Java File to String fileToString(File file, String charsetName)

Description

Transforms a file into a string.

License

Apache License

Parameter

Parameter	Description
file	the file to be transformed
charsetName	encoding of the file

Return

the string containing the content of the file

Declaration

public static String fileToString(File file, String charsetName) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.io.BufferedReader;

import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import java.io.Reader;

public class Main {
    /**/*from   w w  w . j  ava  2s.  co  m*/
     * Transforms a file into a string.
     * 
     * @param file
     *            the file to be transformed
     * @param charsetName
     *            encoding of the file
     * @return the string containing the content of the file
     */
    public static String fileToString(File file, String charsetName) {
        FileInputStream fileInputStream = null;
        try {
            try {
                fileInputStream = new FileInputStream(file);
                return streamToString(fileInputStream, charsetName);
            } finally {
                if (fileInputStream != null) {
                    fileInputStream.close();
                }
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }

    /**
     * Transforms a file into a string.
     * 
     * @param fileName
     *            name of the file to be transformed
     * @param charsetName
     *            encoding of the file
     * @return the string containing the content of the file
     */
    public static String fileToString(String fileName, String charsetName) {
        return fileToString(new File(fileName), charsetName);
    }

    /**
     * Transforms a stream into a string.
     * 
     * @param is
     *            the stream to be transformed
     * @param charsetName
     *            encoding of the file
     * @return the string containing the content of the stream
     */
    public static String streamToString(InputStream is, String charsetName) {
        try {
            Reader r = null;
            try {
                r = new BufferedReader(new InputStreamReader(is, charsetName));
                return readerToString(r);
            } finally {
                if (r != null) {
                    try {
                        r.close();
                    } catch (IOException e) {
                    }
                }
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }

    /**
     * Transforms a reader into a string.
     * 
     * @param reader
     *            the reader to be transformed
     * @return the string containing the content of the reader
     */
    public static String readerToString(Reader reader) {
        try {
            StringBuilder sb = new StringBuilder();
            char[] buf = new char[1024];
            int numRead = 0;
            while ((numRead = reader.read(buf)) != -1) {
                sb.append(buf, 0, numRead);
            }
            return sb.toString();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }
}

Related

1. fileToString(File file)
2. fileToString(File file)
3. fileToString(File file)
4. fileToString(File file, int max)
5. fileToString(File file, String charsetName)
6. fileToString(File files[])
7. fileToString(final File file)
8. fileToString(final File file, final String charsetName)
9. fileToString(final String filePath)