序列化反序列化

编写反序列化Adapter

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1. import com.google.gson.*;
2. import com.google.gson.JsonDeserializer;
4. import java.lang.reflect.Type;
5. import java.math.BigDecimal;
6. import java.util.HashMap;
7. import java.util.Map;
9. /**
10. * Created by IntelliJ IDEA.
11. * User: chuang.liu
12. * Date: 11-7-22
13. * Time: 上午10:24
14. * To change this template use File | Settings | File Templates.
15. */
16. publicclass NaturalDeserializerimplements JsonDeserializer<Object> {
17. public Object deserialize(JsonElement json, Type typeOfT,
18. JsonDeserializationContext context) {
19. if(json.isJsonNull())returnnull;
20. elseif(json.isJsonPrimitive())return handlePrimitive(json.getAsJsonPrimitive());
21. elseif(json.isJsonArray())return handleArray(json.getAsJsonArray(), context);
22. elsereturn handleObject(json.getAsJsonObject(), context);
23. }
24. private Object handlePrimitive(JsonPrimitive json) {
25. if(json.isBoolean())
26. return json.getAsBoolean();
27. elseif(json.isString())
28. return json.getAsString();
29. else {
30. BigDecimal bigDec = json.getAsBigDecimal();
31. // Find out if it is an int type
32. try {
33. bigDec.toBigIntegerExact();
34. try {return bigDec.intValueExact(); }
35. catch(ArithmeticException e) {}
36. return bigDec.longValue();
37. } catch(ArithmeticException e) {}
38. // Just return it as a double
39. return bigDec.doubleValue();
40. }
41. }
42. private Object handleArray(JsonArray json, JsonDeserializationContext context) {
43. Object[] array = new Object[json.size()];
44. for(int i =0; i < array.length; i++)
45. array[i] = context.deserialize(json.get(i), Object.class);
46. return array;
47. }
48. private Object handleObject(JsonObject json, JsonDeserializationContext context) {
49. Map<String, Object> map = new HashMap<String, Object>();
50. for(Map.Entry<String, JsonElement> entry : json.entrySet())
51. map.put(entry.getKey(), context.deserialize(entry.getValue(), Object.class));
52. return map;
53. }
54. }

import com.google.gson.*;import com.google.gson.JsonDeserializer;import java.lang.reflect.Type;import java.math.BigDecimal;import java.util.HashMap;import java.util.Map;/** * Created by IntelliJ IDEA. * User: chuang.liu * Date: 11-7-22 * Time: 上午10:24 * To change this template use File | Settings | File Templates. */public   class NaturalDeserializer implements JsonDeserializer<Object> {  public Object deserialize(JsonElement json, Type typeOfT,      JsonDeserializationContext context) {    if(json.isJsonNull()) return null;    else if(json.isJsonPrimitive()) return handlePrimitive(json.getAsJsonPrimitive());    else if(json.isJsonArray()) return handleArray(json.getAsJsonArray(), context);    else return handleObject(json.getAsJsonObject(), context);  }  private Object handlePrimitive(JsonPrimitive json) {    if(json.isBoolean())      return json.getAsBoolean();    else if(json.isString())      return json.getAsString();    else {      BigDecimal bigDec = json.getAsBigDecimal();      // Find out if it is an int type      try {        bigDec.toBigIntegerExact();        try { return bigDec.intValueExact(); }        catch(ArithmeticException e) {}        return bigDec.longValue();      } catch(ArithmeticException e) {}      // Just return it as a double      return bigDec.doubleValue();    }  }  private Object handleArray(JsonArray json, JsonDeserializationContext context) {    Object[] array = new Object[json.size()];    for(int i = 0; i < array.length; i++)      array[i] = context.deserialize(json.get(i), Object.class);    return array;  }  private Object handleObject(JsonObject json, JsonDeserializationContext context) {    Map<String, Object> map = new HashMap<String, Object>();    for(Map.Entry<String, JsonElement> entry : json.entrySet())      map.put(entry.getKey(), context.deserialize(entry.getValue(), Object.class));    return map;  }}

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1. 在test类中调用测试下

在test类中调用测试下

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1. <pre class="java" name="code"></pre><preclass="java" name="code">import com.dev.core.user.model.User;
2. import com.google.gson.*;
4. import java.util.HashMap;
5. import java.util.Map;
7. /**
8. * Created by IntelliJ IDEA.
9. * User: chuang.liu
10. * Date: 11-7-21
11. * Time: 下午3:50
12. * To change this template use File | Settings | File Templates.
13. */
14. publicclass test {
15. privateint data;
16. private Map<String,Object> mapData;
17. publicvoid setData(int data){
18. this.data =data;
19. }
21. publicint getData(){
22. return data;
23. }
25. publicvoid setmapData(Map<String,Object> data){
26. this.mapData =data;
27. }
29. public Map<String,Object> getmapData(){
30. return mapData;
32. }
33. publicstaticvoid main(String arg[]){
34. GsonBuilder gsonBuilder = new GsonBuilder();
35. gsonBuilder.registerTypeAdapter(Object.class,new NaturalDeserializer());
36. Gson gson = gsonBuilder.create();
37. Map<String, Object> data = new HashMap<String, Object>();
38. data.put("user",new User());
39. data.put("url","http:///sina/verify?code=");
40. test t =new test();
41. t.setData(10);
42. t.setmapData(data);
43. String jstring = gson.toJson(t);
44. test nt = gson.fromJson(jstring,test.class);
45. System.out.println("done");
46. }
47. }
48. </pre><br><br>