Java IO操作

Java IO流的分类
输入流
输出流

字节流 FileInputStream(字节输入流)  FileOutputStream(字节输出流)
字符流 FileReader(字符输入流)       FileWriter(字符输出流)

节点流 就是普通的IO流
处理流 BufferReader               BufferWriter

/**
* 读取数据后写入到另外一个文件中
* @Methodname: readAndWriteFile
* @Discription: TODO
* @param path
* @param path2
* @Return: void
* @Throws
*
*/
public static void readAndWriteFile(String path , String path2){
FileInputStream fis = null;
FileOutputStream fos = null;
try {
fis = new FileInputStream(path);
fos = new FileOutputStream(path2);
byte[] buffer = new byte[1024];
//读进来的数据就放到b里面，从0开始
int temp;
while((temp = fis.read(buffer, 0, buffer.length))!= -1){
fos.write(buffer, 0, temp);
}
} catch (Exception e) {
e.printStackTrace();
} finally{
try {
fis.close();
fos.close();
} catch (IOException e) {
e.printStackTrace();
}

}
}

public static String readerText(String url){
StringBuffer sb = new StringBuffer();
BufferedReader in = null;
String line = null;
try {
in = new BufferedReader(new FileReader(url));
while((line=in.readLine()) !=null ){
sb.append(line);
}
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return sb.toString();
}