将List集合转化为用符号隔开的String字符串

org.apache.commons.lang3.StringUtils.join(list, “,”)

运行结果：


运行结果：

方法一：

public String listToString(List list, char separator) {
         StringBuilder sb = new StringBuilder();    for (int i = 0; i < list.size(); i++) {
             sb.append(list.get(i)).append(separator);    }    return sb.toString().substring(0,sb.toString().length()-1);}
 

方法二：

public String listToString(List list, char separator) {
         StringBuilder sb = new StringBuilder();    for (int i = 0; i < list.size(); i++) {
             if (i == list.size() - 1) {
                 sb.append(list.get(i));        } else {
                 sb.append(list.get(i));            sb.append(separator);        }    }    return sb.toString();}

方法三：

public String listToString(List list, char separator) {
         StringBuilder sb = new StringBuilder();     for (int i = 0; i < list.size(); i++) {
             sb.append(list.get(i));        if (i < list.size() - 1) {
                 sb.append(separator);        }    }    return sb.toString();}

方法四：

public class Separator {
         private String next = "";    private String separator;    public Separator(String separator) {
         this.separator = separator;    }    public String get() {
         String result = next;    next = separator;    return result;    }}public String listToString(List<String> list, Separator separator) {
         StringBuilder sb = new StringBuilder();    for (String s : list) {
             if (s != null && !"".equals(s)) {
                 sb.append(separator.get()).append(s);        }    }    return sb.toString();}

方法五：

    public String listToString(List list, char separator) {
         return org.apache.commons.lang.StringUtils.join(list.toArray(),separator);    }