Java appends three method instance codes to file content

Sort out the documents, find out the code of 3 methods of adding Java file content, sort out and simplify a little, and share a little.

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  In the afternoon 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();   
      }   
    }   
  }   
  
  /**  
   *  Append file: use FileWriter  
   *  
   * @param fileName  
   * @param content  
   */  
  public static void method2(String fileName, String content) {  
    FileWriter writer = null; 
    try {   
      //  Open the 1 A file writer, the first in the constructor 2 A parameter true Indicates that the file is written as an append    
      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();   
      }   
    }  
  }   
  
  /**  
   *  Append file: use RandomAccessFile  
   *  
   * @param fileName  The file name   
   * @param content  Additional content   
   */  
  public static void method3(String fileName, String content) {  
    RandomAccessFile randomFile = null; 
    try {   
      //  Open the 1 Five random access file streams, read and write    
      randomFile = new RandomAccessFile(fileName, "rw");   
      //  File length, number of bytes    
      long fileLength = randomFile.length();   
      //  Moves the write file pointer to the end of the file.    
      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); 
    } 
  } 
}