<tr>
<td><input type="text" name="text1" size="11" value=""> </td>
<td><input type="text" name="text2" size="10" value=""> </td>
<td><input type="file" name="file1" class="multi" id="file"></td>
</tr>
<%}%>
</table>
<table align="center">
<tr>
<td><input type="submit" name="submit" value="submit"></td>
<td><input type="button" name="add" value="Add" onclick="next();"></td>
</tr>
</table>
</form>
答案 0 :(得分：0)
我认为这会给你一个想法：D使用数组进行多重上传，而不是使用很多上传按钮。
<td><input type="file" name="file[]" class="multi" id="file"></td>