Java How to convert a File object to a String object in java

Question

Possible Duplicate    How to create a Java String from the contents of a file       I have a html file which I want to use to extract information  For that I am using Jsoup  Now for using Jsoup  I need to convert the html file into a string  How can I do that   File myhtml   new File  D   path  report html       Now  I want a String object that contains the content inside the html file

User · Answer

Use a library like Guava or Commons   IO  They have oneliner methods   Guava   Files toString file  charset     Commons   IO   FileUtils readFileToString file  charset     Without such a library  I d write a helper method  something like this   public String readFile File file  Charset charset  throws IOException       return new String Files readAllBytes file toPath     charset

User · Answer

I use apache common IO to read a text file into a single string  String str   FileUtils readFileToString file     simple and  clean   you can even set encoding of the text file with no hassle   String str   FileUtils readFileToString file   UTF-8

User · Answer

With Java 7  it s as simple as   final String EoL   System getProperty  line separator    List lt String gt  lines   Files readAllLines Paths get fileName           Charset defaultCharset      StringBuilder sb   new StringBuilder    for  String line   lines        sb append line  append EoL     final String content   sb toString      However  it does havea few minor caveats  like handling files that does not fit into the memory    I would suggest taking a look on corresponding section in the official Java tutorial  that s also the case if you have a prior Java    As others pointed out  you might find sime 3rd party libraries useful  like Apache commons I O or Guava

User · Answer

You can copy all contents of myhtml to String as follows   Scanner myScanner   null  try       myScanner   new Scanner myhtml       String contents   myScanner useDelimiter    Z   next       finally       if myScanner    null                myScanner close               Ofcourse  you can add a catch block to handle exceptions properly

User · Answer

By the way  Jsoup has method that takes file  http   jsoup org apidocs org jsoup Jsoup html parse java io File  20java lang String

User · Answer

Readin file with file inputstream and append file content to string   import java io File  import java io FileInputStream  import java io IOException   public class CopyOffileInputStream        public static void main String   args               File file   new File    store robots txt            File file   new File  swingloggingsscce log             FileInputStream fis   null          String str                try               fis   new FileInputStream file               int content              while   content   fis read       -1                       convert to char and display it                 str     char  content                             System out println  After reading file                System out println str              catch  IOException e                e printStackTrace              finally               try                   if  fis    null                      fis close                  catch  IOException ex                    ex printStackTrace

User · Answer

Why you just not read the File line by line and add it to a StringBuffer   After you reach end of File you can get the String from the StringBuffer

[java] Java: How to convert a File object to a String object in java?

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