java ArrayList 转 string、string 转 ArrayList

string 转 ArrayList

先将字符串按照某个字符切割，转为string数组

然后用Arrays的asList方法，将数组转为List

public class test1 {    public static void main(String[] args)  {        //string 转 ArrayList        String str1 = "a,b,c";        ArrayList<String> list = new ArrayList<String>(Arrays.asList(str1.split(",")));        System.out.println(list);    }}

ArrayList 转 string

使用org.apache.commons.lang包下的StringUtils类的join方法

public class test1 {    public static void main(String[] args)  {        //ArrayList 转 string        ArrayList<String> list = new ArrayList<String>();        list.add("a");        list.add("b");        list.add("c");        System.out.println(list);//[a, b, c]        String list_str = StringUtils.join(list,",");        System.out.println(list_str);//a,b,c    }}