怎么在SSH三层框架下实现图片上传

用struts的标签实现，具体你google一下。

我是想到这个大概思路的，但是具体怎么实现还是很模糊！我上了google搜一下，有用common-fileupload实现的但是很多地方不清楚。能具体一点就好了。

类中要有这三个属性
private File upload;
private String uploadContentType;
        private String uploadFileName;
页面
<input name="upload" type="file" class="input_style2" id="upload" size="30" />
处理逻辑：File picFile = new File(this.getRealPath() + "/**");
         if (!picFile.exists()) {
         picFile.mkdirs();
     }
         String fileReName = this.getUploadFileName() + "." + getUploadSuffix(类的实例.getUploadFileName());
         类的实例.getUpload().renameTo(new File(picFile.getPath(), fileReName));

public static String upload(String path, FormFile formFile, String filename) throws Exception {
SimpleDateFormat format=new SimpleDateFormat("yyyyMMddHHmmss");
Date date = new Date();
// 取欲上传的文件的名字和长度
String fname = formFile.getFileName();

String randomStr = Integer.toString((int)(Math.random()*1000));
// 将上传时间加入文件名
int i = fname.indexOf(".");
//String name = String.valueOf(date.getTime());
String name = format.format(date);
String type = fname.substring(i + 1);
if(filename == null || filename.equals("")){
fname = name +"_"+randomStr+ "." + type;
}else{
fname = name +"_"+randomStr +"_" + filename + "." + type;
}

InputStream streamIn = formFile.getInputStream(); // 创建读取用户上传文件的对象
File uploadFile = new File(dir); // 创建把上传数据写到目标文件的对象
if (!uploadFile.exists() || uploadFile == null) { // 判断指定路径是否存在，不存在则创建路径
uploadFile.mkdirs();
}
String path = uploadFile.getPath() + "\\" + fname;
//System.out.println("内 :"+path);
OutputStream streamOut = new FileOutputStream(path);
int bytesRead = 0;
byte[] buffer = new byte[8192];
while ((bytesRead = streamIn.read(buffer, 0, 8192)) != -1) {
streamOut.write(buffer, 0, bytesRead);
}
streamOut.flush();
streamOut.close();
streamIn.close();
formFile.destroy();
return fname;
}

struts2 有专门的上传文件的

你这个把图片的本地路径保存在数据库，显示的时候赋给img的src属性是不可行的！
客户端在不同机器，你能保证他e盘下都有那张图片？感觉lz的思路有偏差！
图片路径你得采用图片保存在服务器上的路径，相对绝对随你，至于图片怎么上传的，网上资料很多

LZ 去看看把
http://www.javaeye.com/wiki/Struts2_leader_guide/1986-struts_guide_10

if (null != this.getPhotoFile()) {
            // 从画面上取得图片文件
            File files = this.getPhotoFile();
            // 文件名 = 文件名 + 日期

            photoFileFileName = new Date().getTime() + photoFileFileName.trim();

            String path = ServletActionContext.getServletContext().getRealPath("/");
            if (!path.endsWith("\\")) {
                path = path + "\\";
            }
            String savePath = path + "\\UploadImages\\";
            // 判断保存用文件夹是否存在
            mkdir(savePath);
         // 保存用的数据流生成
            FileOutputStream fos = null;
            FileInputStream fis = null;
            try {
// 保存用的数据流生成
fos = new FileOutputStream(savePath + photoFileFileName);

System.out.println(savePath + photoFileFileName);

// 保存文件
fis = new FileInputStream(files);
byte[] buffer = new byte[BUFFER_SIZE];
int len = 0;
while ((len = fis.read(buffer)) > 0) {
  fos.write(buffer, 0, len);
}
cond.setPhotoPath(savePath+photoFileFileName);
} catch (FileNotFoundException e) {
addActionError("照片上传失败!");
                cond.setPhotoPath(null);
} catch (IOException e) {
addActionError("照片上传失败!");
                cond.setPhotoPath(null);
}finally {
                try {
                 fos.close();
                    fis.close();
                } catch (IOException e) {
                    addActionError("照片上传失败!");
                    cond.setPhotoPath(null);
                }
            }
          }else{
cond.setPhotoPath(null);
          }

