Map key值重复自动覆盖【基础】

eg,

Map<String, Object> Map_= new LinkedHashMap<String, Object>();

if(addressType==1){

for(Map<String, Object> foreach:orderInfos){

Map<String,Object>map1=newHashMap<String,Object>();

map1.put("1",foreach.get("1A"));

map1.put("2",foreach.get("2A"));

map1.put("3",foreach.get("3A"));

map1.put("4",foreach.get("4A"))；

map1.put("5",foreach.get("5A"));

map1.put("6",foreach.get("6A"));

map1.put("7",foreach.get("7A"));

Map_.put(String.valueOf(foreach.get("4A"))+foreach.get("5A"),map1);

//其作用为覆盖map1中重复的数据

} }

转载于:https://my.oschina.net/u/3377023/blog/879735