java创建txt文件并存入内容-蒲公英云

java创建txt文件并存入内容

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
public class txtExport {
    private static String path = "D:/";
    private static String filenameTemp;
    public static void main(String[] args) throws IOException {
        txtExport.creatTxtFile("你好");
        txtExport.writeTxtFile("你好");
    }
    /**
     * 创建文件
     * 
     * @throws IOException
     */
    public 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;
    }
    /**
     * 写文件
     * 
     * @param newStr
     *            新内容
     * @throws IOException
     */
    public static boolean writeTxtFile(String newStr) throws IOException {
        // 先读取原有文件内容，然后进行写入操作
        boolean flag = false;
        String filein = newStr + "\r\n";
        String temp = "";
        FileInputStream fis = null;
        InputStreamReader isr = null;
        BufferedReader br = null;
        FileOutputStream fos = null;
        PrintWriter pw = null;
        try {
            // 文件路径
            File file = new File(filenameTemp);
            // 将文件读入输入流
            fis = new FileInputStream(file);
            isr = new InputStreamReader(fis);
            br = new BufferedReader(isr);
            StringBuffer buf = new StringBuffer();
            // 保存该文件原有的内容
            for (int j = 1; (temp = br.readLine()) != null; j++) {
                buf = buf.append(temp);
                // System.getProperty("line.separator")
                // 行与行之间的分隔符 相当于“\n”
                buf = buf.append(System.getProperty("line.separator"));
            }
            buf.append(filein);
            fos = new FileOutputStream(file);
            pw = new PrintWriter(fos);
            pw.write(buf.toString().toCharArray());
            pw.flush();
            flag = true;
        } catch (IOException e1) {
            // TODO 自动生成 catch 块
            throw e1;
        } finally {
            if (pw != null) {
                pw.close();
            }
            if (fos != null) {
                fos.close();
            }
            if (br != null) {
                br.close();
            }
            if (isr != null) {
                isr.close();
            }
            if (fis != null) {
                fis.close();
            }
        }
        return flag;
    }
}