用cos上传组件
下载地址 http://www.servlets.com/cos/index.html
下载链接 http://www.servlets.com/cos/cos-26Dec2008.zip
upload.html<html>
<head>
   <title>upload</title>
   <script type="text/javascript" src="./javascript/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="./javascript/jquery.form.js"></script>
<script type="text/javascript">
$(document).ready(function() {
alert('ok');});
</script>
   <meta http-equiv="Content-Type" content="text/html; charset=GBK">
</head>
<body scroll="no">
   <center>
    <form id="uploadimage" name="uploadimage" method="post"
     action="./upload.jsp?folderName=uploadImage&relativePath=../../"
     >
     <table width=600 border=0 align="center" cellPadding=0 cellSpacing=0
      id="table1" frame="void" style="BORDER-LEFT: #ffffff 0px solid;">
      <input type=hidden id="UploadIsSucces" value="0" />
      <tr bgcolor="#FFFFFF">
       <td width="100" align="center">
        选择图片
       </td>
       <td width="490" colspan="3" rowspan="2">
        <input type="file" name="upimage" id="upimage" size="30">
        <input type="text" name="imgdes" id="imgdes" size="40">
       </td>
      </tr>
      <tr bgcolor="#FFFFFF">
       <td align="center">
        图片描述
       </td>
      </tr>
      <tr>
       <td>
        <input type="submit" id="sub" value="submit" />
        <br />
        <a href="#" id="testJS">testJS</a>
       </td>
      </tr>
     </table>
    </form>
   </center>
</body>
</html>-----------------------------------------------华丽分割线--------------------------------------------------------------------upload.jsp<%@ page contentType="text/html; charset=gbk" language="java" errorPage="" %>
<%@ page language="java" import="java.io.PrintWriter"%>
<%@ page language="java" import="java.io.*"%>
<%@ page language="java" import="java.util.UUID"%>
<%@ page language="java" import="java.util.Enumeration"%>
<%@ page language="java" import="com.oreilly.servlet.MultipartRequest"%>
<%@ page language="java" import="com.oreilly.servlet.multipart.DefaultFileRenamePolicy"%>
<%@ page language="java" import="com.oreilly.servlet.multipart.FileRenamePolicy"%><%
    response.setHeader("Cache-Control", "no-cache");
response.setCharacterEncoding("gbk");
PrintWriter xmlout = response.getWriter();
String uuid = UUID.randomUUID().toString();
//文件的fileURL
String fileURL = "";
// 上传文件名
String fileName = null;
//取得文件描述
String fileDesName = "";
StringBuffer sb = new StringBuffer();
String result = "";try
{
   //得到此源文件的目录
   String realPath = getServletContext().getRealPath("");
   String contentPath = request.getContextPath();
   String requestURL = request.getRequestURL().toString();
   String realURL = requestURL.split(contentPath)[0] + contentPath;
   //上传文件存放的文件夹名称，一律放在根目录下的文件夹里面即folderName/
    String folderName = request.getParameter("folderName");
   //根据不同层级../../的路径不同
   String relativePath = request.getParameter("relativePath");
   //文件的相对路径
   String comparafileName = "";   // 将上传文件存放在saveDirectory
    String saveDirectory = realPath + "/" + folderName;
   System.out.println("saveDirectory= " + saveDirectory);
   File uploadPath = new File(saveDirectory);   if (!uploadPath.exists())
   {
    uploadPath.mkdir();
   }   // 上传文件的大小限制在10 MB
   int maxPostSize = 10 * 1024 * 1024;     //实现将上传文件更名,以防同名覆盖和同时上传两个文件名相同的文件,自动在文件名后面加1（在1~9999范围内）
    FileRenamePolicy policy =(FileRenamePolicy)new DefaultFileRenamePolicy();
   // 上传文件
    MultipartRequest multi = new MultipartRequest(request,saveDirectory, maxPostSize, "GBK",policy);
   StringBuffer filenametemp = new StringBuffer();
    filenametemp.append(uuid);
    //在iidd后面加一下划线"-"以便和文件名称区分出来
    filenametemp.append("-");
   //取得文件描述
    fileDesName = multi.getParameter("imgdes");
    //System.out.println("文件描述:"+ fileDesName);
   // 取得所有上传文件名称
   Enumeration filesname = multi.getFileNames();   while (filesname.hasMoreElements())
   {
    String name = (String) filesname.nextElement();
    //文件上传的完整路径
    File f = multi.getFile(name);
    //文件名称
    fileName = multi.getFilesystemName(name);

