Android BufferedWriter Write writeText(BufferedWriter bw, String text, String prefix)

Description

write text, make every line starts with prefix

Parameter

Parameter	Description
bw	a parameter
text	a parameter
prefix	a parameter

Exception

Parameter	Description
IOException	an exception

Declaration

public static void writeText(BufferedWriter bw, String text,
        String prefix) throws IOException 

Method Source Code

//package com.java2s;
import java.io.BufferedWriter;

import java.io.File;

import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
    public static void writeText(File file, String text) throws IOException {
        writeText(file, text, null);//www .  j ava  2s . c  om
    }

    public static void writeText(File file, String text, String charsetName)
            throws IOException {
        byte[] bytes = charsetName == null ? text.getBytes() : text
                .getBytes(charsetName);
        writeBytes(file, false, bytes);
    }

    /**
     * write text, make every line starts with prefix
     * @param bw
     * @param text
     * @param prefix
     * @throws IOException
     * @see Properties
     */
    public static void writeText(BufferedWriter bw, String text,
            String prefix) throws IOException {
        int len = text.length();
        int current = 0;
        int last = 0;
        while (current < len) {
            char c = text.charAt(current);
            if (c == '\n' || c == '\r') {
                if (last != current)
                    bw.write(prefix + text.substring(last, current));
                bw.newLine();
                last = current + 1;
            }
            current++;
        }
        if (last != current)
            bw.write(prefix + text.substring(last, current));
        bw.flush();
    }

    /**
     * write bytes into file
     * @param file
     * @param append
     * @param bytes
     * @throws IOException
     */
    public static void writeBytes(File file, boolean append, byte[] bytes)
            throws IOException {
        if (bytes.length == 0)
            return;

        FileOutputStream output = new FileOutputStream(file, append);
        output.write(bytes);
        output.flush();
        output.close();
    }
}