添加了文件上传下载的工具类

src/main/java/org/hqu/production_ms/util/DownloadUtil.java

+package org.hqu.production_ms.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.http.HttpServletResponse;
+
+public class DownloadUtil {
+	
+	/**
+	 * @param filePath 要下载的文件路径
+	 * @param returnName 返回的文件名
+	 * @param response HttpServletResponse
+	 * @param delFlag 是否删除文件
+	 */
+	protected void download(String filePath,String returnName,HttpServletResponse response,boolean delFlag){
+		this.prototypeDownload(new File(filePath), returnName, response, delFlag);
+	}
+
+
+	/**
+	 * @param file 要下载的文件
+	 * @param returnName 返回的文件名
+	 * @param response HttpServletResponse
+	 * @param delFlag 是否删除文件
+	 */
+	protected void download(File file,String returnName,HttpServletResponse response,boolean delFlag){
+		this.prototypeDownload(file, returnName, response, delFlag);
+	}
+	
+	/**
+	 * @param file 要下载的文件
+	 * @param returnName 返回的文件名
+	 * @param response HttpServletResponse
+	 * @param delFlag 是否删除文件
+	 */
+	public void prototypeDownload(File file,String returnName,HttpServletResponse response,boolean delFlag){
+		// 下载文件
+		FileInputStream inputStream = null;
+		ServletOutputStream outputStream = null;
+		try {
+			if(!file.exists()) return;
+			response.reset();
+			//设置响应类型	PDF文件为"application/pdf"，WORD文件为："application/msword"， EXCEL文件为："application/vnd.ms-excel"。  
+			response.setContentType("application/octet-stream;charset=utf-8");
+
+			//设置响应的文件名称,并转换成中文编码
+			//returnName = URLEncoder.encode(returnName,"UTF-8");
+			returnName = response.encodeURL(new String(returnName.getBytes(),"iso8859-1"));	//保存的文件名,必须和页面编码一致,否则乱码
+			
+			//attachment作为附件下载；inline客户端机器有安装匹配程序，则直接打开；注意改变配置，清除缓存，否则可能不能看到效果
+			response.addHeader("Content-Disposition",   "attachment;filename="+returnName);  
+			
+			//将文件读入响应流
+			inputStream = new FileInputStream(file);
+			outputStream = response.getOutputStream();
+			int length = 1024;
+			int readLength=0;
+			byte buf[] = new byte[1024];
+			readLength = inputStream.read(buf, 0, length);
+			while (readLength != -1) {
+				outputStream.write(buf, 0, readLength);
+				readLength = inputStream.read(buf, 0, length);
+			}
+		} catch (Exception e) {
+			e.printStackTrace();
+		} finally {
+			try {
+				outputStream.flush();
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+			try {
+				outputStream.close();
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+			try {
+				inputStream.close();
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+			//删除原文件
+			
+			if(delFlag) {				
+				file.delete();
+			}
+		}
+	}
+
+	/**
+	 * by tony 2013-10-17
+	 * @param byteArrayOutputStream 将文件内容写入ByteArrayOutputStream
+	 * @param response HttpServletResponse	写入response
+	 * @param returnName 返回的文件名
+	 */
+	public void download(ByteArrayOutputStream byteArrayOutputStream, HttpServletResponse response, String returnName) throws IOException{
+		response.setContentType("application/octet-stream;charset=utf-8");
+		returnName = response.encodeURL(new String(returnName.getBytes(),"iso8859-1"));			//保存的文件名,必须和页面编码一致,否则乱码
+		response.addHeader("Content-Disposition",   "attachment;filename=" + returnName);  
+		response.setContentLength(byteArrayOutputStream.size());
+		
+		ServletOutputStream outputstream = response.getOutputStream();	//取得输出流
+		byteArrayOutputStream.writeTo(outputstream);					//写到输出流
+		byteArrayOutputStream.close();									//关闭
+		outputstream.flush();											//刷数据
+	}
+}

src/main/java/org/hqu/production_ms/util/FormatStyle.java

+package org.hqu.production_ms.util;
+
+
+public class FormatStyle {
+	
+	public static void main(String[] args) {
+		// TODO: Add your code here
+		FormatStyle formatStyle = new FormatStyle();
+		System.out.println(formatStyle.fileSize("10737418240"));
+	}
+
+
+	public String fileSize(String s1) {
+		int iPos = 0;
+		String s ="";
+		StringBuffer sBuf = new StringBuffer();
+		try{
+			if(s1.trim().compareTo("")==0){
+				return "";
+			}
+			long g = Long.parseLong("1099511627776");//数字太大，JAVA直接写会无法识别，会引起下面比较失败
+			//int i = Integer.parseInt(s1);
+			double i = Double.parseDouble(s1);
+
+			if(i<=0){
+				sBuf.append("");
+			}else if(i<1024){
+				sBuf.append(i).append(" B");	//四舍五入
+				iPos = sBuf.lastIndexOf(".00 B");	
+				if(iPos>0){
+					sBuf.delete(iPos,sBuf.length()-2);	
+				}
+			}else if(i<1024*1024){
+				sBuf.append(new java.text.DecimalFormat(".00").format(i/1024)).append(" KB");	//四舍五入
+				iPos = sBuf.lastIndexOf(".00 KB");	
+				if(iPos>0){
+					sBuf.delete(iPos,sBuf.length()-3);	
+				}
+			}else if(i<1024*1024*1024){
+				sBuf.append(new java.text.DecimalFormat(".00").format(i/(1024*1024))).append(" M");	//四舍五入
+				iPos = sBuf.lastIndexOf(".00 M");
+				if(iPos>0){
+					sBuf.delete(iPos,sBuf.length()-2);	
+				}
+			}else{
+				sBuf.append(new java.text.DecimalFormat(".00").format(i/(1024*1024*1024))).append(" G");	//四舍五入
+				iPos = sBuf.lastIndexOf(".00 G");
+				if(iPos>0){
+					sBuf.delete(iPos,sBuf.length()-2);	
+				}
+			}			
+		}catch(Exception e){
+			return "";
+		}
+		return sBuf.toString();
+	}
+	
+	
+}