public Map<String, String> test() throws InterruptedException, ExecutionException {
// 不存在并发插入情况,不需要使用ConcurrentHashMap
// Map<String, String> data = new ConcurrentHashMap<>(3);
Map<String, String> data = new HashMap<>(3);
//第一个任务。返回参数类型可自定义
CompletableFuture<String> task01 = CompletableFuture.supplyAsync(() -> {
try {
TimeUnit.SECONDS.sleep(3);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "task01";
});
//第二个任务。返回参数类型可自定义
CompletableFuture<String> task02 = CompletableFuture.supplyAsync(() -> {
try {
TimeUnit.SECONDS.sleep(5);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "task02";
});
// 第三个任务。返回参数类型可自定义
CompletableFuture<String> task03 = CompletableFuture.supplyAsync(() -> {
try {
TimeUnit.SECONDS.sleep(3);
} catch (InterruptedException e) {
e.printStackTrace();
}
return "task03";
});
// get()方法会阻塞,最终得到处理时间,取决于多线程的最大响应时间的接口
String task01Result = task01.get() ;
String task02Result = task02.get() ;
String task03Result = task03.get() ;
data.put("task01", task01Result );
data.put("task02", task02Result );
data.put("task03", task03Result );
return data;
}
CompletableFuture执行多个异步任务,将结果合并返回
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转载自blog.csdn.net/yexiaomodemo/article/details/130063913
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