    if (fileName != null)
    {
     String oldFilename=fileName;
     int idx=oldFilename.lastIndexOf(".");
     String extention=oldFilename.substring(idx);
     //取文件名
     String newFilename=oldFilename.substring(0,idx);
     //得到不重复的文件名,用iidd加文件名
     String sServerFileName = (String)filenametemp.toString();
     sServerFileName =sServerFileName+newFilename+extention;
     File sServerFile= new File(saveDirectory+"\\" + sServerFileName);
     f.renameTo(sServerFile);
     String FileName = sServerFile.getName();
     //放在上两级目录下（根目录的文件夹下）
     //String comparafileName = "../../" + folderName + "/" + FileName;
     comparafileName = relativePath + folderName + "/" + FileName;
     System.out.print("文件的相对路径:"+comparafileName);
     fileURL = realURL + "/" + folderName + "/" + FileName;

    }
   }   sb.append("<html><body>");
   sb.append("<input id = \"UploadIsSucces\" type=\"hidden\" value=\"1\" />");
   sb.append("图片已经上传成功！");
   sb.append("<br /> 图片描述:");
   sb.append(fileDesName);
   sb.append("<br />图片url:");
   sb.append(fileURL);
   String img = "<br /><img src='" + fileURL + "' />";
   sb.append(img);
   sb.append("</body></html>");
   result = sb.toString();
   //System.out.println(rs);
}
catch(Exception e)
{
     System.out.println("message=" + e.getMessage());
   //Posted content length of 42654262 exceeds limit of 10485760
   String message = e.getMessage();   if(message.indexOf("Posted content length of") !=-1)
   {
    String content = message.split("length of ")[1].split(" exceeds")[0];
    int ct = Integer.parseInt(content);
    String limit = message.split("limit of ")[1];
    int lt = Integer.parseInt(limit);

    result = "对不起,你上传的图片大小为" + ct/(1024*1024) + "MB,超过了最大限制" + lt/(1024*1024) + "MB" ;
   }
   else
   {
    result = "上传失败";
   }   e.printStackTrace();
}
try
{
   xmlout.write(result);
}
catch (Exception e)
{
   e.printStackTrace();
}
finally
{
   xmlout.flush();
   xmlout.close();
}
%>

谢谢大家，我用struts1.2.8解决了。以下是我的方法：
这是action:
FileUpLoadForm fileUpLoadForm = (FileUpLoadForm) form;
System.out.println(fileUpLoadForm.getClass());
FormFile myFile = fileUpLoadForm.getFormFile();
System.out.println("=======" + myFile);
String contentType = myFile.getContentType();
System.out.println(contentType);
String fileName = myFile.getFileName();
System.out.println(fileName); try {
String filePath = getServlet().getServletContext().getRealPath("/")
+ "images";
System.out.println(getServlet());
if (!fileName.equals("")) {
System.out.println(filePath);
File fileToCreate = new File(filePath, fileName);
if (!fileToCreate.exists()) {
FileOutputStream fileOutStream = new FileOutputStream(
fileToCreate);
fileOutStream.write(myFile.getFileData());
fileOutStream.flush();
fileOutStream.close();
}
} } catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
这是Form:
private FormFile formFile;

public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) {

return null;
} /**
* Method reset
* @param mapping
* @param request
*/
public void reset(ActionMapping mapping, HttpServletRequest request) {

