英文:
How to pass ArrayList to JPA repository method from lambda expression?
问题
这里有一个实体类：
public class Call {
private String uniqId;
private String gwNumber;
}
字符串行：
String line = "qwe-123,10\nrty-345,15\nasd-567,17";
使用"\n"来分隔每个实体的数据：
Arrays.stream(result.split("\n"))
.forEach(
s -> {
String[] callFields = s.split(",");
Call call = new Call();
call.setUniqId(callFields[0]);
call.setGwNum(callFields[1]);
List<Call> callList = new ArrayList<>();
callList.add(call);
}
);
如何将callList传递给JPA repository.saveAll(callList)方法？
英文:
There is entity class:
public class Call {
private String uniqId;
private String gwNumber;
}
String line = "qwe-123,10\nrty-345,15\nasd-567,17";
Arrays.stream(result.split("\n")) // "\n" is used to separate data for each entity
.forEach(
s-> {
String[] callFields = s.split(","); // "," is used to separate data for each filed of entity
Call call = new Call();
call.setUniqId(callFields[0]);
call.setGwNum(callFields[1]);
List<Call> callList = new ArrayList<>();
callList.add(call);
}
);
How to pass callList to JPA repository.saveAll(callList) method ?
答案1
得分: 1
我认为你应该忘记从Stream中调用某物。我不是说这是不可能的，但这并不推荐。
class Call {}
List<Call> callList = Arrays.stream(result.split("\n"))
.map(s -> {
Call call = new Call();
// ...
return call;
})
.collect(Collectors.toList());
List<Call> callList 可以写入数据库。
英文:
I think you should forget to call smth. from Steram. I do not say this is impossible, but it's not recommended.
class Call {}
List<Call> callList = Arrays.stream(result.split("\n"))
.map(s -> {
Call call = new Call();
// ...
return call;
})
.collect(Collectors.toList());
List<Call> callList could be written into DB.
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