JAVA 创建TXT文件，写入文件内容，读取文件内容

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.RandomAccessFile;

public class FileOperation {

/**
* 创建文件
* @param fileName
* @return
*/
public static boolean createFile(File fileName)throws Exception{
boolean flag=false;
try{
if(!fileName.exists()){
fileName.createNewFile();
flag=true;
}
}catch(Exception e){
e.printStackTrace();
}
return true;
}

/**
* 读TXT文件内容
* @param fileName
* @return
*/
public static String readTxtFile(File fileName)throws Exception{
String result=null;
FileReader fileReader=null;
BufferedReader bufferedReader=null;
try{
fileReader=new FileReader(fileName);
bufferedReader=new BufferedReader(fileReader);
try{
String read=null;
while((read=bufferedReader.readLine())!=null){
result=result+read+"\r\n";
}
}catch(Exception e){
e.printStackTrace();
}
}catch(Exception e){
e.printStackTrace();
}finally{
if(bufferedReader!=null){
bufferedReader.close();
}
if(fileReader!=null){
fileReader.close();
}
}
System.out.println("读取出来的文件内容是："+"\r\n"+result);
return result;
}

public static boolean writeTxtFile(String content,File fileName)throws Exception{
RandomAccessFile mm=null;
boolean flag=false;
FileOutputStream o=null;
try {
o = new FileOutputStream(fileName);
o.write(content.getBytes("GBK"));
o.close();
// mm=new RandomAccessFile(fileName,"rw");
// mm.writeBytes(content);
flag=true;
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}finally{
if(mm!=null){
mm.close();
}
}
return flag;
}
}