读写文件是最常用的操作之一，每次将相应的代码片段复制过来不仅麻烦，还会影响整体的美观。为此我单独写了一个文件操作的类，需要时先把这个类的代码粘过去，再调用就方便多了。
import java.io.BufferedReader; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStreamReader; import java.io.OutputStreamWriter; import java.util.ArrayList; import java.util.List; public class FileManager { public static String read(String fileName, String encoding) { StringBuffer fileContent = new StringBuffer(); try { FileInputStream fis = new FileInputStream(fileName); InputStreamReader isr = new InputStreamReader(fis, encoding); BufferedReader br = new BufferedReader(isr); String line = null; while ((line = br.readLine()) != null) { fileContent.append(line); fileContent.append(System.getProperty("line.separator")); } br.close(); isr.close(); fis.close(); } catch (Exception e) { e.printStackTrace(); } return fileContent.toString(); } public static void write(String fileContent, String fileName, String encoding) { try { FileOutputStream fos = new FileOutputStream(fileName); OutputStreamWriter osw = new OutputStreamWriter(fos, encoding); osw.write(fileContent); osw.flush(); osw.close(); fos.close(); } catch (Exception e) { e.printStackTrace(); } } } |
调用示例：
写入 FileManager.write("Hello, World!", "D:\\test.txt", "UTF-8");
读取 System.out.println(FileManager.read("D:\\test.txt", "UTF-8"));
