Exception in thread "main" java.util.NoSuchElementException at java.util.ArrayList$Itr.next(Unknown

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源码：

public static void printEmployeeInfo(List<Map<String, Object>> list) {
		for(Iterator<Map<String, Object>> it = list.iterator(); it.hasNext();) {
			System.out.print(it.next().get("ID")+"\t");
			System.out.print(it.next().get("姓名")+"\t");
			System.out.print(it.next().get("薪水")+"\t");
			System.out.print(it.next().get("单位")+"\t");
			System.out.println(it.next().get("入职时间"));
		}
	}

报错的原因是：每调用一次it.next()，则记录的“指针”便会指向下一条。所以需要定义一个局部变量来接收一下。
解决办法：

public static void printEmployeeInfo(List<Map<String, Object>> list) {
		for(Iterator<Map<String, Object>> it = list.iterator(); it.hasNext();) {
			Map<String, Object> map = it.next();
			System.out.print(map.get("ID")+"\t");
			System.out.print(map.get("姓名")+"\t");
			System.out.print(map.get("薪水")+"\t");
			System.out.print(map.get("单位")+"\t");
			System.out.println(map.get("入职时间"));
		}
	}