text/html與text/plain有什么區別？

 MIME是服務器通知客戶機傳送文件是什么類型的主要方法，客戶機瀏覽器也通過MIME告訴服務器它的參數。

     在網上，如果接收到的文件沒有MIME頭，就默認它為HTML格式。但這樣也不好，因為當MIME的包頭是text/plain時，瀏覽器將直接顯示而不關心它的什么字體，顏色之類的參數

 

response.setContentType() 的作用是使客戶端瀏覽器，區分不同種類的數據，並根據不同的MIME調用瀏覽器內不同的程序嵌入模塊來處理相應的數據

 

case "doc": ContentType = "application/msword"; bre

case "doc":
                    ContentType = "application/msword";
                    break;
                case "pdf":
                    ContentType = "application/pdf";
                    break;
                case "jpg":
                case "jpeg":
                    ContentType = "image/jpeg";
                    break;
                case "gif":
                    ContentType = "image/gif";
                    break;          
                case "zip":
                    ContentType = "application/zip";
                    break;
                case "txt":
                    ContentType = "text/plain";
                    break;
                case "htm":
                case "html":
                    ContentType = "text/html";
                    break;             
                case "xls":
                    ContentType = "application/vnd.ms-excel";
                    break;
                case "ppt":
                    ContentType = "application/vnd.ms-powerpoint";
                    break;
                default:
                    ContentType = "application/octet-stream";
                    break;

意思是八進制文件更新，是火狐的更新文件.