List、Set、 数组等转字符串
public class Test { public static void main(String[] args) { String str = ""; // list转字符串 List<String> list = new ArrayList<String>(); list.add("A"); list.add("B"); list.add("C"); str = StringUtils.join(list.toArray(), ","); // 根据不同切割符返回字符串 System.out.println("正常List转换:"+ str); list.clear(); str = StringUtils.join(list.toArray(), ","); System.out.println("size为0转换:"+ str); // 字符串数组转为字符串 String[] strArray = {"AA", "BB", "CC", "DD"}; str = StringUtils.join(strArray, "-"); System.out.println("正常数组转换:"+ str); strArray = new String[3]; str = StringUtils.join(strArray, "-"); System.out.println("特殊数组转换:"+str); // Integer引用类型转字符串 Integer[] array = new Integer[3]; array[0] = 1; array[2] = 2; str = StringUtils.join(array, "-"); System.out.println("Integer转换:"+str); // set转换为字符串 Set<String> set = new HashSet<String>(); set.add("AA"); set.add("BB"); set.add("CC"); str = StringUtils.join(set.toArray(), ";"); System.out.println("特殊数组转换:"+str); } }