Map<String,Object> map = new HashMap<>(); map.put("name","张三1号"); map.put("age",1);; list.add(map); List<Map<String, Object>> res = list.stream().distinct().collect(Collectors.toList()); 1. 2. 3. 4. 5. map(映射,重构。对原集合的元素进行操作,生成一个新集合):...
Map<String, Object> res = new HashMap<String, Object>(); for (Map<String, Object> map : list) { String id = map.get("id").toString(); String value = map.get("value").toString(); if (res.containsKey(id)) { String oldVal = res.get(id).toString(); value = oldVal + ","...
遍历<List<Map<String,Object>>>数据结构的两种方法 packagecom.test;importjava.util.ArrayList;importjava.util.HashMap;importjava.util.List;importjava.util.Map;importjava.util.Map.Entry;publicclassPrintList {publicstaticvoidmain(String[] args) { List<Map<String,Object>> list =newArrayList(); Map<S...
Map<String,Object> map =newHashMap<>(); map.put("res",res); map.put("res2",res2);returnAjaxResult.success(map); } 返回结果
> res = repository.findAll(input);returnres; }privateMap<String, DataTablesRepository>createMap(){ Map<String, DataTablesRepository> myMap =newHashMap<String, DataTablesRepository>(); myMap.put("continenti",this.continentiDtRepository);
public static void main(String[] args) { List<Map<String,Object>> list = new ArrayList();Map<String,Object> map = new HashMap();map.put("empid", "111");map.put("empid2", "222");map.put("empid3", "333");list.add(map);printList2(list);} /** * ⽅法⼀：* 遍历List<...
一些骚操作需要批量处理某些对象的属性和值(Object转Map)。 /** * 根据属性名获取属性元素,包括各种安全范围和所有父类 * */publicstaticMap<String,Object>getFieldByClasss(Object object){Classclazz=object.getClass();Map<String,Object>resutlMap=newLinkedHashMap<String,Object>();for(;clazz!=Object.cla...
2.mapper.java中,map的value泛型为Object @Repositorypublic interfaceTAppoinTmentMapperextendsBaseMapper<TAppoinTment>{List<HashMap<String,Object>>selectappointTms(QueryAppointmentListReq req);} 3.在java类中,转换成map代码如 List<HashMap<String,Object>>hashMapList=mapper.selectappointTms(req);HashMap<Strin...
res8: Int = 6 scala> def test2(x:Int,y:Int){ | println(x * y)} test2: (x: Int, y: Int)Unit scala> test2(2,3) 6 //没有返回值,是print出来的 对于递归方法,必须指定返回类型 object digui { def main(args: Array[String]): Unit = { ...
String[]args)throwsException{demo();}}很简单，然后我们使用javac编译，将其放到vmware 调试的eclipse...