I/O操作（下）

关于java中读写文件的几种情况的代码：


File.createTempFile(String prefix, String suffix)
File.createTempFile(String prefix, String suffix, File directory)
建立的临时文件可以用delete()方法删除,也可以用deleteOnExit()方法在虚拟机退出时自动删除.

系统标准的临时文件存放目录可以通过系统属性java.io.tmpdir得到
System.getProperty("java.io.tmpdir")

一.读取本地文件为字符串

File file = new File("D:\\test.txt"); //文件路径

BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(file));

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(bufferedInputStream));

StringBuffer strBuffer = new StringBuffer("");

String strLine = bufferedReader.readLine();

while(strLine!=null){

strBuffer.append(strLine);

strLine = bufferedReader.readLine();

}

二.读取网络文件为字符串

java.net.URL url = new URL(http://www.sohu.com/home.html);

java.net.HttpUrlConnection connection= (HttpUrlConnection)url.openConnection();

connection.connect();

InputStream inputStream = connection.getInputStream();

BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));

StringBuffer strBuffer = new StringBuffer("");

String strLine = bufferedReader.readLine();

while(strLine!=null){

strBuffer.append(strLine);

strLine = bufferedReader.readLine();

}