同样是 下载文件，但是字符流中却不能打开文件，而字节流却能打开，不知道为啥？
/**
* 用的是字符流操作，竟然打不开
* @param url
* @param fileName
* @param title
*/
public static void downloadByURLAndName(String url,String fileName,String title){
System.out.println("downloadByURLAndName");
try {
URL httpUrl=new URL(url);
HttpURLConnection con=(HttpURLConnection)httpUrl.openConnection();
InputStreamReader ins=new InputStreamReader(con.getInputStream(),"utf-8");
BufferedReader br=new BufferedReader(ins);
new File("F:\\imooc/Java/"+title+"/").mkdir();
File file=new File("F:\\imooc/Java/"+title+"/"+fileName);
FileWriter fileWriter=new FileWriter(file);
String str="";
while((str=br.readLine())!=null){
fileWriter.write(str);
fileWriter.flush();
}
fileWriter.close();
br.close();
ins.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 用字节流处理,竟然可以
* @param url
* @param fileName
* @param title
*/
public static void downloadByURLAndName2(String url,String fileName,String title){
// System.out.println("downloadByURLAndName");
long startTime;
long bytes;
startTime=System.currentTimeMillis();
bytes=0;
try {
URL httpUrl=new URL(url);
HttpURLConnection con=(HttpURLConnection)httpUrl.openConnection();
InputStream in=con.getInputStream();
new File("F:\\imooc/Java/"+title+"/").mkdir();
File file=new File("F:\\imooc/Java/"+title+"/"+fileName);
FileOutputStream fos=new FileOutputStream(file);
byte[] b=new byte[512*1024];
int len;
while((len=in.read(b))!=-1){
bytes+=len;
fos.write(b, 0, len);
}
fos.close();
in.close();
System.out.println(fileName+"下载完成");
long endTime=System.currentTimeMillis();
long bp=(bytes/((endTime-startTime)));
Main.bps.add(bp);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}