实体类和JSON对象之间相互转化代码,PHP代码库,德仔网

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【PHP】实体类和JSON对象之间相互转化

作者:cqwck / 发布于2015/5/19/ 563

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;
	/**
	* 实体类和JSON对象之间相互转化（依赖包jackson-all-1.7.6.jar、jsoup-1.5.2.jar）
	* @author wck
	*
	*/
	public class JSONUtil {
	 /**
	 * 将json转化为实体POJO
	 * @param jsonStr
	 * @param obj
	 * @return
	 */
	 public static<T> Object JSONToObj(String jsonStr,Class<T> obj) {
	 T t = null;
	 try {
	 ObjectMapper objectMapper = new ObjectMapper();
	 t = objectMapper.readValue(jsonStr,
	 obj);
	 } catch (Exception e) {
	 e.printStackTrace();
	 }
	 return t;
	 }
	
	 /**
	 * 将实体POJO转化为JSON
	 * @param obj
	 * @return
	 * @throws JSONException
	 * @throws IOException
	 */
	 public static<T> 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);
	 }
	}

	

	

	package myProject;
	
	public class Student {
	 private String name;
	 private int age;
	 //private StudentClass studentClass;
	 public String getName() {
	 return name;
	 }
	 public void setName(String name) {
	 this.name = name;
	 }
	 public int getAge() {
	 return age;
	 }
	 public void setAge(int age) {
	 this.age = age;
	 }
	 @Override
	 public String toString() {
	 return "Student [name=" + name + ", age=" + age + "]";
	 }
	}

	

	package myProject;
	
	import java.util.List;
	
	public class StudentList {
	 List<Student> student;
	 public List<Student> getStudent() {
	 return student;
	 }
	
	 public void setStudent(List<Student> student) {
	 this.student = student;
	 }
	
	 @Override
	 public String toString() {
	 return "StudentList [student=" + student + "]";
	 }
	}

试试其它关键字

　实体类　　 JSON　

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