Java追加文件内容的三种方法实例代码

 import Java.io.BufferedWriter; import java.io.File; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.OutputStreamWriter; import java.io.RandomAccessFile; /** * * @author malik * @version 2011-3-10 下午10:49:41 */ public class AppendFile { public static void method1(String file, String conent) { BufferedWriter out = null; try { out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true))); out.write(conent); } catch (Exception e) { e.printStackTrace(); } finally { try { if(out != null){ out.close(); } } catch (IOException e) { e.printStackTrace(); } } } /** * 追加文件：使用FileWriter * * @param fileName * @param content */ public static void method2(String fileName, String content) { FileWriter writer = null; try { // 打开一个写文件器，构造函数中的第二个参数true表示以追加形式写文件 writer = new FileWriter(fileName, true); writer.write(content); } catch (IOException e) { e.printStackTrace(); } finally { try { if(writer != null){ writer.close(); } } catch (IOException e) { e.printStackTrace(); } } } /** * 追加文件：使用RandomAccessFile * * @param fileName 文件名 * @param content 追加的内容 */ public static void method3(String fileName, String content) { RandomAccessFile randomFile = null; try { // 打开一个随机访问文件流，按读写方式 randomFile = new RandomAccessFile(fileName, "rw"); // 文件长度，字节数 long fileLength = randomFile.length(); // 将写文件指针移到文件尾。 randomFile.seek(fileLength); randomFile.writeBytes(content); } catch (IOException e) { e.printStackTrace(); } finally{ if(randomFile != null){ try { randomFile.close(); } catch (IOException e) { e.printStackTrace(); } } } } public static void main(String[] args) { try{ File file = new File("d://text.txt"); if(file.createNewFile()){ System.out.println("Create file successed"); } method1("d://text.txt", "123"); method2("d://text.txt", "123"); method3("d://text.txt", "123"); }catch(Exception e){ System.out.println(e); } } }