单文件上传

单文件上传笔记

一、文件上传工具类(获取文件.后缀、设置文件名称、保存文件)

 

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.GregorianCalendar;
import java.util.Random;

import org.apache.commons.io.FileUtils;

public class UpDownLoadFile 
{
	public  String saveFile(File file,String fileName,String fileContenType,String realPath) throws IOException
	{
		String realFileName=getFileName(fileName);
		
		/*System.out.println("realpath: "+realPath);
		System.out.println("fileContenType: "+fileContenType);
		System.out.println("fileName: "+realFileName);*/
		if(file!=null)
		{
			File saveFile=new File(new File(realPath),realFileName);
			 if (!saveFile.getParentFile().exists())
				 saveFile.getParentFile().mkdirs();
	            FileUtils.copyFile(file, saveFile);//struts2自带文件工具类
		}
		return realFileName;
	}
	
	public  String getFileName(String fileName)
	{
		String result="";
		GregorianCalendar cal=new GregorianCalendar();
		SimpleDateFormat  formatDate=new SimpleDateFormat("yyyyMMddHHmmss");
		String strDate=formatDate.format(cal.getTime());//获取日期
		
		//随机数代码
		Random random = new Random();
		StringBuilder strBuilder=new StringBuilder();
		String temp="";
		for(int i=0;i<4;i++)
		{
			temp=String.valueOf(random.nextInt(10));
			strBuilder.append(temp);//获取随机数
		}
		
		//获取.后缀代码
		int dot=fileName.lastIndexOf(".");
		String extName=fileName.substring(dot);//获取.后缀
		result=strDate+strBuilder+extName;
		return result;
	}
	
}

 

 

二、web页面

 

<form name="upload" id="upload" action="<%=basePath %>ssj/upLoad.action" 
          method="post"  enctype="multipart/form-data" onsubmit="return submitForm()">
                <input type="hidden" name="user.userid" value="${user.userid}"/>           
                <input type="file" name="file" id="file"/>(文件大小不超过100k)<input type="submit" id="upButton"  value="上传"/><input type="reset" value="取消"/> 
 </form>

 

 三、action配置文件

 

<package name="ssj" namespace="/ssj" extends="struts-default">
	   <action name="upLoad" class="com.xinfeijinxin.qy.action.PersonalAction"
			method="upFile">
			<interceptor-ref name="fileUpload" >
             <!-- 配置允许上传的文件类型 -->
                 <param name="allowedTypes">image/bmp,image/png,image/gif,image/jpeg,image/jpg,
                   image/pjpeg,image/x-png</param>
   			 <!-- 配置允许上传的文件大小100kb -->
                 <param name="maximumSize">102400</param>
           </interceptor-ref>
			<interceptor-ref name="defaultStack" />
			<result >/Personal/Personal_load.jsp</result>
			<result name="input">/Personal/Personal_upDownResult.jsp</result>
		</action>
</package>

 

四、文件上传业务代码

 

public class PersonalAction  {
        private File file;//上传文件
	private String fileFileName;//上传文件名称
	private String fileContentType;//上传文件类型


public String upFile()
	{
          //路径设置
	    String savePath = ServletActionContext.getServletContext().getRealPath("/images/head");
			UpDownLoadFile upFileUtil=new UpDownLoadFile();
			String txPath=upFileUtil.saveFile(file, fileFileName, fileContentType, savePath);
			
		return SUCCESS;
	}
}