Java，

Java，

1.字符串，字符数组和list

public class SplitTest {

	public static void main(String args[]) {

		String str = "a1.png,a2.png,a3.png";// 原始字符串
		String[] arrayStr = new String[] {};// 字符数组
		List<String> list = new ArrayList<String>();// list

		arrayStr = str.split(",");// 字符串转字符数组
		list = java.util.Arrays.asList(arrayStr);// 字符数组转list
		String[] storeStr = list.toArray(new String[list.size()]);// list转成字符数组

		/* 输出字符数组的值 */
		for (String s : arrayStr) {
			System.out.println(s);

		}
		System.out.println("-------------");
		/* 输出list值 */
		for (String s : list) {
			System.out.println(s);

		}
		System.out.println("-------------");

		for (String s : storeStr) {
			System.out.println(s);

		}
		System.out.println("-------------");
	}
}

2.StringBuffer

好处不多说了，StringBuffer对于频繁更改字符串，做字符串相加的操作，更加高效