Groovy 的檔案複製

Groovy 複製檔案的方法:

(1) 一般文字檔

new File(your_source_file).withReader { rdr ->
    new File(your_destination_file).withWriter { wtr ->
        rdr.readLine { line ->
            wtr << line
        }
    }
}

(2) Binary 檔案

def fos = null
def fis = null
try {
    fos = new FileOutputStream(your_destination_file)
    fis = new FileInputStream(your_source_file)
    fos << fis
finally {
    try { fos?.close() } catch(e) { /*ignore*/ }
    try { fis?.close() } catch(e) { /*ignore*/ }
}

(3) 用 ANT utility

new AntBuilder().copy(file: your_source_file, tofile: your_destination_file)

三者各有各的使用情境。