package com.xinwei.util;
import java.lang.reflect.Type;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Map;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;
import com.google.gson.JsonPrimitive;
import com.google.gson.JsonSerializationContext;
import com.google.gson.JsonSerializer;
import com.google.gson.reflect.TypeToken;
public class JsonUtil{
// 支持转换的日期格式
public static final DateFormat[] ACCEPT_DATE_FORMATS = {
new SimpleDateFormat("MM/dd/yyyy"),
new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"),
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"),
new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")
};
/**
* 将对象序列化为json字符串,只对有@expose注解的进行序列化
* @param obj
* @return
*/
public static String toJsonWithExclusive(Object obj){
Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation()
.registerTypeAdapter(Date.class, new MyDateSerializer())
.create();
String json = gson.toJson(obj);
return json;
}
/**
* 将对象序列化为json字符串，不区分注解
* @param obj
* @return
*/
public static String toJson(Object obj){
Gson gson = new GsonBuilder().registerTypeAdapter(Date.class, new MyDateSerializer())
.create();
String json = gson.toJson(obj);
return json;
}
public static String toJsonFilterEquals(Object obj){
Gson gson = new GsonBuilder().disableHtmlEscaping().create();
String json = gson.toJson(obj);
return json;
}
/**
* 将对象序列化为json字符串，不区分注解
* @param obj
* @return
*/
public static String toJson0(Object obj){
String json = toJson(obj, Date.class, new MyTimestampSerializer());
return json;
}
/**
* 将对象序列化为json字符串，不区分注解
* @param obj
* @return
*/
@SuppressWarnings("rawtypes")
public static String toJson(Object obj,Class clazz,JsonSerializer serializer){
Gson gson = new GsonBuilder().registerTypeAdapter(clazz, serializer)
.create();
String json = gson.toJson(obj);
return json;
}
/**
* 将json字符串反序列化为对象,不区分注解
* @param jsonStr
* @param classOfT
* @return
*/
@SuppressWarnings("unchecked")
public static T fromJson(String jsonStr,Type type){
Gson gson = new GsonBuilder().registerTypeAdapter(Date.class, new MyDateDeserializer())
.create();
return (T)gson.fromJson(jsonStr, type);
}
/**
* 将json字符串反序列化为对象,区分注解
* @param jsonStr
* @param classOfT
* @return
*/
@SuppressWarnings("unchecked")
public static T fromJsonWithExclusive(String jsonStr,Type type){
Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation()
.registerTypeAdapter(Date.class, new MyDateDeserializer())
.create();
return (T)gson.fromJson(jsonStr, type);
}
@SuppressWarnings("rawtypes")
public static Map fromJson(String jsonStr){
Type type = new TypeToken
