Fastjson API versi Cina

Kelas JSON ialah pintu masuk API fastjson, dan fungsi utama disediakan melalui kelas ini.

Serialization API

package com.alibaba.fastjson;public abstract class JSON {    // 将Java对象序列化为JSON字符串，支持各种各种Java基本类型和JavaBean
    public static String toJSONString(Object object, SerializerFeature... features);    // 将Java对象序列化为JSON字符串，返回JSON字符串的utf-8 bytes
    public static byte[] toJSONBytes(Object object, SerializerFeature... features);    // 将Java对象序列化为JSON字符串，写入到Writer中
    public static void writeJSONString(Writer writer, 
                                       Object object, 
                                       SerializerFeature... features);    // 将Java对象序列化为JSON字符串，按UTF-8编码写入到OutputStream中
    public static final int writeJSONString(OutputStream os, // 
                                            Object object, // 
                                            SerializerFeature... features);



}

JSON String Deserialization API

package com.alibaba.fastjson;

public abstract class JSON {
    // 将JSON字符串反序列化为JavaBean
    public static <T> T parseObject(String jsonStr, 
                                    Class<T> clazz, 
                                    Feature... features);

    // 将JSON字符串反序列化为JavaBean
    public static <T> T parseObject(byte[] jsonBytes,  // UTF-8格式的JSON字符串
                                    Class<T> clazz, 
                                    Feature... features);

    // 将JSON字符串反序列化为泛型类型的JavaBean
    public static <T> T parseObject(String text, 
                                    TypeReference<T> type, 
                                    Feature... features);

    // 将JSON字符串反序列为JSONObject
    public static JSONObject parseObject(String text);
}

Demo

Demo

import com.alibaba.fastjson.*;

JSONObject jsonObj = JSON.parseObject(jsonStr);

import com.alibaba.fastjson.JSON;

Model model = JSON.parseObject(jsonStr, Model.class);

parse pojo generic

import com.alibaba.fastjson.JSON;

Type type = new TypeReference<List<Model>>() {}.getType(); 
List<Model> list = JSON.parseObject(jsonStr, type);

convert pojo to json string

convert pojo to json bytes

import com.alibaba.fastjson.JSON;Model model = ...; 
String jsonStr = JSON.toJSONString(model);

write pojo sebagai json string to outputstream

import com.alibaba.fastjson.JSON;Model model = ...; 
byte[] jsonBytes = JSON.toJSONBytes(model);