I have a JSON String as below:
"{ \"password\":\"des123\",\"ROU_DATA\":[{\"FORM_RECEIVING_TIME\":\"12:00:00\",\"REMARKS\":\"Redemption of Unit\"}, {\"FORM_RECEIVING_TIME\":\"13:00:00\",\"REMARKS\":\"sALE of Unit\"}] }";
Now I want to extract the Array from it and need to use it as a separate pojo class so that I can iterate over each value..
Now the problem is, when I try to convert the complete String to Map and get the Array value from the map.. It transforms its format to MAp format like:
{FORM_RECEIVING_DATE = 12:00:00, etc..}
However json string should be {"FORM_RECEIVING_DATE": "12:00:00", etc..}
due to the MAp format its now allowing me to parse it using my POJO Class..
Please help to convert it to my JSONFormat ...
**NOTE: Please note that I can only use Jackson **.
CLASS A
ObjectMapper mapper2 = new ObjectMapper();
Map<String, Object> map;
map = mapper2.readValue(json, new TypeReference<Map<String, Object>>(){});
System.out.println("map: " + map.get("ROU_DATA") );
String array = map.get("ROU_DATA").toString();
String json2 = new ObjectMapper().writeValueAsString(array.replace("[", "").replace("]", ""));
String json3 = new ObjectMapper().writeValueAsString(json2);
System.out.println("json2>>" + json2);
System.out.println("json2>>" + json3);
mapper.configure(JsonParser.Feature.ALLOW_UNQUOTED_FIELD_NAMES, true);
// 1. convert JSON array to Array objects
ROU[] pp1 = mapper.readValue("{" + array.replace("=", ":") + "}", ROU[].class);
for (ROU person : pp1) {
System.out.println(person.getRemarks());
}
CLASS B
import com.fasterxml.jackson.annotation.JsonProperty;
public class ROU {
@JsonProperty("FORM_RECEIVING_TIME")
private String formdate;
@JsonProperty("REMARKS")
private String remarks;
public String getFormdate() {
return formdate;
}
public void setFormdate(String formdate) {
this.formdate = formdate;
}
public String getRemarks() {
return remarks;
}
public void setRemarks(String remarks) {
this.remarks = remarks;
}
}
map.get("ROU_DATA")
returns a List
object, and the toString()
method of List
does not read JSON text.
You don't need to convert back to a JSON text just to get the ROU[]
created, just call convertValue(...)
.
String input = "{ \"password\":\"des123\",\"ROU_DATA\":[{\"FORM_RECEIVING_TIME\":\"12:00:00\",\"REMARKS\":\"Redemption of Unit\"}, {\"FORM_RECEIVING_TIME\":\"13:00:00\",\"REMARKS\":\"sALE of Unit\"}] }";
ObjectMapper mapper2 = new ObjectMapper();
Map<?, ?> json = mapper2.readValue(input, Map.class);
ROU[] pp1 = mapper2.convertValue(json.get("ROU_DATA"), ROU[].class);
for (ROU person : pp1)
System.out.println(person.getRemarks());
Output
Redemption of Unit
sALE of Unit