FastJSON使用案例（fastjson-1.1.28.jar）

import java.util.List;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;

public class FastJSONHelper {

    /**
     * 将java类型的对象转换为JSON格式的字符串
     * @param object java类型的对象
     * @return JSON格式的字符串
     */
    public static <T> String serialize(T object) {
        return JSON.toJSONString(object);
    }

    /**
     * 将JSON格式的字符串转换为java类型的对象或者java数组类型的对象，不包括java集合类型
     * @param json JSON格式的字符串
     * @param clz java类型或者java数组类型，不包括java集合类型
     * @return java类型的对象或者java数组类型的对象，不包括java集合类型的对象
     */
    public static <T> T deserialize(String json, Class<T> clz) {
        return JSON.parseObject(json, clz);
    }

    /**
     * 将JSON格式的字符串转换为List<T>类型的对象
     * @param json JSON格式的字符串
     * @param clz 指定泛型集合里面的T类型
     * @return List<T>类型的对象
     */
    public static <T> List<T> deserializeList(String json, Class<T> clz) {
        return JSON.parseArray(json, clz);
    }

    /**
     * 将JSON格式的字符串转换成任意Java类型的对象
     * @param json JSON格式的字符串
     * @param type 任意Java类型
     * @return 任意Java类型的对象
     */
    public static <T> T deserializeAny(String json, TypeReference<T> type) {
        return JSON.parseObject(json, type);
    }

}

public class Person {
    private int Age;
    private String Name;
    public int getAge() {
        return Age;
    }
    public void setAge(int age) {
        Age = age;
    }
    public String getName() {
        return Name;
    }
    public void setName(String name) {
        Name = name;
    }
}

public class Program1 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Person person = new Person();
        person.setAge(32);
        person.setName("wangyunpeng");
        String json = FastJSONHelper.serialize(person);
        System.out.println(json);
        
        person = FastJSONHelper.deserialize(json, Person.class);
        System.out.println(String.format("Name:%s,Age:%s",person.getName(),person.getAge()));
    }

}

import java.util.ArrayList;

public class Program2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        
        ArrayList<Person> list = new ArrayList<Person>();
        Person person1 = new Person();
        person1.setAge(32);
        person1.setName("wangyunpeng");
        list.add(person1);
        Person person2 = new Person();
        person2.setAge(17);
        person2.setName("shyx");
        list.add(person2);
        String json = FastJSONHelper.serialize(list);
        System.out.println(json);
        
        Person[] persons = FastJSONHelper.deserialize(json, Person[].class);
        for (Person person : persons) {
            System.out.println(String.format("Name:%s,Age:%s", person.getName(),person.getAge()));
        }
    }
}

import java.util.ArrayList;
import java.util.List;


public class Program3 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        ArrayList<Person> list = new ArrayList<Person>();
        Person person1 = new Person();
        person1.setAge(32);
        person1.setName("wangyunpeng");
        list.add(person1);
        Person person2 = new Person();
        person2.setAge(17);
        person2.setName("shyx");
        list.add(person2);
        String json = FastJSONHelper.serialize(list);
        System.out.println(json);
        
        List<Person> personList = FastJSONHelper.deserializeList(json, Person.class);
        for (Person person : personList) {
            System.out.println(String.format("Name:%s,Age:%s", person.getName(),person.getAge()));
        }
    }

}

import java.util.ArrayList;
import java.util.List;

public class Program4 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        List<String> list = new ArrayList<String>();
        list.add("wyp");
        list.add("shyx");
        String json = FastJSONHelper.serialize(list);
        System.out.println(json);
        list = FastJSONHelper.deserializeList(json, String.class);
        for (String string : list) {
            System.out.println(string);
        }
    }
}

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.TypeReference;

public class Program5 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        HashMap<String, Object> map = new HashMap<String, Object>();
        map.put("key1", "value1");
        map.put("key2", "value2");

        HashMap<String, Object> map2 = new HashMap<String, Object>();
        map2.put("key1", 1);
        map2.put("key2", 2);

        HashMap<String, Object> map3 = new HashMap<String, Object>();
        Person person1 = new Person();
        person1.setAge(32);
        person1.setName("wangyunpeng");
        map3.put("wyp", person1);
        Person person2 = new Person();
        person2.setAge(17);
        person2.setName("shenyunxiao");
        map3.put("shyx", person2);

        List<HashMap<String, Object>> list = new ArrayList<HashMap<String, Object>>();
        list.add(map);
        list.add(map2);
        list.add(map3);

        String json = FastJSONHelper.serialize(list);
        System.out.println(json);

        list = FastJSONHelper.deserializeAny(json,
                new TypeReference<List<HashMap<String, Object>>>() {
                });
        for (HashMap<String, Object> item : list) {
            for (Map.Entry<String, Object> entry : item.entrySet()) {
                String key = entry.getKey();
                Object value = entry.getValue();
                if (value instanceof JSONObject) {
                    JSONObject jObj = (JSONObject) value;
                    String json2 = FastJSONHelper.serialize(jObj);
                    Person other = FastJSONHelper.deserialize(json2, Person.class);
                    System.out.println(String.format(
                            "Key:%s,Value:[Name:%s,Age:%s]", key,
                            other.getName(), other.getAge()));
                } else {
                    System.out.println(String.format("Key:%s,Value:%s", key,
                            value));
                }
            }
        }

    }

}