SSH Summary (II)

1. File Operations, read and write, and solve the garbled Problem

Read files

InputStreamReader isr = new InputStreamReader(new FileInputStream(new File(path)), "UTF-8");BufferedReader reader = new BufferedReader(isr);String s;while ((s = reader.readLine()) != null) {content += s + "\n";}reader.close();

Write files

Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(newFile1.getAbsolutePath().toString()), "UTF-8"));writer.write(content);writer.close();

2. Common struts2 labels

Ticket: <s: Radio name = "gender" list = "# {'male': 'male', 'female ': female} "listkey =" key "listvalue =" value "value =" 'male' "/>

Time Format: <s: Date name = "publishtime" format = "YYYY mm dd hh: mm: SS"/>

Drop-down box: <s: select list = "# request. role "name =" role1 "value =" rolename "Key =" ID "headerkey =" 0 "headervalue =" select role "> </S: Select>

3. upload files through Ajax

Ajax uses the ajaxfileupload. js plug-in to upload files. The Ajax code is as follows:

HTML code:

<Input id = "filetoupload" type = "file" size = "20" name = "myfile" class = "input"> <button type = "button" id = "buttonupload" data-dismiss = "Modal" class = "BTN-primary"> upload </button>

JS Code:

 

$ ("# Buttonupload "). click (function () {// verify the image format var format = $ ("# filetoupload "). val (); var type = format. substring (format. lastindexof (". ") + 1, format. length ). tolowercase (); onsole.info (format); console.info (type); If (type! = "Jpg" & type! = "Jpeg" & type! = "BMP" & type! = "GIF" & type! = "PNG") {alert ("please upload the correct image format"); Return ;}$. ajaxfileupload ({URL: 'notice _ addimage. action ', // processing image script ecureuri: false, fileelementid: 'filetupload', // file control iddatatype: 'text', success: function (data) {$ ("# dd" ).html (data); VaR value = $ ("# dd pre" ).html (); if (value = "undefined" | value = NULL) {value = data;} console.info ("DD:" + value); $ ("# btn_image "). val (value); console.info ("Image:" + $ ("# btn_image "). val (); $ ("# tooltip" ).html ("image imported successfully") ;}, error: function (data) {$ ("# dd "). val (data); console.info ("error"); alert ("error ");}});});

　　

Java code:

 

1 // The myfile attribute is used to encapsulate the uploaded file 2 private file myfile; 3 4 // The myfilecontenttype attribute is used to encapsulate the type of the uploaded file 5 private string myfilecontenttype; 6 7 // The myfilefilename attribute is used to encapsulate the object name to be uploaded. The object name is 8 private string myfilefilename; 9 inputstream is; 10 try {11 is = new fileinputstream (myfile ); 12 // set the Upload File directory 13 string uploadpath = templateutils. basepath + "\ upload"; 14 // rename the file 15 string filename = stringutils. getuuid () + this. getmyfilefilename (). substring (myfilefilename. lastindexof (". "), myfilefilename. length (); 16 // set the target file 17 file tofile = new file (uploadpath, filename); 18 // create an output stream 19 outputstream OS = new fileoutputstream (tofile ); 20 // set cache 21 byte [] buffer = new byte [1024]; 22 int length = 0; 23 // read the myfile file and output it to the tofile 24 while (length = is. read (buffer)> 0) {25 OS. write (buffer, 0, length); 26} 27 // close the input stream 28 is. close (); 29 // close the output stream for 30 OS. close ();

 

　　

 

 

　　

 

　　

SSH Summary (II)