Java文件读写 & 输出换行符

都拷贝为主的，然后又稍微修改了下。

public static String[] readFile(String readFilePath) throws Exception {

FileReader reader = new FileReader(readFilePath);

BufferedReader br = new BufferedReader(reader);

String readContent[] = new String[999999];

int i = 0;

while((readContent[i] = br.readLine()) != null) {

i++;

}

br.close();

reader.close();

return readContent;

}   

public static void writeFile(String writeFilePath,String writeContent[]) throws Exception {

File file = new File(writeFilePath);

FileWriter filewriter = new FileWriter(file, true);

String lineSeparator = (String) java.security.AccessController.doPrivileged(new sun.security.action.GetPropertyAction("line.separator"));

for (int i=0;i<writeContent.length;i++) {

if (writeContent[i] != null) {

filewriter.write(writeContent[i]+lineSeparator);

}

}

filewriter.close();

} 

再特别强调下这个，代表换行符，虽然不知道具体意思- - ：

String lineSeparator = (String) java.security.AccessController.doPrivileged(new sun.security.action.GetPropertyAction("line.separator"));