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java 文件打包下载

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
/**
 * 报告管理--- 需要上传的文件
 * @author lyq
 *
 */
@Controller
@RequestMapping("/files")
public class FilesController {
	
	
	
	
	/**
	 * 下载 报告资料(这个需要打包下载所有的 所以单独列出来)
	 * 这个路径还没有改动
	 * @param request
	 * @param response
	 * @param reportId
	 * @return
	 * @throws IOException
	 */
	@RequestMapping(value="/downReport")
	public String downReport(HttpServletRequest request,HttpServletResponse response) throws IOException{
	    
		
	
		    String tmpFileName = "ceshi.zip";  
	        byte[] buffer = new byte[1024];  
		   
	        String strZipPath ="D://"+tmpFileName;
 
	        try {  
	            ZipOutputStream out = new ZipOutputStream(new FileOutputStream(  
	                    strZipPath));  
	            // 需要同时下载的两个文件a.txt ,b.txt  
	            String []filePath={"D://conf.xml","D://login.htm"};
	            File[] file1 =new File[filePath.length] ;
	            for(int i=0;i<filePath.length;i++){
	            	file1[i]=new File(filePath[i]);
	            }
	           
	            
	            for (int i = 0; i < file1.length; i++) {  
	                FileInputStream fis = new FileInputStream(file1[i]);  
	                out.putNextEntry(new ZipEntry(file1[i].getName()));  
	                //设置压缩文件内的字符编码,不然会变成乱码  
	                out.setEncoding("GBK");  
	                int len;  
	                // 读入需要下载的文件的内容,打包到zip文件  
	                while ((len = fis.read(buffer)) > 0) {  
	                    out.write(buffer, 0, len);  
	                }  
	                out.closeEntry();  
	                fis.close();  
	            }  
	            out.close();  
	            this.downloadFile(strZipPath,response);  
	        } catch (Exception e) {  
	         e.printStackTrace();
	        }  
	        return null;  
	}
	
	
	
    public void downloadFile(String fileName,HttpServletResponse response){  
        response.setCharacterEncoding("utf-8");  
        response.setContentType("multipart/form-data");  
  
        response.setHeader("Content-Disposition", "attachment;fileName=report.zip");  
        try {  
            File file=new File(fileName);  
            System.out.println(file.getAbsolutePath());  
            InputStream inputStream=new FileInputStream(file);  
            OutputStream os=response.getOutputStream();  
            byte[] b=new byte[1024];  
            int length;  
            while((length=inputStream.read(b))>0){  
                os.write(b,0,length);  
            }  
            inputStream.close();  
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
	
	

}

 

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