中间方法和终结方法 以下传入参数均表示lambda表达式中的参数 forEach():遍历集合,对流中的每个元素执行指定的操作 ArrayList<String> list = new ArrayList<>(Arrays.asList("a","b","c","d"));list.stream().forEach(s-> System.out.println());void forEac
To work with Event Time, streaming programs need to set the time characteristic accordingly. 首先配置成,Event Time final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnviron