论坛首页 → Java企业应用论坛 →

struts2 上传图片改变原始图片名称的方法！

浏览 8027 次
锁定老帖子 主题：struts2 上传图片改变原始图片名称的方法！
精华帖 (0) :: 良好帖 (0) :: 新手帖 (2) :: 隐藏帖 (0)
作者 正文
  • coolworm
  • 等级: 初级会员
  • 性别:
  • 文章: 11
  • 积分: 80
  • 来自: 北京
   发表时间：2008-11-19   最后修改：2008-11-19
  研究了2天，终于利用STRUTS2 自带的唯一不重名的方法 实现了修改上传文件名的方法。现在和大家分享一下~~！
   首先加入相应的JAR 包，我就不用多说了吧！
先从WEB.xml 配置开始说吧： 
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  <filter>
  <filter-name>struts2</filter-name>
  <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
  
  </filter>
  <filter-mapping>
  <filter-name>struts2</filter-name>
  <url-pattern>/*</url-pattern>
  </filter-mapping>
</web-app>


2， struts.xml的配置： 
<?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.objectFactory" value="spring"/>-->
<constant name="struts.i18n.encoding" value="GBK"/>

<package name="upload1" extends="struts-default">
  <action name="upload" class="org.example.action.Upload" method="upload" >
  		<interceptor-ref name="fileUpload">
        <param name ="allowedTypes"> 
                    image/bmp,image/PNG,image/gif,image/JPEG,image/jpg,image/pjpeg
                </param> 
                <param name="maximumSize">
					102400000
				</param>
         </interceptor-ref>
         <interceptor-ref name="defaultStack"/>
           <param name="savePath">/photo</param>
      	 <result name="success" >success.jsp</result>
      	 <result name="input"> /index.jsp</result> 
      	 
  		</action>
</package>
</struts>


下面是Upload.java 
package org.example.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class Upload extends ActionSupport {

	/**
	 * 
	 */
	
	private static final long serialVersionUID = -8204063374280945416L;

	
	private File upload;
	private String uploadFileName;
	private String uploadContentType;
	private String savePath;
	public File getUpload() {
		return upload;
	}
	public void setUpload(File upload) {
		this.upload = upload;
	}
	
	public String getUploadContentType() {
		return uploadContentType;
	}
	public void setUploadContentType(String uploadContentType) {
		this.uploadContentType = uploadContentType;
	}
	public String getSavePath() {
	      return ServletActionContext.getRequest().getRealPath(savePath);
	}
	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}

	
	public String upload() throws Exception
	{
		//得到上传文件的后缀名
		String b=getUploadContentType();
		String houzhui=b.substring(b.indexOf("/")+1, b.length());
		houzhui=(houzhui.equals("pjpeg")?"jpg":houzhui);
		
		//得到文件的新名字
		
		String a = upload.getName();
	    String mingzi= a.substring( 0, a.length()-3 ) + houzhui; 
		
		 // 创建文件
	  FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + mingzi);
	  FileInputStream fis = new FileInputStream(getUpload());
	  byte[] buffer = new byte[1024];
	  int len = 0;
	  while ((len = fis.read(buffer)) > 0)
	  {
		fos.write(buffer , 0 , len);
	 }
    return SUCCESS;
}
	public String getUploadFileName() {
		return uploadFileName;
	}
	public void setUploadFileName(String uploadFileName) {
		this.uploadFileName = uploadFileName;
	}
}


3,下面是index.jsp文件的源码 
<%@ page language="java"  pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
 
    
    <title>My JSP 'index.jsp' starting page</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">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  	<s:fielderror></s:fielderror>
  <s:form method="post" action="upload" enctype="multipart/form-data">
  <s:textfield name="title" label="title"></s:textfield>
  <s:file name="upload" label="file"></s:file>
  <s:submit></s:submit>
  </s:form>
  <body>

  </body>
</html>



备注：
   也可以通过调用JS 的方法先得到要上传文件的后缀名，这种方法，大家自由发挥吧，想研究的朋友请联系我，QQ：296502215




返回顶楼
         
  • coolworm
  • 等级: 初级会员
  • 性别:
  • 文章: 11
  • 积分: 80
  • 来自: 北京
   发表时间：2008-11-19  
  下面用调JS 的方法得到上传的后缀名：
1, 以下是 index.jsp 的代码， 在顶部加了 JS代码。 
<%@ page language="java"  pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
<script>  
function ty(){
var srcc = document.form.upload.value;
srcc = srcc.toString()
start = srcc.indexOf(".");
end = srcc.length;
ts=srcc.substring(start+1,end);
nts=ts.toLowerCase();
document.form.houzhui.value=nts;

}
</script>

    
    <title>My JSP 'index.jsp' starting page</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">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  	<s:fielderror></s:fielderror>
  <s:form method="post" action="upload" enctype="multipart/form-data" onsubmit="return ty();" name="form" >
  <s:textfield name="title" label="title"></s:textfield>
  <s:file name="upload" label="file"></s:file>
  <s:hidden name="houzhui"></s:hidden>
  <s:submit></s:submit>
  </s:form>
  <body>

  </body>
</html>


2,下面是action 的代码 

package org.example.action;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class FileUpload extends ActionSupport {

	/**
	 * 
	 */
	
	private static final long serialVersionUID = -8204063374280945416L;

	
	private File upload;
	private String uploadFileName;
	private String uploadContentType;
	private String savePath;
	private String houzhui;
	public String getHouzhui() {
		return houzhui;
	}
	public void setHouzhui(String houzhui) {
		this.houzhui = houzhui;
	}
	public File getUpload() {
		return upload;
	}
	public void setUpload(File upload) {
		this.upload = upload;
	}
	
	public String getUploadContentType() {
		return uploadContentType;
	}
	public void setUploadContentType(String uploadContentType) {
		this.uploadContentType = uploadContentType;
	}
	public String getSavePath() {
	      return ServletActionContext.getRequest().getRealPath(savePath);
	}
	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}

	
	public String upload() throws Exception
	{
		//得到随机的新文件名
		String a=upload.getName();
		String b=a.substring(0, a.length()-3);
		//新文件名+得到的后缀
		String mingzi=b+ getHouzhui();
		
	  FileOutputStream fos = new FileOutputStream(getSavePath() + "\\" + mingzi);
	  FileInputStream fis = new FileInputStream(getUpload());
	  byte[] buffer = new byte[1024];
	  int len = 0;
	  while ((len = fis.read(buffer)) > 0)
	  {
		fos.write(buffer , 0 , len);
	 }
    return SUCCESS;
}
	public String getUploadFileName() {
		return uploadFileName;
	}
	public void setUploadFileName(String uploadFileName) {
		this.uploadFileName = uploadFileName;
	}
}


备注，其他的配置和 上边的文章的配置一样，比如:web.xml, struts.xml等
返回顶楼
          回帖地址
0 请登录后投票
  • glagra
  • 等级: 初级会员
  • 性别:
  • 文章: 7
  • 积分: 50
  • 来自: 吉安
   发表时间：2009-03-22  
为什么一定要把当前时间加在后辍名前呢．．不能直接加在名字最前面吗？？
返回顶楼
          回帖地址
0 请登录后投票
论坛首页 → Java企业应用版

跳转论坛:
Global site tag (gtag.js) - Google Analytics