java 字符串string int和arraylist互转

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 ArrayListString str1 = "a,b,c";ArrayList<String> list = new ArrayList<String>(Arrays.asList(str1.split(",")));System.out.println(list);}}

ArrayList 转 string

public class test1 {public static void main(String[] args) {//ArrayList 转 stringArrayList<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}}

如果是int转arraylist，则将int先转换为string

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