1 Stream流
public static String parseListToStr(List list){
String result = list.stream().map(String::valueOf).collect(Collectors.joining(“,”));
return result;
}
2 使用谷歌Joiner方法
import com.google.common.base.Joiner;
public static String parseListToStr1(List list){
String result = Joiner.on(“,”).join(list);
return result;
}
3 循环插入逗号
public static String parseListToStr2(List list) {
StringBuffer sb=new StringBuffer();
if( listIsNotFull ( list ) ){
for(int i = 0; i < = list.size()-1;i++){
sb.append(list.get(i)+”,”);
}else{
sb.append(list.get(i));
}
}
return sb.toString();
}
4 lambda表达式遍历并加入符号
public static String parseListToStr3(List list){
StringBuffer sb = new StringBuffer();
list.stream().forEach(str – > { sb .append(str). append(“,”);});
sb.deleteCharAt(sb.length()-1);
return sb.toString();
}
5 org.apache.commons.lang.StringUtils lang包下面
public static String parseListToStr3(List list){
String str= StringUtils.join(list,”,”);
return str;
}
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