java中实体类和JSON对象之间相互转化

在需要用到JSON对象封装数据的时候，往往会写很多代码，也有很多复制粘贴，为了用POJO的思想我们可以装JSON转化为实体对象进行操作

package myUtil;
 
import java.io.IOException;
 
import myProject.Student;
import myProject.StudentList;
 
import org.codehaus.jackson.map.ObjectMapper;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class JSonUtil {
  
  public static Object JSonToObj(String jsonStr,Class obj) {
    T t = null;
    try {
      ObjectMapper objectMapper = new ObjectMapper();
      t = objectMapper.readValue(jsonStr,
   obj);
    } catch (Exception e) {
      e.printStackTrace();
    }
    return t;
  }
  
  public static JSonObject 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 new JSonObject(jsonStr);
  }
  public static void main(String[] args) throws JSONException, IOException {
    JSonObject obj = null;
    obj = new JSonObject();
    obj.put("name", "213");
    obj.put("age", 27);
    JSonArray array = new JSonArray();
    array.put(obj);
    obj = new JSonObject();
    obj.put("name", "214");
    obj.put("age", 28);
    array.put(obj);
    Student stu = (Student) JSonToObj(obj.toString(), Student.class);
    JSonObject objList = new JSonObject();
    objList.put("student", array);
    System.out.println("objList:"+objList);
    StudentList stuList = (StudentList) JSonToObj(objList.toString(), StudentList.class);
    System.out.println("student:"+stu);
    System.out.println("stuList:"+stuList);
    System.out.println("#####################################");
    JSonObject getObj = objectToJson(stu);
    System.out.println(getObj);
  }
}

以上所述就是本文的全部内容了，希望大家能够喜欢。