Java：如何以原子方式替换Map中的所有值？

使用CAS的方法

AtomicReference

AtomicReference<Map<String, String>> workingMapRef = new AtomicReference<>(new HashMap<>());

该映射可以是并发的，但是对于“批量更新”它是只读的。然后

updateState

doUpdateState()

void updateState() {    while (!doUpdateState());}boolean doUpdateState() {    Map<String, String> workingMap = workingMapRef.get();    //copy map content    Map<String, String> newState = new HashMap<>(workingMap); //you can make it concurrent    newState.put("b", "b1");    newState.put("c", "c2");    newState.put("d", "d1");    return workingMapRef.compareAndSet(workingMap, newState);}