使用Java 反射,对类中成员变量赋值.将Json对像转为

Android 开发中经常需要与Intenet通信获取数据 ,中间交换格式,大家都喜欢Json, 如何将Json对像转为Java的对像? 一个个属性来解析可以实现,但对我来说这样做太土了.

通过Java的反射可以很方便,高效,易读的实现

先看一个Json对像

{  "content":[{
 "level":1,
  "status":"2",
  "businessLicence":true,
  "hygieneLicence":true,
  "note":"note1",
  "enterprise":"free",
  "principal":"老韩",
  "phone":"13366350377",
  "time":1380862998588,
  "address":"bj aa",
  "latitude":38.112,
  "longitude":116.002
      }
,{
 "level":2,
  "status":"3",
  "businessLicence":false,
  "hygieneLicence":false,
  "note":"note22222222222222222222222",
  "enterprise":"鹏程万里",
  "principal":"韩工",
  "phone":"13366350377",
  "time":1380962998588,
  "address":"bj aa",
  "latitude":38.112,
  "longitude":116.002
}
,{
 "level":3,
  "status":"4",
  "businessLicence":true,
  "hygieneLicence":false,
  "note":"海天3 note333333333333333333333333333",
  "enterprise":"csdn",
  "principal":"韩工",
  "phone":"13366350377",
  "time":1380943998588,
  "address":"bj aa",
  "latitude":38.112,
  "longitude":116.002
}]
}

一个Json对像

对应的 Java对像

public class Content {

private int level;
 private String status;
 private boolean businessLicence;
 private boolean hygieneLicence;
 private String note;//
 private String enterprise;
 private String principal;
 private long time;
 private String address;
 private double latitude;
 private double longitude;
 private String phone;

private final String[] properties = {"level",
  "phone",
  "status",
  "businessLicence",
  "hygieneLicence",
  "note",
  "enterprise",
  "principal",
  "time",
  "address",
  "latitude",
  "longitude"
 };
 
 public Content() {
  time = System.currentTimeMillis();
  init();
 }

public Content(JSONObject jObj) {
  if (null == jObj) {
   time = System.currentTimeMillis();
   return;
  }
  init();
  try {
   fromJSONObject(jObj);
  } catch (Exception e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }

public String getCategory() {
  // TODO Auto-generated method stub
  return category;
 }

public JSONObject toJSONObject() {
  // TODO Auto-generated method stub
  return null;
 }

public Content fromJSONObject(JSONObject jObj) throws JSONException {
  if (null == jObj)
   return null;
  Object obj;
  for (String property : properties) {
   if (jObj.has(property)) {
    obj = jObj.get(property);

// 方法1:
    // 比较文明,调用类的set 方法进行赋值.
    setProperty("set" + property, obj);
    // 方法2:
    // 直接对属性赋值,有点野蛮
    // this.getClass().getDeclaredField(property).set(property, v);
    // Field field = this.getClass().getDeclaredField(property);
    // boolean accessible = field.isAccessible();
    // field.setAccessible(true);
    // field.set(this, v);
    // field.setAccessible(accessible);
   }
  }

  return this;
 }
 
 /** 下面是常用的老土的方法,全是体力活 :
  *
  */
 public Content fromJSONObject2(JSONObject jObj) throws JSONException {
  if (null == jObj)
   return null;

  if (jObj.has("level")) {
   level = jObj.getInt("level");
  }
  if (jObj.has("status")) {
   status = jObj.getString("status");
  }
  if (jObj.has("businessLicence")) {
   businessLicence = jObj.getBoolean("businessLicence");
  }
  if (jObj.has("hygieneLicence")) {
   hygieneLicence = jObj.getBoolean("hygieneLicence");
  }
  if (jObj.has("note")) {
   note = jObj.getString("note");
  }
  if (jObj.has("enterprise")) {
   enterprise = jObj.getString("enterprise");
  }
  if (jObj.has("principal")) {
   principal = jObj.getString("principal");
  }
  if (jObj.has("time")) {
   time = jObj.getLong("time");
  }
  if (jObj.has("address")) {
   address = jObj.getString("address");
  }
  if (jObj.has("latitude")) {
   latitude = jObj.getDouble("latitude");
  }
  if (jObj.has("longitude")) {
   longitude = jObj.getDouble("longitude");
  }
  return this;
 }

 public int getLevel() {
  return level;
 }

public void setLevel(int level) {
  this.level = level;
 }

public String getStatus() {
  return status;
 }

public void setStatus(String status) {
  this.status = status;
 }

public boolean isBusinessLicence() {
  return businessLicence;
 }

public void setBusinessLicence(boolean businessLicence) {
  this.businessLicence = businessLicence;
 }

public boolean isHygieneLicence() {
  return hygieneLicence;
 }

public void setHygieneLicence(boolean hygieneLicence) {
  this.hygieneLicence = hygieneLicence;
 }

public String getNote() {
  return note;
 }

public void setNote(String note) {
  this.note = note;
 }

public String getEnterprise() {
  return enterprise;
 }

public void setEnterprise(String enterprise) {
  this.enterprise = enterprise;
 }

public String getPrincipal() {
  return principal;
 }

public void setPrincipal(String principal) {
  this.principal = principal;
 }

public long getTime() {
  return time;
 }

public void setTime(long time) {
  this.time = time;
 }

public String getAddress() {
  return address;
 }

public void setAddress(String address) {
  this.address = address;
 }

public double getLatitude() {
  return latitude;
 }

public void setLatitude(double latitude) {
  this.latitude = latitude;
 }

public double getLongitude() {
  return longitude;
 }

public void setLongitude(double longitude) {
  this.longitude = longitude;
 }

boolean isMe(String category) {
  this.category.equals(category);
 }

public String getContent() {
  return note;
 }

public Drawable getIcon() {
  return null;
 }

String getVillage() {
  return null;
 }

public String getCell() {
  return null;
 }

public String getPhone() {
  return phone;
 }

public void setPhone(String phone) {
  this.phone = phone;
 }