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方法一：
public static void writeToTxtByRandomAccessFile(File file, String str){
RandomAccessFile randomAccessFile = null
try {
randomAccessFile = new RandomAccessFile(file,"rw")
long len = randomAccessFile.length()
randomAccessFile.seek(len)
randomAccessFile.writeBytes(new String(str.getBytes(),"iso8859-1")+"\r\n")
} catch (FileNotFoundException e) {
e.printStackTrace()
}catch (IOException e) {
e.printStackTrace()
}finally{
try {
randomAccessFile.close()
} catch (IOException e) {
e.printStackTrace()
}
}
}
方法二：
public static void writeToTxtByFileWriter(File file, String content){
BufferedWriter bw = null
try {
FileWriter fw = new FileWriter(file, true)
bw = new BufferedWriter(fw)
bw.write(content)
} catch (IOException e) {
e.printStackTrace()
}finally{
try {
bw.close()
} catch (IOException e) {
e.printStackTrace()
}
}
}
方法三：
public static void writeToTxtByOutputStream(File file, String content){
BufferedOutputStream bufferedOutputStream = null
try {
bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(file, true))
bufferedOutputStream.write(content.getBytes())
} catch (FileNotFoundException e) {
e.printStackTrace()
} catch(IOException e ){
e.printStackTrace()
}finally{
try {
bufferedOutputStream.close()
} catch (IOException e) {
e.printStackTrace()
}
}
}
java追加写入txt文件代码及注释参考如下：
public void m() {FileWriter ff= null
try {
//查看C盘是否有a.txt文件来判定是否创建
File f=new File("c:\\a.txt")
ff = new FileWriter(f, true)//将字节写入文件末尾处,相当于追加信息。
} catch (IOException e) {
e.printStackTrace()
}
PrintWriter p = new PrintWriter(ff)
p.println("这里就可以写入要追加的内容了")//此处为追加内容
p.flush()
ff.try {
f.flush()
p.close()
ff.close()
} catch (IOException e) {
e.printStackTrace()
}
}
