Map<String, Object> mapMin = listMap.stream().min((v1, v2) -> ((BigDecimal) v1.get("height")).compareTo((BigDecimal) v2.get("height"))).orElse(null); List<Map<String,Object>> 分组 Map<String, List<Map<String, Object>>> mapGroup = listMap.stream().collect(Collectors.groupingB...
List<Map<String, Object>> result =newArrayList<Map<String,Object>>(forcaseResulMap.values());//对list根据里面的map结构的key为time的字段进行排序result=result.stream().sorted((map1,map2)->{returnmap1.get("time").toString().compareTo(map2.get("time").toString()); }).collect(Collectors.t...
Map<String, Object> map2 = new HashMap<>(); map2.put("key3", value3); map2.put("key4", value4); list2.add(map2); 代码语言:txt 复制 使用流连接两个列表。可以使用Stream类的concat方法将两个列表合并为一个流,然后进行后续操作。例如:Stream<Map<String, Object>> combinedStream = ...
//根据工号进行分组 List<Map<String, Object>> dataList = ((PageResult<Map<String, Object>>) tuple.e2).getItems(); Map<String, List<Map<String, Object>>> groupByEmpId= dataList.stream().collect( groupingBy(map -> map.get("emp_id").toString())); List<Map<String, Object>>排序 //...
Set<Map.Entry<String, List<Map<String, Object>>> entries = dataList.stream() .collect(Collectors.groupingBy(x -> x.get("code") + "_" + x.get("value") + "_" + x.get("name"))).entrySet(); //分组 1. 1.
根据map的name进行分组,并将name相同的score值求和 代码语言:javascript 复制 List<Map<String,Object>>collectList=list.stream().collect(Collectors.groupingBy(e->e.get("name"))).values().stream().map(e->{Map<String,Object>map=e.get(0);map.put("score",e.stream().map(s->newBigInteger(s.ge...
package test2;importjava.util.*;importjava.util.stream.Collectors;publicclassFenzu{publicstaticvoidmain(String[]args){Map<String,Object>map=newHashMap<String,Object>();map.put("name","a");map.put("price",500);Map<String,Object>map2=newHashMap<String,Object>();map2.put("name","a");...
Map<String, Object> map = new HashMap<String, Object>(); map.put("name", "ZK"); map.put("age", 13); Map<String, Object> map2 = new HashMap<String, Object>(); map2.put("name", "ZA"); map2.put("age", 15); Map<String, Object> map3 = new HashMap<String, Object>()...
*/ public class Ripper { public static void main(String[] args) { Map<String, Object> map = new HashMap<String, Object>(); map.put("name", "ZK"); map.put("age", 13); Map<String, Object> map2 = new HashMap<String, Object>(); map2.put("name", "ZA"); map2.put("age"...
java List分组为Map Id相同的数据分到一个数组。key为id Map<String,List<Object>>groups=list.stream().collect(Collectors.groupingBy(s->s.getId());