public static String read(String file) {
StringBuilder sb = new StringBuilder();
try {
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(file),"GBK"));
String s;
while ((s = in.readLine()) != null) {
sb.append(s+"\n");
}
sb.deleteCharAt(sb.length()-1);
in.close();
} catch (IOException ex) {
Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
}
return sb.toString();
}
将上边代码读取到的内容再用BufferedWriter写到文件中时 换行符都没了
如何才能保持String里的格式写入文件啊
注：不是做copy用
1、在windows中就用\r\n,在linux中用\n.
2、建议LZ不要使用硬编码，而用String LINE_SEPARATOR=System.getProperty("line.separator")，这个LINE_SEPARATOR就是一个回车换行符，这样跨系统也不用怕了.
sb.deleteCharAt(sb.length()-1);
这一行去掉吧。
用BufferedWriter的println，读一行就写一行
没读懂LZ的意思，能举个例子描述下吗
[quote]while ((s = in.readLine()) != null) { [/quote]
你这不就是读了一行吗???
直接把读到的这一行(s)写到文件里不就行了,不要全部拼好啊
[code="java"]
public static void read(String file) {
// StringBuilder sb = new StringBuilder();
PrintWriter out = null;
BufferedReader in = null;
try {
out = new PrintWriter(new OutputStreamWriter(new FileOutputStream("aa")));
in = new BufferedReader(new InputStreamReader(new FileInputStream(file),"GBK"));
String s;
while ((s = in.readLine()) != null) {
out.println(s);
// sb.append(s+"\n");
}
// sb.deleteCharAt(sb.length()-1);
in.close();
} catch (IOException ex) {
// Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
} finally {
try {
if (in != null) in.close();
} catch (IOException e) {
e.printStackTrace();
}
if (out != null) out.close();
}
// return sb.toString();
}
[/code]
改成差不多这个样子,不就可以了?
[code="java"]
public static String read(String file) {
StringBuilder sb = new StringBuilder();
try {
BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(file),"GBK"));
String s;
while ((s = in.readLine()) != null) {
sb.append(s+"\r\n");
}
sb.deleteCharAt(sb.length()-1);
in.close();
} catch (IOException ex) {
Logger.getLogger(Encrypt.class.getName()).log(Level.SEVERE, null, ex);
}
return sb.toString();
}
[/code]