英文:
using mulit thread with spring boot
问题
我正在使用Spring Boot开发一个项目。
如果我创建一个类像这样，线程不起作用。
DAO按顺序工作。
示例（1.2.3.4.5.....100）
服务类
for(int i = 1; i <= 30; j++) {
threadServiceMethod(i);
}
ThreadService类
@Async
public CompletableFuture<List<DTO>> threadServiceMethod(int i) {
return CompletableFuture.completedFuture(DAO方法);
}
DAO类
public List<Dto> daoMethod() {
//选择代码
}
但是，如果将@Async连接到daoMethod，它会起作用。
但是，客户端接收到的结果值是null。
ThreadService类
public CompletableFuture<List<DTO>> threadServiceMethod(int i) {
return CompletableFuture.completedFuture(DAO方法);
}
DAO类
@Async
public List<Dto> daoMethod() {
//选择代码
}
如果对threadmethod和dao使用@Async，日志将按顺序输出。
为什么会这样工作呢？
帮帮我 
英文:
I am working on a project using Spring Boot.
If I create a class like this the thread doesn't work.
DAO works sequentially.
example (1.2.3.4.5.....100)
Service class
for(int i = 1; i <= 30; j++) {
threadServiceMethod(i);
}
ThreadService class
@Async
public CompletableFuture<List<DTO>> threadServiceMethod(int i) {
return CompletableFuture.completedFuture(DAO method);
}
DAO class
public List<Dto> daoMethod() {
//select code
}
But It works if @Async is connected to daoMethod
However, the result value that the client receives is null.
ThreadService class
public CompletableFuture<List<DTO>> threadServiceMethod(int i) {
return CompletableFuture.completedFuture(DAO method);
}
DAO class
@Async
public List<Dto> daoMethod() {
//select code
}
If @async is used for threadmethod and dao, logs are output sequentially.
Why does it work like this??
help me
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