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非常郁闷action接收form出错各位请来看看

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非常郁闷action接收form出错各位请来看看

发表于：2008-01-16 11:54:32 楼主

2008-1-16 11:42:20 org.apache.struts.action.requestprocessor processexception
警告: unhandled exception thrown: class java.lang.nullpointerexception
2008-1-16 11:42:20 org.apache.catalina.core.standardwrappervalve invoke
严重: servlet.service（) for servlet action threw exception
java.lang.nullpointerexception
at com.struts.action.uploadfileaction.ＥＸＥＣute（uploadfileaction.java:73)
at org.apache.struts.action.requestprocessor.processactionperform（requestprocessor.java:419)
at org.apache.struts.action.requestprocessor.process（requestprocessor.java:224)
at org.apache.struts.action.actionservlet.process（actionservlet.java:1194)
at org.apache.struts.action.actionservlet.dopost（actionservlet.java:432)
at javax.servlet.http.httpservlet.service（httpservlet.java:710)
at javax.servlet.http.httpservlet.service（httpservlet.java:803)
at org.apache.catalina.core.applicationfilterchain.internaldofilter（applicationfilterchain.java:269)
at org.apache.catalina.core.applicationfilterchain.dofilter（applicationfilterchain.java:188)
at org.apache.catalina.core.standardwrappervalve.invoke（standardwrappervalve.java:213)
at org.apache.catalina.core.standardcontextvalve.invoke（standardcontextvalve.java:174)
at org.apache.catalina.core.standardhostvalve.invoke（standardhostvalve.java:127)
at org.apache.catalina.valves.errorreportvalve.invoke（errorreportvalve.java:117)
at org.apache.catalina.core.standardenginevalve.invoke（standardenginevalve.java:108)
at org.apache.catalina.connector.coyoteadapter.service（coyoteadapter.java:151)
at org.apache.coyote.http11.http11aprprocessor.process（http11aprprocessor.java:834)
at org.apache.coyote.http11.http11aprprotocol$http11connectionhandler.process（http11aprprotocol.java:640)
at org.apache.tomcat.util.net.aprendpoint$worker.run（aprendpoint.java:1286)
at java.lang.thread.run（unknown source)

发表于：2008-01-16 11:55:161楼得分:0

jsp页面

<%@ page language="java" contenttype="text/html; charset=gb2312"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%>
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles"%>

<!doctype html public "-//w3c//dtd html 4.01 transitional//en">
<html>
<head>
<title> uploadfiles.jsp </title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">


</head>

<body>
<form action="uploadfile.do?action=addfile"enctype="multipart/form-data" method="post">
<table align="center" width="200px">
<tr>
<td nowrap="nowrap">
文件名：
</td>
<td>
<input type="file" name="filename" />
</td>
</tr>
<tr>
<td nowrap="nowrap">
备注
</td>
<td>
<input type="textarea" name="memo" />
</td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" name="submit" value="增加资料"/>
</td>
</tr>
</table>
</form>
</body>
</html>

发表于：2008-01-16 11:55:332楼得分:0

form

/*
* generated by myeclipse struts
* template path: templates/java/javaclass.vtl
*/
package com.struts.form;

import javax.servlet.http.httpservletrequest;

import org.apache.struts.action.actionerrors;
import org.apache.struts.action.actionform;
import org.apache.struts.action.actionmapping;
import org.apache.struts.upload.formfile;
import org.apache.struts.upload.multipartrequesthandler;

/**
* myeclipse struts creation date: 01-16-2008
*
* xdoclet definition:
*
* @struts.form name="uploadfileform"
*/
public class uploadfileform extends actionform {

private string memo;

private formfile filename = null;

public formfile getfilename（) {
return filename;
}

public void setfilename（formfile filename) {
this.filename = filename;
}

public string getmemo（) {
return memo;
}

public void setmemo（string memo) {
this.memo = memo;
}

public actionerrors validate（actionmapping mapping,
httpservletrequest request) {
actionerrors errors = new actionerrors（);
if（filename==null){
system.out.println（"filename为null");
}
return errors;
}

public void reset（actionmapping mapping, httpservletrequest request) {
// todo auto-generated method stub
}
}

发表于：2008-01-16 11:55:533楼得分:0

/*
* generated by myeclipse struts
* template path: templates/java/javaclass.vtl
*/
package com.struts.action;

import java.io.file;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.inputstream;
import java.io.outputstream;
import java.io.printwriter;
import java.sql.connection;
import java.sql.sqlexception;
import java.text.simpledateformat;
import java.util.date;

import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletresponse;
import javax.servlet.http.httpsession;
import javax.sql.datasource;

import org.apache.struts.action.action;
import org.apache.struts.action.actionform;
import org.apache.struts.action.actionforward;
import org.apache.struts.action.actionmapping;
import org.apache.struts.action.actionmessage;
import org.apache.struts.action.actionmessages;
import org.apache.struts.upload.formfile;
import com.struts.form.uploadfileform;

import com.struts.dao.filedao;

