java中有没有生成临时文件的方法？

[tenix]

java程序中需要生成一个临时文件，java中有没有这样的方法，指定一个路径，自动在路径下生成一个文件，和已有文件都不重名？

[Eraserpro]

有,java.io.File中的createTempFile(String prefix, String suffix)方法

[colin_lgh]

java.io.File类
static File createTempFile(String prefix, String suffix)
static File createTempFile(String prefix, String suffix, File directory)

Creates an empty file in the default temporary-file directory or in the specified directory, using the given prefix and suffix to generate its name. Invoking this method is equivalent to invoking createTempFile(prefix, suffix, null).

Parameters:
prefix - The prefix string to be used in generating the file's name; must be at least three characters long
suffix - The suffix string to be used in generating the file's name; may be null, in which case the suffix ".tmp" will be used
direcotory - The directory in which the file is to be created, or null if the default temporary-file directory is to be used

Returns:
An abstract pathname denoting a newly-created empty file
Throws:
IllegalArgumentException - If the prefix argument contains fewer than three characters
IOException - If a file could not be created
SecurityException - If a security manager exists and its SecurityManager.checkWrite(java.lang.String) method does not allow a file to be created
Since:
1.2