how to write data in file in java

static Boolean creattxtfile (String name) throws IOException {Boolean flag = false;filenametemp = path + name + ". txt";File filename = new file (filenametemp);if (!filename.exists ()) {Filename.createnewfile ();Flag = true;}return flag;}/*** Write file** @param newstr* New Content* @throws IOException*/public static

Recently, the project needs to crawl a lot of data from the site, using multithreading technology, each thread crawl data need to be saved to a file, avoid consuming a lot of memory. Idea: Multiple access threads will save the data that needs to be written to a file into a q

import Java.io.File; Import Java.io.FileOutputStream; Import java.io.*; Public classFiletest { Publicfiletest () {} Public Static voidMain (string[] args) {FileOutputStream out=NULL; FileOutputStream outstr=NULL; Bufferedoutputstream Buff=NULL; FileWriter FW=NULL; intCount= +;//number of write file lines Try { out=NewFileOutputStream (NewFile ("c:/add.txt ")); LongBegin =System.curr

Writing to a text file1. Associating read-in files, using reader and FileReader2. Associating written files, using writer and FileWriter3. Create a buffered char array for receiving read-through text information4. Read the text into the buffer array (buff)5. Output the text information read6. Write down the Read file7. Turn off write file stream8. Turn off Read

No nonsense, on the horse.Import Java.io.File;Import java.io.IOException;Import Java.io.RandomAccessFile;Import Java.nio.channels.FileChannel;Import Java.nio.channels.FileLock;/*** @author DBJ**/public class Mythreadinfowritor {private String filename;/****/Public Mythreadinfowritor (String fileName) {This.filename = filename;}public void Write (Mythreadinfo tinfo) {Randomaccessfile out = null;File

byte[] B =New byte[3];//reading byte numbers, creating arraysRandomaccess.read (b, 1, 2);//read two bytes from pointer 1 write to array bString s =NewString (b);//Convert to StringSystem.out.println ("byte:" +s);//Output//Write FileFile file2 =NewFile ("C:\\img\\777.txt"); if(!File2.getparentfile (). exists ()) {File2.getparentfile (). Mkdirs (); } file2.cre

Java read-write configuration file prop.properties@Testpublic void Fun () throws ioexception{Properties Prop=new properties ();String Path2=this.getclass (). GetResource ("/test/conf/file.properties"). GetPath ();System.out.println (path2);InputStream in=new Bufferedinputstream (New FileInputStream (path2));Prop.load (in);Integer Count=integer.parseint (Prop.getp

blank, no comment information. The comment information is followed by the current save time information for the property file. (3) Getproperty/setproperty The two methods are to get and set property information, respectively. three. Code Examples Properties The file a.properties is as follows: Name=rootpass=liukey=value reads the A.properties property list, with the build properties

comment information is followed by the current save time information for the property file.(3) Getproperty/setpropertyThe two methods are to get and set property information, respectively.3. Code examplesThe properties file A.properties as follows:Name=rootpass=liukey=valueReads the A.properties property list, with the build properties file b.properties. The cod

Flume Learning application: Write log data to MongoDB and flumemongodb in JavaOverview Windows: Java writes logs to Flume, and Flume writes the logs to MongoDB. System Environment Operating System: win7 64 JDK: 1.6.0 _ 43 Download Resources Maven: 3.3.3Download, install, and get started: 1. Maven-start and 2. Create a simple Maven Project Flume: 1.6.0Downl

No more nonsense, straight into the subject: The code is as follows: 1. Read log or txt text information /*** Read log or txt information** @param FilePath* @return*/Public listlist try { fileinputstream is = new FileInputStream (filePath); inputstreamreader ISR = new InputStreamReader (IS); bufferedreader br = new BufferedReader (ISR); string Line; try { while (line = Br.readline ())!= null) { if (Line.equals ("")) continue; else list.add (line); NBSP;NBSP;NBSP;NBSP} } catch (IOExcep

PackageCn.stat.p2.demo;Importjava.io.FileNotFoundException;Importjava.io.IOException;ImportJava.io.RandomAccessFile; Public classRandomaccessfiledemo {/** * @paramargs *@throwsIOException*/ Public Static voidMain (string[] args)throwsIOException {//TODO auto-generated Method StubRadomwrite (); Radomread (); } Public Static voidRadomread ()throwsFileNotFoundException, IOException {randomaccessfile RAF=NewRandomaccessfile ("Demo.txt", "RW"); byte[] buf=New byte[4]; Ra