Read all file data <% @ Page ContentType = "text / html; charSet = GB2312"%> <% @ page import = "java.io. *, Java.lang. *"%>
Read all file data </ title> </ head> <body> <% string path = request.getRealPath ("."); fileReader fr = new fileReader (Path "//ReadData.txt") ; // The key is that during the reading, it is to be determined whether the read character has reached the end of the file, and this character is not a broken line in the file, ie it is determined whether the character value is 13. INT c = fr.read (); // reads a character // from the file to determine if the file ends are read, while (c! = - 1) {Out.print ((char) c); // Output Data c = fr.read (); // Continue to read data IF from the file (c == 13) {// Judgment whether it is a broken character out.print ("<br>"); // Output Branch Label fr.skip (1); // Skepts a character //c=fr.read();// read a character}} fr.close ();%> </ body> </ html></p>
<p>One line of reading data <% @ page contenttype = "text / html; charset = GB2312"%> <% @ page import = "java.io. *"%> <Html> <head> <title> file read < / title> </ head> <body> <% string path = request.getRealPath (""); // get the path of the current directory FileReader fr = new fileReader (Path "//file/inc/t.txt "); // Establish a FileReader object, and instantiate to fr buildReader Br = New BufferedReader (fr); // Establish a BufferedReader object, and instantiate to br string line = br.readline (); // read a line from file String // Determines if the read string is not empty while (line! = Null) {Out.println (Line "<br>"); / / Output data read from the file line = Br. Readline (); // Continue to read a row data from the file} br.close (); // Close BufferedReader object fr.close (); // Turn file%> </ body> </ html></p>
<p>Broken characters in the file do not read <% @ page contentty = "text / html; charSet = GB2312"%> <% @ page import = "java.io. *"%> <Html> <head> <title> Slightly not reading </ title> </ head> <body> <% string path = request.getRealPath ("."); FileReader fr = new fileReader (Path "//ReadData.txt" );fr .skip (2); // Skip 2 bytes int C = fr.read (); // Read a byte while (c! = - 1) {Out.Print ((char) C); C) = fr.close ();} fr.close ();%> </ body> </ html> write data into file <% @ Page ContentType = "text / html; charSet = GB2312"%> <% @ Page Import = "java.io. *"%> <html> <head> <title> Write data </ title> </ head> <body> <% string path = request.getRealPath ("."); FileWriter FW = New FileWriter (Path "//WriteData.txt": // establishes FileWriter object, and instantiates FW // write strings into file fw.write ("Hello!"); Fw.write "This book is" JSP programming skills ""); fw.write ("Please give me a lot!"); Fw.write ("email: stride@sina.com"); fw.close ();</p>
<p>FileReader fr = new fileReader (Path "//writeData.txt" ); bufferedReader br = New BufferedReader (fr); // Establish a bufferedReader object, and instantiate to brstring line = br.readline (); // read a line Data OUT.PRINTLN (Line "<br>"); br.close (); // Close BufferedReader object fr.close ();%> </ body> </ html></p>
<p><% @ Page contentty = "text / html; charset = GB2312"%> <@ page import = "java.io. *"%> <Html> <head> <title> will write Data Branch of the file </ title> </ head> <body> <% string path = request.getRealPath ("."); FileWriter FW = New FileWriter (Path "//writeData.txt "; bufferedwriter BW = New BufferedWriter (fw); bw.write ("Hello!"); bw.write ("This book is" JSP programming skills "."); bw.newline (); // broken bw.write ("Please more Guao! "); Bw.newline (); // Broken BW.WRITE (" email: stride@sina.com "); bw.flush (); // Update data to file fw.close (); // Turning off file stream out.println ("Write file content: <br>"); fileReader fr = new fileReader (path "//writedata.txt" ); bufferedreader br = new bufferedreader (fr); string line = br .readline (); // reads a line of data while (line! = null) {Out.println (line "<br>"); line = br.readline ();} fr.close ();%> < / Body> </ html></p></div><div class="text-center mt-3 text-grey">
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