1.使用FileInputStream實現讀取txt文件內容:java
2.使用FileOutputStream實現寫入txt文件內容:app
package cn.xiaobing.util; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStreamReader; public class ReadTxt { /**傳入txt路徑讀取txt文件 * @param txtPath * @return 返回讀取到的內容 */ public static String readTxt(String txtPath) { File file = new File(txtPath); if(file.isFile() && file.exists()){ try { FileInputStream fileInputStream = new FileInputStream(file); InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream); BufferedReader bufferedReader = new BufferedReader(inputStreamReader); StringBuffer sb = new StringBuffer(); String text = null; while((text = bufferedReader.readLine()) != null){ sb.append(text); } return sb.toString(); } catch (Exception e) { e.printStackTrace(); } } return null; } /**使用FileOutputStream來寫入txt文件 * @param txtPath txt文件路徑 * @param content 須要寫入的文本 */ public static void writeTxt(String txtPath,String content){ FileOutputStream fileOutputStream = null; File file = new File(txtPath); try { if(file.exists()){ //判斷文件是否存在,若是不存在就新建一個txt file.createNewFile(); } fileOutputStream = new FileOutputStream(file); fileOutputStream.write(content.getBytes()); fileOutputStream.flush(); fileOutputStream.close(); } catch (Exception e) { e.printStackTrace(); } } }
3.驗證代碼學習
//驗證方法:先寫入文件後讀取打印以下: public static void main(String[] args) { writeTxt("D:/yzm/result1.txt", "測試寫入txt文件內容"); String str = readTxt("D:/yzm/result1.txt"); System.out.println(str); }
控制檯輸出:測試
4.學習後總結,不足之處,後續補充!spa