Java的JsonHelper

<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.8.0</version>
</dependency>

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

class JsonHelper
{
public static Gson gson= new GsonBuilder() .setDateFormat("yyyy-MM-dd HH:mm:ss").create();
public static<T> String toJson(T instance)
{
if(instance==null)
{
return "";
} return gson.toJson(instance);
} public static<T> T toInstance(String json,String className)
{
try{
T instance = (T) gson.fromJson(json,Class.forName(className));
return instance;
}
catch (Exception ex)
{
System.out.println("序列化失败");
}
return null;
} public static<T> T toInstance(String json,Class className)
{
try{
T instance = (T) gson.fromJson(json,className);
return instance;
}
catch (Exception ex)
{
System.out.println("序列化失败");
}
return null;
}}

Employee instance = new Employee("Aven", 1000, Calendar.getInstance().getTime());
try{
json=JsonHelper.toJson(instance);
System.out.println(json); Employee employee3 = JsonHelper.toInstance(json,"com.ppmoney.test.Employee");
if(employee3!=null)
System.out.println(employee3.toString());
}
catch (Exception ex)
{
System.out.println("序列化失败");
}