Download Tools

  1  @Component
   2  public  class DownLoadUtil {
   3      / ** 
  4       * file download Code
   5       * encoding the coding tell the browser file name, in case there garbled file name when downloading Chinese
   6       * / 
  7      Private  static String encoding = "UTF -8 " ;
   . 8  
  . 9      / ** 
10       * file download
 . 11       * @param Response
 12 is       * @param path filePath file on the server, including the file name
 13 is       * / 
14      public  static  void downloads (the HttpServletResponse Response, String filePath) {
 15         File = File new new File (filePath.toString ());
 16          downloads (Response, File, null , encoding);
 . 17      }
 18 is  
. 19      / ** 
20 is       * Downloads
 21 is       * @param Response
 22 is       * @param filePath on the file server the path, including the file name
 23       * @param fileName file name to download the browser, you do not want to make the file name on the browser to download the same file name and server, set the parameter
 24-       * / 
25      public  static  void download (HttpServletResponse Response, filePath String, String fileName) {
 26 is          File File =new new File (filePath.toString ());
 27          downloads (Response, File, fileName, encoding);
 28      }
 29  
30      / ** 
31 is       * Download
 32       * @param Response
 33 is       * @param path filePath file on the server, including the file name
 34       * @param fileName file name to download the browser, you do not want to make the file name on the browser to download the same file name and server, set the parameter
 35       * @param encoding encoding the file name
 36       * / 
37      public  static  void downloads (the HttpServletResponse Response, filePath String, String fileName, String encoding) {
 38         File file = new File(filePath.toString());
 39         download(response, file, fileName, encoding);
 40     }
 41 
 42     /**
 43      * 文件下载
 44      * @param response
 45      * @param file 文件
 46      */
 47     public static void download(HttpServletResponse response, File file) {
 48         download(response, file, null, encoding);
 49     }
 50 
 51     /**
 52      * Download
 53       * @param the Response
 54       * @param File File
 55       * @param fileName file name to download the browser, you do not want to make the file name on the browser to download the same file name and server, set the parameter
 56       * / 
57 is      public  static  void downloads (the HttpServletResponse Response, file file, String fileName) {
 58          downloads (Response, file, fileName, encoding);
 59      }
 60  
61 is      / ** 
62 is       * Downloads
 63 is       * @param Response
 64       * @param file file
65       * @param fileName file name to download the browser, you do not want to make the file name on the browser to download the same file name and server, set the parameter
 66       * @param encoding encoding the file name
 67       * / 
68      public  static  void download (the HttpServletResponse Response, File File, fileName String, String encoding) {
 69          IF (File == null || File.Exists () ||! file.isDirectory ()) {
 70              return ;
 71 is          }
 72  
73 is          // if not specified Download the file to the name of the browser, the default file name is used 
74          IF (StringUtils.isBlank (fileName)) {
 75              fileName =file.getName ();
 76          }
 77  
78          the try {
 79              the InputStream IS = new new the FileInputStream (File);
 80              downloads (Response, IS, fileName, encoding);
 81          } the catch (IOException E) {
 82              e.printStackTrace ();
 83          }
 84      }
 85  
86      / * 
87       * documents
 88       * @param Response
 89       * @param IS file input stream
 90       * @paramfileName the downloaded file name
 91 is       * @throws IOException
 92       * / 
93      public  static  void downloads (the HttpServletResponse Response, the InputStream IS, String fileName) {
 94          downloads (Response, IS, fileName, encoding);
 95      }
 96  
97      / ** 
98       * Download
 99       * @param Response
 100       * @param iS file input stream
 101       * @param file name fileName downloaded
 102       * @param encoding encoding format
 103      */
104     public static void download(HttpServletResponse response, InputStream is, String fileName, String encoding){
105         if(is == null || StringUtils.isBlank(fileName)){
106             return;
107         }
108 
109         BufferedInputStream bis = null;
110         OutputStream os = null;
111         BufferedOutputStream bos = null;
112 
113         try{
114             bis = new BufferedInputStream(is);
115             os = response.getOutputStream();
116             bos = new BufferedOutputStream(os);
117             response.setContentType("application/octet-stream;charset=" + encoding);
118             response.setCharacterEncoding(encoding);
119             response.setHeader("Content-disposition", "attachment;filename="+ URLEncoder.encode(fileName, encoding));
120             byte[] buffer = new byte[1024];
121             int len = bis.read(buffer);
122             while(len != -1){
123                 bos.write(buffer, 0, len);
124                 len = bis.read(buffer);
125             }
126 
127             bos.flush();
128         }catch(IOException e){
129             e.printStackTrace();
130         }finally{
131             if(bis != null){
132                 try{
133                     bis.close();
134                 }catch(IOException e){}
135             }
136 
137             if(is != null){
138                 try{
139                     is.close();
140                 }catch(IOException e){}
141             }
142         }
143     }
144 
145     public static String getEncoding() {
146         return encoding;
147     }
148 
149     public static void setEncoding(String encoding) {
150         DownLoadUtil.encoding = encoding;
151     }
152 }