【java】List＜string＞转string

list 转 string,string

String name = String.join(",", list);

 "list":[
	"小王",
	"小刘",
	"小张",
	"小胡"
       ]

// 打印  name = "小王,小刘,小张,小胡"

list 转 {string},{string}

 String name = List.stream().map(s -> "{" + s + "}").collect(Collectors.joining(","));
 "list":[
	"小王",
	"小刘",
	"小张",
	"小胡"
       ]

// 打印  name = "{小王},{小刘},{小张},{小胡}"