最近，后台一个接口返回了俩种不同的json解析格式，就顺便整理了一下。直接上代码。文章末尾有示例demo。
1、Gson
依赖
implementation ‘com.google.code.gson:gson:2.8.6‘
Gson gson = new Gson();
实体类(Bean)转JSON
String json = gson.toJson(new Bean());
JSON转实体类(Bean)
Bean b = gson.fromJson(‘json‘,Bean.class);
Map转Json
gson.toJson(map)
Json转Map
Map<String, Object> map = gson.fromJson("json",new TypeToken<Map<String, Object>>() {}.getType());
List 转JSON
LList<Bean> list = new ArrayList<>();
list.add(new Bean());
gson.toJson(list)
JSON转List
List<Bean> list = gson.fromJson(‘json‘,new TypeToken<List<Bean>>(){}.getType());
2、FastJson
依赖
implementation ‘com.alibaba:fastjson:1.2.70‘
实体类(Bean)转JSON
JSON.toJSONString(new Bean())
JSON转实体类(Bean)
Bean b = JSON.parseObject(‘json‘,Bean.class);
Map转Json
JSON.toJSONString(‘map‘)
Json转Map
JSONObject jsonObject = JSONObject.parseObject(JSON.toJSONString(new Bean()));
Map<String,Object> map = (Map<String,Object>)jsonObject;
Object object = map.get("array");
List 转JSON
List<Bean> list = new ArrayList<>();
list.add(new Bean());
JSON.toJSONString(list)
JSON转List
JSON.parseArray(‘json‘,Bean.class);
3、JackJson
依赖
implementation ‘com.fasterxml.jackson.core:jackson-databind:2.11.0‘
需要 throws JsonProcessingException
private static ObjectMapper MAPPER = new ObjectMapper();
实体类(Bean)转JSON
MAPPER.writeValueAsString(new Bean())
JSON转实体类(Bean)
MAPPER.readValue(‘json‘, Bean.class)
Map转Json
MAPPER.writeValueAsString(‘map‘)
Json转Map
Map map = MAPPER.readValue(‘json‘,Map.class);
List 转JSON
List<Bean> list = new ArrayList<>();
list.add(new Bean());
String ljson = MAPPER.writeValueAsString(list);
JSON转List
MAPPER.readValue(‘json‘, ArrayList.class)
4、ProtoBuf
配置依赖 具体配置查看 demo
implementation ‘com.googlecode.protobuf-java-format:protobuf-java-format:1.2‘
ProtoBuf转Json
BeanBuf beanBuf = BeanBuf.newBuilder().setName("测试").build();
String jsonFormat = JsonFormat.printToString(beanBuf);
Json转ProtoBuf
BeanBuf bean = BeanBuf.newBuilder().build();
JsonFormat.merge(‘json‘, bean.toBuilder());
Proto序列化
BeanBuf bean = BeanBuf.newBuilder().setAge(11111111).build();
byte[] byteArray1 = bean.toByteArray();
Arrays.toString(byteArray1)
Proto反序列化
BeanBuf bean = BeanBuf.newBuilder().setAge(11111111).build();
try {
BeanBuf buf = BeanBuf.parseFrom(bean.toByteArray());
mBinding.textView.setText(buf.toString());
} catch (IOException e) {
e.printStackTrace();
}