java读取文件,写入换行

FileReader fr = null;
FileWriter fw=null;
try {
fr = new FileReader("english.txt");
fw= new FileWriter("english2.txt");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
System.out.println(e.getMessage());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

BufferedReader bf=new BufferedReader(fr);
BufferedWriter bw=new BufferedWriter(fw);
String str=null;//取一行
StringBuffer strb = null;//对string的插入操作需要用StringBuffer类型
try {
while((str=bf.readLine())!=null){ //一行一行的读取全部内容
strb=new StringBuffer(str);
if(str.lastIndexOf(" ")!=-1) { //判断是否存在 空格符
strb.insert(strb.indexOf(" "), "|");
}
else{
for(int i=0;i if(strb.charAt(i)>122)
strb.insert(i,"|");
}
}
fw.write(strb.toString());
fw.write("\r\n");//写入换行
}
} catch (IOException e) {
// TODO Auto-generated catch block
System.out.println(e.getMessage());
}

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