org.apache.commons.lang.ArrayUtils

例1: 数组打印:
数组aStr: { "abc", "uvw", "xyz", "123", "456" }
ArrayUtils.toString(aStr):{abc,uvw,xyz,123,456}

例2: 数组是否包含某元素:
数组aStr: { "abc", "uvw", "xyz", "123", "456" }
ArrayUtils.contains(aStr, "456"): true
ArrayUtils.contains(aStr, "XYZ"): false