您好，当我提交表单“java.io.IOException:损坏的表单数据:过早结束”时出现此错误，当我将此代码添加到现有的 scriptlet 中时会发生此错误
String selectedValue=request.getParameter("sel1");
//out.println("Selected Value is: "+selectedValue);
String select1=request.getParameter("sel2");
//out.println("selected values is:"+select1);
String concat=selectedValue+"." +select1;
out.println(""+concat);
我现有的小脚本
<%@ page import="java.io.*,java.sql.*,java.util.zip.*,com.oreilly.servlet.*" %>
<%
try
{
//if i include here,i can retrive the values but i cant upload the file into database,shows me "java.io.IOException: Corrupt form data: premature ending "
String selectedValue=request.getParameter("sel1");
//out.println("Selected Value is: "+selectedValue);
String select1=request.getParameter("sel2");
//out.println("selected values is:"+select1);
String concat=selectedValue+"." +select1;
out.println(""+concat);
Connection connection = null;
String connectionURL = "jdbc:mysql://localhost:3306/ksa";
PreparedStatement psmnt = null;
MultipartRequest request2=new MultipartRequest(request,"/home/adapco/Desktop/output",1024*1024*1024);
String filename=request2.getFilesystemName("file");
File f=request2.getFile("file");
out.println(f.exists()+"----------------"+f.getAbsolutePath());
out.print(filename);
Class.forName("com.mysql.jdbc.Driver").newInstance();
connection = DriverManager.getConnection(connectionURL, "root", "root");
psmnt = connection.prepareStatement("insert into file1(file_path) values(?)");
psmnt.setString(1, f.getPath());
int s = psmnt.executeUpdate();
//if i include here it shows me null.null
String selectedValue=request.getParameter("sel1");
//out.println("Selected Value is: "+selectedValue);
String select1=request.getParameter("sel2");
//out.println("selected values is:"+select1);
String concat=selectedValue+"." +select1;
out.println(""+concat);
if(s>0)
{
System.out.println("Uploaded successfully !");
}
else
{
System.out.println("Error!");
}
}
catch(Exception e)
{
out.print("-----------error--------------"+e);
}
%>
如果我从现有的代码中排除代码，它工作正常。有时如果我在 catch 之后或 try block 的末尾包含代码，它会显示 null。我需要读取下拉列表的索引值并用点连接它们。错误是“null.null”。实际结果应该是示例:1.1。 这是我的 html 代码
<%@ page language="java" %>
<HTML>
<FORM ENCTYPE="multipart/form-data" ACTION="uploadFile.jsp" METHOD=POST>
<center>
<table bgcolor=#38ACEC>
<tr>
<center><td colspan="2" align="center"><B>UPLOAD THE FILE</B><center></td>
</tr>
<tr><td colspan="2" align="center"> </td></tr>
<tr><td><b>Choose the file To Upload:</b></td>
<td><INPUT NAME="file" TYPE="file"></td>
</tr>
<tr><td><select name="sel1">
<option value="1">Aerospace</option>
<option value="2">Automotive</option>
<option value="3">Energy</option>
<option value="4">IC Engines</option>
<option value="5">Wind</option>
<option value="6">Turbo</option>
<option value="7">IT</option>
<option value="8">Training</option>
</select>
<br>
<select name="sel2">
<option value="1">Internal</option>
<option value="2">Demos</option>
<option value="3">Best Practice</option>
<option value="4">Marketing</option>
<option value="5">Papers & public</option>
<option value="6">Validation</option>
<option value="7">Training</option>
</select></td></tr>
<tr><td colspan="2" align="center"> </td></tr>
<tr><td colspan="2" align="center"><input type="submit" value="Send File"> </td></tr>
<table>
</center>
</FORM>
</html>
最佳答案
这是一个非常古老的例子。Oreilly 多部分解析器 MultipartRequest 有一些错误。有关概述，请参阅相关问题 Corrupt form data: premature ending (Resolved) .而是使用 Apache Commons FileUpload或者只是新的 Servlet 3.0 内置在 request.getPart() 方法中。另见 How to upload files in JSP/Servlet?
关于mysql - java.io.IOException : Corrupt form data: premature ending 异常，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10292993/