Groovy 文件操作

文件操作

// 创建文件夹
wasCreated = new File('mydir').mkdir()
wasCreated = new File('mydir/subdir').mkdirs()

// 写文件
f = new File('myfile.txt')
f.write('hello world!')

// 写文件2
f = new File(‘myfile.txt’)
f.text = ‘Hello World!’

// 追加文件
f = new File('myfile.txt')
f.append('hello again!')

// 遍历文件
def dir = new File('/home/groovy/projects/test/src')
dir.traverse(
        type:FileType.FILES,
        nameFilter:~/.*\.groovy/
    ) {
        println it
    };

// 遍历文件 with depth. 0 -> max depth
def dir = new File('/home/groovy/projects/test/src')
dir.traverse(
    type:FileType.FILES,
    nameFilter:~/.*\.groovy/,
    maxDepth:0 
  ) {
    println it
  };

// 不同文件类型
dir.traverse(
    type:FileType.FILES,
    nameFilter:~/.*\.jar|.*\.java|.*\.xml/
  ) {
    println it
  };

// 列出文件
def dir = new File('/home')
dir.eachFile { 
    if (it.isFile()) {
        println it.canonicalPath
    }
}

// 
def dir = new File('/home')
dir.traverse {
    println it
}

// 
def dir = new File('/home')
dir.traverse(maxDepth:0) {
    println it
};

// 找出文件路径
file = new File('yourfile.txt')
println file.canonicalPath

// 保存一个网页到文件
def address = 'http://groovy.codehaus.org/'
def filename = 'groovy.html'
 
def file = new FileOutputStream(filename)
def out = new BufferedOutputStream(file)
out << new URL(address).openStream()
out.close()

// read file line by line
def file = new File('hello.txt')
file.eachLine { line ->
    println line
}

// read file
def input = new File('hello.txt')
println input.text