今天写的struts上传图片的类！简单

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今天写的struts上传图片的类！简单

调用的地方

<a onClick="javascript:window.open('jsp/uploadphoto.jsp','myfacewindow', 'height=100,width=440, top=350, left=400, toolbar=no, menubar=no, scrollbars=no, resizable=no,location=no, status=no');" style="cursor:hand;"><span class="STYLE2">上传</span></a> 推荐最佳比例为:(50px*50px)

下面是上传的界面    uploadphoto.jsp

<%@page contentType="text/html; charset=GBK" import="java.util.HashMap"%>
<style type="text/css">

</style>
<html>
<title>上传图片</title>
<body> <br/>
 <span class="STYLE2">商务客图片上传</span><br/>
 <span class="STYLE1">请您选择您要上传的图片，图片推荐：50像素*50像素！使用.jpg .gif .bmp格式</span>
<table width="100%" border="0" cellspacing="0" cellpadding="0">
<form id="uploadphoto_f" name="uploadphoto_f" enctype="multipart/form-data" method="post" action="../uploadphoto.do">
<tr>
    <td height="41">
<input name="flag" type="hidden" value="myface" />
<input name="loadpathto" type="hidden" value="/uploadcard/myface/" />
 <input name="uploadphoto" type="file" id="uploadphoto" size="40" />
<input name="upload_b" type="submit" id="upload_b" value=" 上传 " /></td>
</tr></form>
</table>
</body>
</html>
<%String msg=request.getAttribute("msg")==null?"":request.getAttribute("msg")+"";
if(!msg.equals("")){
%>
<script>
opener.document.location.href="Userinfo.do";
window.close();
</script>

<%}%>

接着是FORM 类       uploadphotoForm

package com.onlysoft.txl.user;

/**
* <p>Title: </p>
*
* <p>Description: </p>
*
* <p>Copyright: Copyright (c) 2006</p>
*
* <p>Company: fishsoft</p>
*
* @author Danny
* @version 1.0
*/
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;
import org.apache.struts.upload.MultipartRequestHandler;

public class uploadphotoForm extends ActionForm {
protected FormFile uploadphoto;
public FormFile getUploadphoto() {
     return uploadphoto;
}

public void setUploadphoto(FormFile theFile) {
     this.uploadphoto = theFile;
}

public ActionErrors validate(
     ActionMapping mapping,
     HttpServletRequest request) {
   ActionErrors errors = null;
   //has the maximum length been exceeded?
   Boolean maxLengthExceeded =
       (Boolean) request.getAttribute(
           MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);

   if ( (maxLengthExceeded != null) && (maxLengthExceeded.booleanValue())) {
     errors = new ActionErrors();
     errors.add(
         ActionMessages.GLOBAL_MESSAGE,
         new ActionMessage("maxLengthExceeded"));
   }
   return errors;
}

}

这个是action类     uploadphotoAction

  1package com.onlysoft.txl.user;
  2
  3/** *//**
  4 * <p>Title: </p>
  5 *
  6 * <p>Description: </p>
  7 *
  8 * <p>Copyright: Copyright (c) 2006</p>
  9 *
10 * <p>Company: fishsoft</p>
11 *
12 * @author Danny
13 * @version 1.0
14 */
15import javax.servlet.http.HttpServletRequest;
16import javax.servlet.http.HttpServletResponse;
17import org.apache.struts.action.ActionForm;
18import org.apache.struts.action.ActionMapping;
19import org.apache.struts.action.ActionForward;
20
21import com.onlysoft.txl.*;
22import java.sql.ResultSet;
23import java.util.Map;
24import java.util.HashMap;
25import java.util.ArrayList;
26import java.util.List;
27import com.onlysoft.txl.mail.client.SenderMail;
28import org.apache.struts.Globals;
29import org.apache.struts.action.ActionMessage;
30import org.apache.struts.action.ActionMessages;
31import org.apache.struts.upload.FormFile;
32import java.io.InputStream;
33import java.io.ByteArrayOutputStream;
34import javax.servlet.http.HttpSession;
35import java.io.FileOutputStream;
36import java.io.OutputStream;
37
38public class uploadphotoAction extends BaseAction{
39  public ActionForward execute(
40        ActionMapping mapping,
41        ActionForm form,
42        HttpServletRequest request,
43        HttpServletResponse response) throws Exception {
44   init(request);
45   if (!isLogin) {
46        return mapping.findForward("relogin");
47        }
48   String flag = request.getParameter("flag");
49   String loadpathto = request.getParameter("loadpathto");
50   String filePath = request.getRealPath("/"); //取当前系统路径
51   String pathphoto = loadpathto;
52
53
54   if (form instanceof uploadphotoForm) {//如果form是uploadsForm
55     String encoding = request.getCharacterEncoding();
56     if ((encoding != null) && (encoding.equalsIgnoreCase("utf-8")))
57        {
58            response.setContentType("text/html; charset=GBK");//如果没有指定编码，编码格式为GBk
59        }
60    uploadphotoForm theForm = (uploadphotoForm ) form;
61    FormFile file = theForm.getUploadphoto();//取得上传的文件
62    try {
63      InputStream stream = file.getInputStream(); //把文件读入
64
65      ByteArrayOutputStream baos = new ByteArrayOutputStream();
66
67      if (file.getFileSize() > (200 * 1024)) {
68        request.setAttribute("message", "文件请控制在200K以下！");
69        return mapping.findForward("ErrorInfo");
70      }
71      String contentType = file.getContentType();
72      System.out.println("文件类别：=" + contentType);
73      String filebackstr = "";
74      if (contentType.equals("image/pjpeg")) {
75        filebackstr = ".jpg";
76      } else if (contentType.equals("image/gif")) {
77        filebackstr = ".gif";
78      } else if (contentType.equals("image/bmp")) {
79        filebackstr = ".bmp";
80      } else {
81        request.setAttribute("message", "文件格式不正确！");
82        return mapping.findForward("ErrorInfo");
83      }
84      OutputStream bos = new FileOutputStream(filePath + pathphoto +
85                                              userid + file.getFileName()); //建立一个上传文件的输出流
86      int bytesRead = 0;
87      byte[] buffer = new byte[8192];
88      while ( (bytesRead = stream.read(buffer, 0, 8192)) != -1) {
89        bos.write(buffer, 0, bytesRead); //将文件写入服务器
90      }
91      bos.close();
92      stream.close();
93    }
94    catch(Exception e){
95     System.err.print(e);
96    }
97     String sql="update sync4j_user set MYFACEPATH='" +pathphoto.replaceFirst("/","") +userid+file.getFileName()+"' where userid="+userid;
98    db.doSql(sql, db.DELETE_MODE, conn);
99
100   }else{
101        request.setAttribute("message", "上传有误");
102        return mapping.findForward("ErrorInfo");
103   }
104
105
106
107   request.setAttribute("msg", "上传成功");
108   return mapping.findForward("loadok");
109
110  }
111}
112

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原文地址：https://www.cnblogs.com/QDuck/p/410701.html