Amit Gawali :
I am trying to build RESTful web service with Spring support. I am getting following exception when I am trying to send POST request.
Input:
POST http://localhost:8080/InventoryDemo/item
In JSON Payload:
{"materialId":"ID02","materialName":"Material_2","materialCategory":"LIQUID","currency":"RUPEES","unitCostInCurrency":2200.0,"quantityLevel":1000,"quantityAtDate":"2016-04-11","warehouseName":"WareHouse_2"}
Exception:
WARNING: Handler execution resulted in exception: Could not read document: Can not instantiate value of type [simple type, class java.time.LocalDate] from String value ('2016-04-11'); no single-String constructor/factory method
at [Source: java.io.PushbackInputStream@378ace07; line: 1, column: 146] (through reference chain: com.psl.inventory.model.InventorySystemModel["quantityAtDate"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not instantiate value of type [simple type, class java.time.LocalDate] from String value ('2016-04-11'); no single-String constructor/factory method
at [Source: java.io.PushbackInputStream@378ace07; line: 1, column: 146] (through reference chain: com.psl.inventory.model.InventorySystemModel["quantityAtDate"])
This is my POST method from @RestController:
@RequestMapping(value = "/item", method = RequestMethod.POST)
public ResponseEntity<Void> createInventorySystemModel(@RequestBody InventorySystemModel inventorySystemModel, UriComponentsBuilder ucBuilder) {
System.out.println("Creating InventorySystemModel " + inventorySystemModel.getMaterialName());
if (inventorySystemService.isInventorySystemModelExist(inventorySystemModel)) {
System.out.println("A InventorySystemModel with name " + inventorySystemModel.getMaterialName() + " already exist");
return new ResponseEntity<Void>(HttpStatus.CONFLICT);
}
inventorySystemService.saveInventoryItem(inventorySystemModel);
HttpHeaders headers = new HttpHeaders();
headers.setLocation(ucBuilder.path("/user/{materialId}").buildAndExpand(inventorySystemModel.getMaterialId()).toUri());
return new ResponseEntity<Void>(headers, HttpStatus.CREATED);
}
and this is my POJO class:
public class InventorySystemModel {
private String materialId;
private String materialName;
private String materialCategory;
private String currency;
private double unitCostInCurrency;
private int quantityLevel;
private LocalDate quantityAtDate;
private String warehouseName;
public InventorySystemModel(){
}
public InventorySystemModel(String materialId, String materialName,
String materialCategory, String currency,
double unitCostInCurrency, int quantityLevel, LocalDate quantityAtDate,
String warehouseName) {
super();
this.materialId = materialId;
this.materialName = materialName;
this.materialCategory = materialCategory;
this.currency = currency;
this.unitCostInCurrency = unitCostInCurrency;
this.quantityLevel = quantityLevel;
this.quantityAtDate = quantityAtDate;
this.warehouseName = warehouseName;
}
public String getMaterialId() {
return materialId;
}
public void setMaterialId(String materialId) {
this.materialId = materialId;
}
public String getMaterialName() {
return materialName;
}
public void setMaterialName(String materialName) {
this.materialName = materialName;
}
public String getMaterialCategory() {
return materialCategory;
}
public void setMaterialCategory(String materialCategory) {
this.materialCategory = materialCategory;
}
public String getCurrency() {
return currency;
}
public void setCurrency(String currency) {
this.currency = currency;
}
public double getUnitCostInCurrency() {
return unitCostInCurrency;
}
public void setUnitCostInCurrency(double unitCostInCurrency) {
this.unitCostInCurrency = unitCostInCurrency;
}
public int getQuantityLevel() {
return quantityLevel;
}
public void setQuantityLevel(int quantityLevel) {
this.quantityLevel = quantityLevel;
}
public LocalDate getQuantityAtDate() {
return quantityAtDate;
}
public void setQuantityAtDate(LocalDate quantityAtDate) {
this.quantityAtDate = quantityAtDate;
}
public String getWarehouseName() {
return warehouseName;
}
public void setWarehouseName(String warehouseName) {
this.warehouseName = warehouseName;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result
+ ((currency == null) ? 0 : currency.hashCode());
result = prime
* result
+ ((materialCategory == null) ? 0 : materialCategory.hashCode());
result = prime * result
+ ((materialId == null) ? 0 : materialId.hashCode());
result = prime * result
+ ((materialName == null) ? 0 : materialName.hashCode());
result = prime * result
+ ((quantityAtDate == null) ? 0 : quantityAtDate.hashCode());
result = prime * result + quantityLevel;
long temp;
temp = Double.doubleToLongBits(unitCostInCurrency);
result = prime * result + (int) (temp ^ (temp >>> 32));
result = prime * result
+ ((warehouseName == null) ? 0 : warehouseName.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
InventorySystemModel other = (InventorySystemModel) obj;
if (currency == null) {
if (other.currency != null)
return false;
} else if (!currency.equals(other.currency))
return false;
if (materialCategory == null) {
if (other.materialCategory != null)
return false;
} else if (!materialCategory.equals(other.materialCategory))
return false;
if (materialId == null) {
if (other.materialId != null)
return false;
} else if (!materialId.equals(other.materialId))
return false;
if (materialName == null) {
if (other.materialName != null)
return false;
} else if (!materialName.equals(other.materialName))
return false;
if (quantityAtDate == null) {
if (other.quantityAtDate != null)
return false;
} else if (!quantityAtDate.equals(other.quantityAtDate))
return false;
if (quantityLevel != other.quantityLevel)
return false;
if (Double.doubleToLongBits(unitCostInCurrency) != Double
.doubleToLongBits(other.unitCostInCurrency))
return false;
if (warehouseName == null) {
if (other.warehouseName != null)
return false;
} else if (!warehouseName.equals(other.warehouseName))
return false;
return true;
}
@Override
public String toString() {
return "InventorySystemModel [materialId=" + materialId
+ ", materialName=" + materialName + ", materialCategory="
+ materialCategory + ", currency=" + currency
+ ", unitCostInCurrency=" + unitCostInCurrency
+ ", quantityLevel=" + quantityLevel + ", quantityAtDate="
+ quantityAtDate + ", warehouseName=" + warehouseName + "]";
}
}
FYI: I did checked this post but not getting clue like where exactly I need to do modification.
I am using Java 8 and Spring 4.2
Can some one please explain in detail like what exactly I need to do here. Also I want same date format when I will hit GET request.
Thanks.
SachinSarawgi :
You can make your Custom LocalDate Deserializer. This Deserializer will be called when setter method for the LocalDate variable is called.
Steps as follows:
Define a Custom Deserializer
public class LocalDateDeserializer extends JsonDeserializer<LocalDate>{ @Override public LocalDate deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JsonProcessingException { DateTimeFormatter formatter = DateTimeFormatter.ofPattern("required format"); LocalDate localDate = null; localDate = LocalDate.parse(p.getText(), formatter); return localDate; } }
Note: Reference for LocalDate.parse method.
Define @JsonDeserialize annotation above the variable
@JsonDeserialize(using=LocalDateDeserializer.class) private LocalDate quantityAtDate;
For using @JsonDeserialize annotation import following:
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
Hope this helps.
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