for Eclipse：

下载将FastJson.java复制到自己的项目即可

for Android Studio:

• Step 1. Add the JitPack repository to your build file

allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

• Step 2. Add the dependency

dependencies {
	        compile 'com.github.gxh-apologize:JSONGxh:1.0'
	}

how to use

//json to mode
//参数一：实体类class对象
//参数二：需要解析的json
 User user= (User)FastJson.parseObject(User.class,json);

//mode to json
//参数：实体类对象
String json = FastJson.toJson(user);