提交表单不能取参数的典型例子

String img=myFile.getFileName();
img = conn.ex_chinese(img);
String title=request.getParameter("title");
   title = conn.ex_chinese(title);
String writer=request.getParameter("writer");
   writer = conn.ex_chinese(writer);
String time1=new java.util.Date().toLocaleString();
String content=request.getParameter("content");
   content = conn.ex_chinese(content);
String insert="INSERT into linkway.news
(news_title,news_writer,news_content,news_time,news_img) VALUES ('"+title+"','"+writer+"','"+content+"',to_date('"+time1+"','yyyy-mm-dd hh24:mi:ss'),'"+img+"')";
conn.executeUpdate(insert);最后插入数据库的值都是null值,求解.......

解决方案 »

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去下载个smartupload来上传你的图像和文本！很好用的，你可以自己看他里面的例子！简单的很！
ENCTYPE="multipart/form-data类型的form，是不能用request.getParameter方法获得的，可以用jspsmartupload组件获得，这跟ASP用request.form方法不能获得表单数据一样
我正是用jspsmartupload的上传到目录的，但jspsmartupload有什么组件可以取其他表单域的参数值啊，正如上例的title、content等？？
可以的！
在你的处理页面加上如下语句：
Request res = yourSmartUpload.getRequest();
此时你可在页面上进行调用res.getParameter("title")
如果你不明白原理就看看servlet相关资料
在SmartUpload类中作了如下初始化
public final void initialize(PageContext pageContext)
        throws ServletException
    {
        m_application = pageContext.getServletContext();
        m_request = (HttpServletRequest)pageContext.getRequest();
        m_response = (HttpServletResponse)pageContext.getResponse();
    }
并用定义了如下方法：
private Request m_formRequest;
public SmartUpload()
    {
        //...
        m_formRequest = new Request();
    }
public Request getRequest()
    {
        return m_formRequest;
    }
在upload()方法中有如下调转语句：
    private int m_startData;//开始
    private int m_endData;//结束
public void upload() throws...
{
        String fieldName = new String();//字段名
        boolean isFile = false;
        m_totalBytes = m_request.getContentLength();//post的内容字节大小
        m_binArray = new byte[m_totalBytes];
//...
        if(isFile){//如果是文件}
        else
        {
                String value = new String(m_binArray, m_startData, (m_endData - m_startData) + 1);
                m_formRequest.putParameter(fieldName, value);
        }
//...
}
to poppop(光盘) :按你意思加了上去，但还是有问题，望指教
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<%@ page language="java" contentType="text/html; charset=gb2312"%>
<jsp:useBean id="conn" scope="page" class="Webbeans.OraConnection" />
<jsp:useBean id="mySmartUpload" scope="page" class="com.jspsmart.upload.SmartUpload" />
<%%>
<html>
<head>
<title>上传新闻处理</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head><body>
成功保存
<a href="upnews.jsp">返回</a> 
<%
Request res = yourSmartUpload.getRequest();
// Variables
int count=0; // Initialization
mySmartUpload.initialize(pageContext);
// Only allow txt or htm files
mySmartUpload.setAllowedFilesList("htm,html,txt,jpg,gif,,");
// Upload
mySmartUpload.upload(); // Select each file
// Retreive the current file
com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(0);
String img=myFile.getFileName();
img = conn.ex_chinese(img);
String title=res.getParameter("title");
 title = conn.ex_chinese(title);
String writer=res.getParameter("writer");
 writer = conn.ex_chinese(writer);
String time1=new java.util.Date().toLocaleString();
String content=res.getParameter("content");
 content = conn.ex_chinese(content);
String insert="INSERT into linkway.news (news_title,news_writer,news_content,news_time,news_img) VALUES ('"+title+"','"+writer+"','"+content+"',to_date('"+time1+"','yyyy-mm-dd hh24:mi:ss'),'"+img+"')";
conn.executeUpdate(insert); // Save it only if this file exists
if (!myFile.isMissing()) { // Save the files with its original names in a virtual path of the web server
myFile.saveAs("/news/img/" + myFile.getFileName());
// myFile.saveAs("/upload/" + myFile.getFileName(), mySmartUpload.SAVE_VIRTUAL); // sample with a physical path
// myFile.saveAs("c:\\temp\\" + myFile.getFileName(), mySmartUpload.SAVE_PHYSICAL); // Display the properties of the current file
out.println("文件大小：" + myFile.getSize() + " ");
out.println("文件名： " + myFile.getFileName() + " ");
out.println("本地路径 : " + myFile.getFilePathName() + " ");
out.println("服务器路径： " + myFile.getFilePathName() + " ");
out.println("文件类型： " + myFile.getFileExt() + " "); count ++; } // Display the number of files uploaded
out.println(count + " 文件已上传");
%>
<%

%>
</body>
</html>
打错了上边应该是Request res = mySmartUpload.getRequest();
===============================================================================
org.apache.jasper.JasperException: Unable to compile class for JSPAn error occurred at line: 16 in the jsp file: /htgl/upnews_process.jspGenerated servlet error:
    [javac] Compiling 1 source fileC:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\htgl\upnews_005fprocess_jsp.java:86: cannot resolve symbol
symbol  : class Request
location: class org.apache.jsp.htgl.upnews_005fprocess_jsp
Request res = mySmartUpload.getRequest();
        ^An error occurred at line: 16 in the jsp file: /htgl/upnews_process.jspGenerated servlet error:
C:\Tomcat 5.0\work\Catalina\localhost\_\org\apache\jsp\htgl\upnews_005fprocess_jsp.java:86: cannot resolve symbol
symbol  : variable mySmartUpload
location: class org.apache.jsp.htgl.upnews_005fprocess_jsp
Request res = mySmartUpload.getRequest();
以下是Request类，SmartUpload包中应有该类import java.util.Enumeration;
import java.util.Hashtable;public class Request
{ private Hashtable m_parameters;
 private int m_counter; Request()
 {
 m_parameters = new Hashtable();
 m_counter = 0;
 } protected void putParameter(String name, String value)
 {
 if(name == null)
 throw new IllegalArgumentException("The name of an element cannot be null.");
 if(m_parameters.containsKey(name))
 {
 Hashtable values = (Hashtable)m_parameters.get(name);
 values.put(new Integer(values.size()), value);
 } else
 {
 Hashtable values = new Hashtable();
 values.put(new Integer(0), value);
 m_parameters.put(name, values);
 m_counter++;
 }
 } public String getParameter(String name)
 {
 if(name == null)
 throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
 Hashtable values = (Hashtable)m_parameters.get(name);
 if(values == null)
 return null;
 else
 return (String)values.get(new Integer(0));
 } public Enumeration getParameterNames()
 {
 return m_parameters.keys();
 } public String[] getParameterValues(String name)
 {
 if(name == null)
 throw new IllegalArgumentException("Form's name is invalid or does not exist (1305).");
 Hashtable values = (Hashtable)m_parameters.get(name);
 if(values == null)
 return null;
 String strValues[] = new String[values.size()];
 for(int i = 0; i < values.size(); i++)
 strValues[i] = (String)values.get(new Integer(i)); return strValues;
 }
}
也许是版本不同吧，你看看你的SmartUpload类包中是否有类似类定义
按你写的，应import com.jspsmart.upload.*
我已经解决了，加一句：
String title=new String(mySmartUpload.getRequest().getParameter("title").getBytes("GBK"),"ISO8859-1");