Two methods for entity class to Json in java
- 2020-05-27 05:40:31
- OfStack
First declare the required jar package:
ezmorph-1.0.6.jar jackson-all-1.7.6.jar jsoup-1.5.2.jar
1. Create an entity class Emp.
package com.hyx.entity;
public class Emp {
private Integer id;
private String name;
private Integer dptNo;
private String gender;
private String duty;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getDptNo() {
return dptNo;
}
public void setDptNo(Integer dptNo) {
this.dptNo = dptNo;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getDuty() {
return duty;
}
public void setDuty(String duty) {
this.duty = duty;
}
}
2. Entity class conversion to Json
(1)
import java.io.IOException;
import net.sf.json.JSONObject;
import org.apache.struts2.json.JSONException;
import org.codehaus.jackson.map.ObjectMapper;
import com.hyx.entity.Emp;
public class MainTest {
public static<T> String objectToJson(T obj) throws JSONException, IOException {
ObjectMapper mapper = new ObjectMapper();
// Convert object to JSON string
String jsonStr = "";
try {
jsonStr = mapper.writeValueAsString(obj);
} catch (IOException e) {
throw e;
}
return JSONObject.fromObject(obj).toString();
}
// The main function
public static void main(String[] args) {
Emp emp=new Emp();
emp.setId(1);
emp.setName(" zhang 3");
emp.setGender(" male ");
emp.setDptNo(001);
emp.setDuty(" clerk ");
String jsonStr="";
try {
jsonStr=objectToJson(emp);
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
System.out.println(jsonStr);
}
}
(2)
import net.sf.json.JSONObject;
import com.hyx.entity.Emp;
public class MainTest {
// The main function
public static void main(String[] args) {
Emp emp=new Emp();
emp.setId(1);
emp.setName(" zhang 3");
emp.setGender(" male ");
emp.setDptNo(001);
emp.setDuty(" clerk ");
JSONObject jsonObject = JSONObject.fromObject(emp);
System.out.println(jsonObject);
}
}