} public FormFile getFormFile() {
return formFile;
} public void setFormFile(FormFile formFile) {
this.formFile = formFile;
}
希望着对遇到同样问题的人能有帮助
使用这种方法是struts帮我们做太多事情了。。

请大纳们给讲解用SSH框架开发通过common-fileupload来实现上传下载，谢谢了，如果没有时间，有没有现成的代码了，我自己看就行了，谢谢了！！

这是action:
FileUpLoadForm fileUpLoadForm = (FileUpLoadForm) form;
System.out.println(fileUpLoadForm.getClass());
FormFile myFile = fileUpLoadForm.getFormFile();
System.out.println("=======" + myFile);
String contentType = myFile.getContentType();
System.out.println(contentType);
String fileName = myFile.getFileName();
System.out.println(fileName); try {
String filePath = getServlet().getServletContext().getRealPath("/")
+ "images";
System.out.println(getServlet());
if (!fileName.equals("")) {
System.out.println(filePath);
File fileToCreate = new File(filePath, fileName);
if (!fileToCreate.exists()) {
FileOutputStream fileOutStream = new FileOutputStream(
fileToCreate);
fileOutStream.write(myFile.getFileData());
fileOutStream.flush();
fileOutStream.close();
}
} } catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
这是Form:
private FormFile formFile;
public ActionErrors validate(ActionMapping mapping,
HttpServletRequest request) { return null;
} /**
* Method reset
* @param mapping
* @param request
*/
public void reset(ActionMapping mapping, HttpServletRequest request) { } public FormFile getFormFile() {
return formFile;
} public void setFormFile(FormFile formFile) {
this.formFile = formFile;
}
希望着对遇到同样问题的人能有帮助
使用这种方法是struts帮我们做太多事情了。。
我用这方法怎么不行呢，我只会jsp上传图片，请大家来解决一下，谢谢

我的页面是这样的
<form action="upLoad.do" name="formFile">
  <input type="hidden" value="doUpLoadImg" name="op">
  <input type="file" >
  <input type="submit" value="上传">
  </form>
报错
  class FileUpLoadForm
=======null
2010-2-2 20:24:48 org.apache.struts.action.RequestProcessor processException
警告: Unhandled Exception thrown: class java.lang.NullPointerException
2010-2-2 20:24:48 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet action threw exception
java.lang.NullPointerException
at FileUpLoadAction.doUpLoadImg(FileUpLoadAction.java:25)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)
at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)

能告诉我页面代码是样的吗？

  <form action="upLoad.do"  method ="POST" enctype ="multipart/form-data" >
  <input type="hidden" value="doUpLoadImg" name="op">
  <input type="file" name="formFile" >
  <input type="submit" value="上传">
  </form>
我解决了，但是搞不懂  enctype ="multipart/form-data" 是什么？

