是否有HashMap连接元素

Question

是否有一个简单的函数将所有元素和键值连接到String

Map<String, String> m = new HashMap<String, String>();
m.put("lebron", "james");
m.put("kevin", "durant");

m.join(",")应该产生:"lebronjames,kevindurant"

我正在寻找一个更简单(更简洁)的解决方案,使用guava或apache common(StringUtils)Java库,而不是迭代地图

Answer 1

使用Google guava-libraries:

Map<String, String> m = new HashMap<String, String>(); 
m.put("lebron", "james");
m.put("kevin", "durant");

Joiner.MapJoiner joiner = Joiner.on(",").withKeyValueSeparator("");
System.out.println(joiner.join(m));  // return lebronjames,kevindurant