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[英]how to iterate Map<String, List<Map<String, Object>>> in java?
[英]How to add Map<String, string> into Map<String, List<Object>> in java
public Map<String, List<PatientInfo>> getPatients(String sendingApplication,String sendingFacility) {
// TODO Auto-generated method stub
Map<String, List<PatientInfo>> patientMap = null;
List<PatientInfo> patientList = null;
patientMap = new HashMap<String, List<PatientInfo>>();
patientList = new ArrayList<PatientInfo>();
try {
PatientInfoDAO patientInfoDAO = new PatientInfoDAOImpl();
ItemCollection<QueryOutcome> items = patientInfoDAO.getPatients(sendingApplication, sendingFacility);
for(Item item : items){
PatientInfo patient = new PatientInfo();
patient.setAdministrativeSex(item.getString(""));
patient.setFamilyName(item.getString("FAMILYNAME"));
patient.setGivenName(item.getString("GIVENNAME"));
patient.setAdmitDateOrTime(item.getString("GENDER"));
patient.setAssignedPatientLocationBuilding(item.getString("USERNAME"));
patient.setAssignedPatientLocationFloor(item.getString("PASSWORD"));
patient.setAssignedPatientLocationPersonLocationType(item.getString("USERROLE"));
patient.setAssignedPatientLocationRoom(item.getString("USERSTATUS"));
patient.setAsssignedPatientLocationBed(item.getString("EMAIL"));
patient.setAttendingDoctor(item.getString("EMROPERATOR"));
patient.setClientId(item.getString("clientId"));
patient.setDateOrTimeOfMessage(item.getString("dateOrTimeOfMessage"));
patient.setDischargeDateOrTime(item.getString("dischargeDateOrTime"));
patient.setDob(item.getString("dob"));
patient.setEventOccuredTime(item.getString("eventOccuredTime"));
patient.setImageUrl(item.getString("imageUrl"));
patient.setLastModifiedOn(item.getString("lastModifiedOn"));
patient.setMessageControlId(item.getString("messageControlId"));
patient.setNrPatientId(item.getString("nrPatientId"));
patient.setPatientId(item.getString("patientId"));
patient.setPatientStatus(item.getString("patientStatus"));
patient.setPriorPatientLocationBed(item.getString("priorPatientLocationBed"));
patient.setPriorPatientLocationBuilding(item.getString("priorPatientLocationBuilding"));
patient.setPriorPatientLocationFloor(item.getString("priorPatientLocationFloor"));
patient.setPriorPatientLocationPersonLocationType(item.getString("priorPatientLocationPersonLocationType"));
patient.setPriorPatientLocationPointOfCare(item.getString("priorPatientLocationPointOfCare"));
patient.setPriorPatientLocationRoom(item.getString("priorPatientLocationRoom"));
patient.setReceivingFacility(item.getString("receivingFacility"));
patient.setRecevingApplication(item.getString("recevingApplication"));
patient.setSendingApplicaation(item.getString("sendingApplicaation"));
patient.setSendingFacility(item.getString("sendingFacility"));
patientList.add(patient);
}
String date = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
patientMap.put("PATIENTLIST", patientList);
patientMap.put("LASTKEY", date);
return patientMap;
}catch(AmazonServiceException ase){
throw new RuntimeException("internalServerError");
}catch(AmazonClientException ase){
throw new RuntimeException("internalServerError");
}
}
在这种情况下,我无法在Map>中添加日期字符串?
您正在尝试在地图需要List的位置放置一个字符串。
代替:
patientMap.put("PATIENTLIST", patientList);
patientMap.put("LASTKEY", date);
地点:
patientMap.put(date, patientList);
使用日期字符串为关键且患者列表为值的地图,您可以快速获取给定日期的患者列表。
如果要使用地图以字符串形式保存对象的日期和列表,则必须将这些字符串转换回其原始日期或患者对象列表。
如果这真的是你想要的,我建议你研究一下java对象的序列化和反序列化 。
以下是您可以执行的小改动(绝对必须更改返回类型):
public Map<String, PatientMapObject> getPatients(String sendingApplication,String sendingFacility) {
// TODO Auto-generated method stub
Map<String, PatientMapObject> patientMap = null;
List<PatientInfo> patientList = null;
patientMap = new HashMap<String, PatientMapObject>();
patientList = new ArrayList<PatientInfo>();
try {
PatientInfoDAO patientInfoDAO = new PatientInfoDAOImpl();
ItemCollection<QueryOutcome> items = patientInfoDAO.getPatients(sendingApplication, sendingFacility);
for(Item item : items){
PatientInfo patient = new PatientInfo();
patient.setAdministrativeSex("Male");
patientList.add(patient);
}
String date = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
PatientMapObject pmo = new PatientMapObject();
pmo.setPatientList(patientList);
pmo.setPDate(date);
patientMap.put("PATIENTLIST", pmo);
return patientMap;
}catch(Exception ase){
throw new RuntimeException("internalServerError");
}
}
class PatientMapObject{
private List<PatientInfo> patientList;
private String pdate;
public void setPDate(String pdate) {
this.pdate = pdate;
}
public void setPatientList(List<PatientInfo> patientList) {
this.patientList = patientList;
}
//getters
}
您只能在Map
的定义中添加定义的对象类型(即List<PatientInfo>
因为您正在创建Map<String, List<PatientInfo>>
等Map<String, List<PatientInfo>>
)以添加String,您还应该使用Map<String,Object>
正如我的评论中所提到的,您可以使用Map<String, Object>
类型的Map<String, Object>
来保存患者列表和日期。 该解决方案的问题在于
Map<String, Object> patientData = new HashMap<>();
patientData.put("LASTKEY", date);
String lastKey = (String) patientData.get("LASTKEY");
为了避免这一切,我认为这是最惯用的Java解决方案:创建一个PatientData
类来保存您的PatientInfo
项目列表,以及您想要存储的其他日期:
public class PatientData {
private List<PatientInfo> patientList = new ArrayList<>();
private Date lastKey; // or better still, use one of the Java 8 date classes
// getters and setters...
}
这样可以保证类型安全,并消除密钥名称中拼写错误的风险以及对铸造的需求:
PatientData patientData = new PatientData();
patientData.setLastKey(new Date());
Date date = patientData.getLastKey();
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