/**
* myeclipse struts creation date: 01-16-2008
*
* xdoclet definition:
*
* @struts.action path="/uploadfile" name="uploadfileform" input="/seeload.jsp"
* scope="request" validate="true"
*/
public class uploadfileaction extends action {
/*
* generated methods
*/

/**
* method ＥＸＥＣute
*
* @param mapping
* @param form
* @param request
* @param response
* @return actionforward
*/
public actionforward ＥＸＥＣute（actionmapping mapping, actionform form,
httpservletrequest request, httpservletresponse response) {
string encoding = request.getcharacterencoding（);
if（（encoding != null)&&（encoding.equalsignorecase（"utf-8"))){
response.setcontenttype（"text/html;charset=gb2312");// 如果没有指定编码，编码格式为gb2312
}

uploadfileform uploadfileform = （uploadfileform) form;
formfile filename = uploadfileform.getfilename（);
string memo = uploadfileform.getmemo（);

datasource ds = null;
connection conn = null;
httpsession session = null;

try{
ds = getdatasource（request,"a");
conn = ds.getconnection（);

filedao sqldao = new filedao（conn);

string action = request.getparameter（"action");
actionmessages errors = new actionmessages（);

// 增加文件
if（action.equals（"addfile")){
// 传递文件
if（filename.getfilename（).trim（).length（)> 0){
// 取得上传时间
simpledateformat dateformat1 = new simpledateformat（"yyy-mm-dd");
date dt = new date（);
string uptime = dateformat1.format（dt);

string tempname="";

try{
// 开始上传文件
string filepath = this.getservlet（).getservletcontext（).getrealpath（"/");// 取得当前路径
inputstream stream = filename.getinputstream（);// 把文件读入

// 建立一个上传文件的输入流如果是linux系统请把"\"换成"/"

system.out.println（filename.getfilename（));

int position = filename.getfilename（).indexof（".");
string type = filename.getfilename（).substring（position);

string fileid = sqldao.getmaxfileid（);

tempname = fileid + type;

outputstream bos = new fileoutputstream（filepath + "upfiles"+"'\'" + tempname);

int bytesread = 0;
byte[] buffer = new byte[8192];
while（（bytesread = stream.read（buffer,0,8192)) != -1){
bos.write（buffer,0,bytesread);
}
bos.close（);
stream.close（);
// 上传文件完成
}catch（exception e){
errors.add（actionmessages.global_message , new actionmessage（"file.add.failure")) ;
if （ !errors.isempty（)){
saveerrors（request, errors) ;
}
return new actionforward（mapping.getinput（));
}
//写入到数据库记录
if（!sqldao.insernew（tempname, filename.getfilename（), memo, uptime)){
errors.add（actionmessages.global_message,new actionmessage（"file.add.failure"));
if（!errors.isempty（)){
saveerrors（request,errors);
}
return new actionforward（mapping.getinput（));
}
removeformbean（mapping,request);
return new actionforward（mapping.getinput（));
}
}
}catch（sqlexception e){
e.printstacktrace（);
}finally{
try{
if（conn != null){
conn.close（);
}
}catch（sqlexception e){
e.printstacktrace（);
}
}
return null;

}

protected void removeformbean（actionmapping mapping,
httpservletrequest request) {
if （mapping.getattribute（) != null)
if （"request".equals（mapping.getscope（))) {
request.removeattribute（mapping.getattribute（));
} else {
httpsession session = request.getsession（);
session.removeattribute（mapping.getattribute（));
}
}

}

发表于：2008-01-16 11:56:354楼得分:0

struts-comfig

<?xml version="1.0" encoding="utf-8"?>
<!doctype struts-config public "-//apache software foundation//dtd struts configuration 1.2//en" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
<data-sources />
<form-beans >
<form-bean name="uploadfileform" type="com.struts.form.uploadfileform" />

</form-beans>

<global-exceptions />
<global-forwards />
<action-mappings >
<action
attribute="uploadfileform"
input="/uploadfiles.jsp"
name="uploadfileform"
path="/uploadfile"
scope="request"
type="com.struts.action.uploadfileaction" >
<forward name="listfiles" path="/seeload.jsp" />
</action>

</action-mappings>

<message-resources parameter="com.struts.applicationresources" />
</struts-config>

发表于：2008-01-17 22:05:495楼得分:0

<form action="/uploadfile.do?action=addfile"enctype="multipart/form-data" method="post">

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您的位置：程序门 -> java -> 框架、开源

非常郁闷action接收form出错 各位请来看看

非常郁闷action接收form出错各位请来看看