根据txt文件处理的方法总结

package com.horizon.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.RandomAccessFile;

public class TxtFile {

    /**
     * 写入文本文件.
     * @param file_path
     * @param content
     * @throws IOException
     */
    public void write(String file_path, String content) throws IOException {
        File file = new File(file_path);
        if (!file.exists()) {
            file.createNewFile();
        }
        String filein = content;
        RandomAccessFile mm = null;
        try {
            // 清空内容
            FileWriter fw = new FileWriter(file);
            fw.write("");
            fw.close();
            // 写入内容
            mm = new RandomAccessFile(file, "rw");
            mm.write(filein.getBytes("UTF-8"));//防止写入的中文内容为乱码
        } catch (IOException e1) {
            throw e1;
        } finally {
            if (mm != null) {
                try {
                    mm.close();
                } catch (IOException e2) {
                    e2.printStackTrace();
                }
            }
        }
    }

    /**
     * 读取文本文件.
     * @throws IOException 
     */
    public static String readTxtFile(String file_path) throws IOException {
        String read = null;
        FileReader fileread = null;
        BufferedReader bufread = null;
        String readStr = "";
        try {
            File filename = new File(file_path);
            fileread = new FileReader(filename);
            bufread = new BufferedReader(fileread);
            while ((read = bufread.readLine()) != null) {
                readStr = readStr + read + "\r\n";
            }
        } catch (FileNotFoundException e) {
            throw e;
        }
        return readStr;
    }
    // 测试
    @SuppressWarnings("static-access")
    public static void main(String[] args) {
        try {
            String file_path = "D:/test.txt";
            TxtFile txtFile = new TxtFile();
            txtFile.write( file_path, "this is horizon's ceshi!!!");
            System.out.println(txtFile.readTxtFile(file_path));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}