//一個簡單的刪除文件代碼
public boolean deleteFile(String sPath) {
boolean flag = false;
File file = new File(sPath);
// 路徑爲文件且不爲空則進行刪除
if (file.isFile() && file.exists()) {
file.delete();
System.out.println("delete file.");
flag = true;
}
return flag;
}單獨測試刪除代碼沒有問題。
後來在讀文件的方法中調用刪除方法，在讀取完畢後刪除。
public void readFile(String filename)
{
FileReader reader = null;
try
{
reader = new FileReader(filename);// 讀取url文件
}
catch (FileNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
String name = filename.split("\\\\")[filename.split("\\\\").length-1];
System.out.println("filename is "+ filename);
BufferedReader br = new BufferedReader(reader);
String s1 = null;
String temStr = "";
String content = "";
int breakCount = 0;
try
{
while ((s1 = br.readLine()) != null)
{
breakCount++;
if(s1.contains("------------------------"))
{
}
else
{
if(breakCount == 2 && s1.contains("docid"))
{
break;
}
}
}
if(breakCount != 2)
{
System.out.println(breakCount);
boolean flag = deleteFile(filename);
System.out.println(flag);
}
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
try
{
br.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
try
{
reader.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}這樣寫的時候遇到了問題，delete方法返回了true值，但是文件並沒有被刪除
檢查之後發現是因爲文件的讀取流未關閉，造成文件無法刪除。
但是爲什麼會返回true還沒有確定，估計是個小bug吧
把代碼修改一下
public void readFile(String filename)
{
FileReader reader = null;
try
{
reader = new FileReader(filename);// 讀取url文件
}
catch (FileNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
String name = filename.split("\\\\")[filename.split("\\\\").length-1];
System.out.println("filename is "+ filename);
BufferedReader br = new BufferedReader(reader);
String s1 = null;
String temStr = "";
String content = "";
int breakCount = 0;
try
{
while ((s1 = br.readLine()) != null)
{
breakCount++;
if(s1.contains("------------------------"))
{
}
else
{
if(breakCount == 2 && s1.contains("docid"))
{
break;
}
}
}
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
try
{
br.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
try
{
reader.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
if(breakCount != 2)
{
System.out.println(breakCount);
boolean flag = deleteFile(filename);
System.out.println(flag);
}
}把刪除放在流關閉之後，這樣就沒有問題了