哥们，这句得到什么啊String contentType = myFile.getContentType();麻烦指教

package com.huchuhan.img_upload.action;import java.io.File;
import java.util.Date;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;public class UploadsAction extends ActionSupport { private static final long serialVersionUID = 1157141200452916950L; private File[] file;
private String[] fileFileName;
private String[] fileContentType;
private String[] fileName; public String uploads() throws Exception { if (file != null && file.length > 0) {
fileName=new String[file.length];
for (int i = 0; i < file.length; i++) {
// 利用时间戳生成不会重复的文件名
fileName[i] = new Date().getTime()
+this.getExtention(fileFileName[i]);
System.out.println(fileName[i]);
// 设置文件在服务器上的存储路径, 以便读取
File newFile = new File(ServletActionContext
.getServletContext().getRealPath(
File.separator + "UploadImages"
+ File.separator + fileName[i]));
System.out.println(newFile.getAbsolutePath());
// 直接使用struts2提供的文件操作工具类, 将要上传的文件存储到服务器
FileUtils.copyFile(file[i], newFile);
}
}else
{
System.out.println("没有文件");
return INPUT;
} return SUCCESS;
} // 获得文件扩展名
private String getExtention(String fileName) {
int pos = fileName.lastIndexOf(".");
return fileName.substring(pos);
} public File[] getFile() {
return file;
} public void setFile(File[] file) {
this.file = file;
} public String[] getFileFileName() {
return fileFileName;
} public void setFileFileName(String[] fileFileName) {
this.fileFileName = fileFileName;
} public String[] getFileContentType() {
return fileContentType;
} public void setFileContentType(String[] fileContentType) {
this.fileContentType = fileContentType;
} public void setFileName(String[] fileName) {
this.fileName = fileName;
} public String[] getFileName() {
return fileName;
}
}struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd"><struts>
<constant name="struts.multipart.saveDir" value="C:\"></constant>
<package name="struts2" extends="struts-default">
<action name="uploads" class="com.huchuhan.img_upload.action.UploadsAction" method="uploads">
<result name="success">/jsp/shows.jsp</result>
<result name="input" type="redirect">/jsp/uploads.jsp</result>
</action>
</package>
</struts>uploads.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@ include file="/jsp/share/taglib.jsp"  %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Uploads</title>
<script type="text/javascript" src="../js/jquery.js"></script>
<script type="text/javascript">
var i=1;
function addMore()
{
$("#submit").css("display","inline");
var addButton=document.getElementById("add");
addButton.value="add more...";
var table=document.getElementById("table");
if(table.childNodes.length==1)
{
$("#del").css("display", "inline");
}
var tr=document.createElement("tr");
    var td1=document.createElement("td");
    var td2=document.createElement("td");
    var td3=document.createElement("td");
var file=document.createElement("input");
var button=document.createElement("input"); file.type="file";
file.name="file";
button.type="button";
button.value="remove";
button.onclick=function()
{
if(table.childNodes.length==1)
{
addButton.value="add";
$("#del").css("display", "none");
    $("#submit").css("display","none");
}
table.removeChild(tr);
};
td1.innerHTML="file"+i;
td1.align="center";
td2.appendChild(file);
td3.appendChild(button);
td3.align="center";
tr.appendChild(td1);
tr.appendChild(td2);
tr.appendChild(td3);
table.appendChild(tr);
i++;
}
function delAll(o)
{
var table=document.getElementById("table");
//在ie下，对于COL, COLGROUP, FRAMESET, HTML, STYLE, TABLE, TBODY, TFOOT, THEAD, TITLE, TR,innerHTML属性是只读的。
//也就是说你不能通过innerhtml对这些标签进行操作。
//table.innerHTML=""; //ie 不支持, 用以下代码代替.

var childs=table.childNodes;
var length=childs.length;
for(var i=0;i<length;i++)
{
table.removeChild(childs[0]);
}

var addButton=document.getElementById("add");
addButton.value="add";
$("#submit").css("display","none");
$(o).css("display", "none");
}
</script>
</head>
<body>
<s:form action="uploads" method="post" enctype="multipart/form-data" theme="simple">
<table border="0">
<tr>
<td align="center">
<input id="add" type="button" value="add" onclick="addMore()"/>
</td>
<td align="center">
<input id="del" type="button" value="delAll" onclick="delAll(this)" style="display:none; "/>
</td>
</tr>
</table>
<table id="table" border="0"></table>
<input type="submit" id="submit" value="submit" style="display: none;"/>
</s:form>
</body>
</html>shows.jsp<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
    <%@include file="/jsp/share/taglib.jsp" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>show img</title>
</head>
<body>
<c:forEach items="${fileName}" var="v">
<div style="padding: 3px; border: solid 1px #cccccc; text-align:center">
        <img src ="../UploadImages/${v}"/>
        <br/>
    </div>
    </c:forEach>
</body>
</html>web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  <display-name>Img-Upload</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>

调试易

怎么在SSH三层框架下实现图片上传

解决方案 »