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1. import java.io.BufferedWriter;                                                       
2. import java.io.FileOutputStream;                                                     
3. import java.io.FileWriter;                                                           
4. import java.io.IOException;                                                          
5. import java.io.OutputStreamWriter;                                                   
6. import java.io.RandomAccessFile;                                                     
7.                                                                                      
8.                                                                                      
9. public class WriteStreamAppend {                                                     
10.                                                                                      
11.     public static void method1(String file, String conent) {                         
12.         BufferedWriter out = null;                                                   
13.         try {                                                                        
14.              out = new BufferedWriter(new OutputStreamWriter(                        
15.                     new FileOutputStream(file, true)));                              
16.              out.write(conent);                                                      
17.          } catch (Exception e) {                                                     
18.              e.printStackTrace();                                                    
19.          } finally {                                                                 
20.             try {                                                                    
21.                  out.close();                                                        
22.              } catch (IOException e) {                                               
23.                  e.printStackTrace();                                                
24.              }                                                                       
25.          }                                                                           
26.      }                                                                               
27.                                                                                      
28.                                                                                      
29.     public static void method2(String fileName, String content) {                    
30.         try {                                                                        
31.             // 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      
32.              FileWriter writer = new FileWriter(fileName, true);                     
33.              writer.write(content);                                                  
34.              writer.close();                                                         
35.          } catch (IOException e) {                                                   
36.              e.printStackTrace();                                                    
37.          }                                                                           
38.      }                                                                               
39.                                                                                      
40.                                                                                      
41.     public static void method3(String fileName, String content) {                    
42.         try {                                                                        
43.             // 打开一个随机访问文件流，按读写方式                                    
44.              RandomAccessFile randomFile = new RandomAccessFile(fileName, "rw");     
45.             // 文件长度，字节数                                                      
46.             long fileLength = randomFile.length();                                   
47.             // 将写文件指针移到文件尾。                                              
48.              randomFile.seek(fileLength);                                            
49.              randomFile.writeBytes(content);                                         
50.              randomFile.close();                                                     
51.          } catch (IOException e) {                                                   
52.              e.printStackTrace();                                                    
53.          }                                                                           
54.      }                                                                               
55.                                                                                      
56.     public static void main(String[] args) {                                         
57.          System.out.println("start");                                                
58.          method1("c:/test.txt", "追加到文件的末尾");                                 
59.          System.out.println("end");                                                  
60.      }                   

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