foreach 不适用于类型“java.lang.String”

Question

我正在尝试将数据库中的列表中的项目作为行中的单个值插入。如何遍历发送的有效负载并将所有项目插入到单独的行中？我试图寻找没有运气的例子。我无法循环并在数据库中插入值。

这是有效载荷

{"labsigned":["234568","234567","2345678","2344556","12335677","2345677","234556","234545"]}

我的控制器

@RequestMapping(path = "/labreport/createrordispatched", method = RequestMethod.POST)
public ResponseEntity<?> createDispatched(@RequestBody Dispatched dispatched){
    if(labDashboardService.createDispatched(dispatched)) {
        return ResponseEntity.status(HttpStatus.CREATED).body(true);
    }

    return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(false);
}

我的服务

public boolean createDispatched(Dispatched dispatched) {
    List<Dispatched> newTickets = new ArrayList<>();

    dispatched.setCreatedBy(getCurrentUserEmail());
    dispatched.setDateCreated(System.currentTimeMillis());

    for(String labsigned:dispatched.getlabsigned()){
        Dispatched ticket = new Dispatched(
                dispatched.getCreatedBy(),
                dispatched.getDateCreated(),
                labsigned
        );
        newTickets.add(ticket);
    }
    dispatchedRepository.saveAll(newTickets);
    return true;
}

我的模特

@Entity
@Table(name = "DISPATCHED")
public class Dispatched {
    private String id;
    private String labsigned;
    private Long dateCreated;
    private String createdBy;

    public Dispatched(){}
    public Dispatched(String createdBy, Long dateCreated, String labsigned){
        this.labsigned = rorlabsigned;
        this.dateCreated = dateCreated;
        this.createdBy = createdBy;

    }
//getters and setters

给我错误的那一行

  for(String rorlabsigned:dispatched.getRorlabsigned())

我应该如何设置我的实体以接受数组？

Answer 1

将您的 labsigned 字段声明为 Set 或使用 String.split like：

for(String rorlabsigned : dispatched.getRorlabsigned().split(",")) { ... }

Answer 2

错误消息表明您的 getter dispatched.getRorlabsigned() 没有返回 Collection。它改为返回一个 String。您不能使用foreach 循环遍历String。我想你需要一个Set<String> 那里。尝试重构那部分代码。