java如何实现写入并保存txt文件？
实例代码如下：
package TEST;import java.io.BufferedWriter;import java.io.FileWriter;import java.io.IOException;public class BufferedWriterDemo { public static void main(String[] args) throws IOException { write("E:\\1.txt"); //运行主方法 } public static void write(String path) throws IOException { //将写入转化为流的形式 BufferedWriter bw = new BufferedWriter(new FileWriter(path)); //一次写一行 String ss = "测试数据"; bw.write(ss); bw.newLine(); //换行用 //关闭流 bw.close(); System.out.println("写入成功"); } }
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;}}
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本文标题: java实现写入并保存txt文件的代码详解
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