1 import java.io.BufferedWriter;
2 import java.io.File;
3 import java.io.FileOutputStream;
4 import java.io.FileWriter;
5 import java.io.IOException;
6 import java.io.OutputStreamWriter;
7 import java.io.RandomAccessFile;
8
9 /**
10 *
11 * @author FJL
12 * @version 2013-10-1
13 */
14 public class AppendFile {
15
16 public static void method1(String file, String conent) {
17 BufferedWriter out = null;
18 try {
19 out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, true)));
20 out.write(conent);
21 } catch (Exception e) {
22 e.printStackTrace();
23 } finally {
24 try {
25 if(out != null){
26 out.close();
27 }
28 } catch (IOException e) {
29 e.printStackTrace();
30 }
31 }
32 }
33
34 /**
35 * 追加文件：使用FileWriter
36 *
37 * @param fileName
38 * @param content
39 */
40 public static void method2(String fileName, String content) {
41 FileWriter writer = null;
42 try {
43 // 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
44 writer = new FileWriter(fileName, true);
45 writer.write(content);
46 } catch (IOException e) {
47 e.printStackTrace();
48 } finally {
49 try {
50 if(writer != null){
51 writer.close();
52 }
53 } catch (IOException e) {
54 e.printStackTrace();
55 }
56 }
57 }
58
59 /**
60 * 追加文件：使用RandomAccessFile
61 *
62 * @param fileName 文件名
63 * @param content 追加的内容
64 */
65 public static void method3(String fileName, String content) {
66 RandomAccessFile randomFile = null;
67 try {
68 // 打开一个随机访问文件流，按读写方式
69 randomFile = new RandomAccessFile(fileName, "rw");
70 // 文件长度，字节数
71 long fileLength = randomFile.length();
72 // 将写文件指针移到文件尾。
73 randomFile.seek(fileLength);
74 randomFile.writeBytes(content);
75 } catch (IOException e) {
76 e.printStackTrace();
77 } finally{
78 if(randomFile != null){
79 try {
80 randomFile.close();
81 } catch (IOException e) {
82 e.printStackTrace();
83 }
84 }
85 }
86 }
87
88 public static void main(String[] args) {
89 try{
90 File file = new File("d://text.txt");
91 if(file.createNewFile()){
92 System.out.println("Create file successed");
93 }
94 method1("d://text.txt", "123");
95 method2("d://text.txt", "123");
96 method3("d://text.txt", "123");
97 }catch(Exception e){
98 System.out.println(e);
99 }
100 }
101 }
