JavaBean 和JOSN 转换过程中格式选择

一、Fastjson

// 生产环境中，config要做singleton处理，要不然会存在性能问题
User user = new User();
user.setNameInfo("coder");
user.setAgeInfo("28");
SerializeConfig config = new SerializeConfig();
config.propertyNamingStrategy = PropertyNamingStrategy.SnakeCase;
String json = JSON.toJSONString(user, config);
Assert.assertEquals("{\"age_info\":\"28\",\"name_info\":\"coder\"}", json);

二、Gson

GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.setFieldNamingPolicy(FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES);
Gson gson = gsonBuilder.create();

User user = new User();
user.setName("coder");
user.setAge(28);

String json = gson.toJson(user);
Assert.assertEquals("{\"age_info\":\"28\",\"name_info\":\"coder\"}", json);

三、Jackson

User user = new User();
user.setNameInfo("coder");
user.setAgeInfo("28");
ObjectMapper mapper = new ObjectMapper();
mapper.setPropertyNamingStrategy(com.fasterxml.jackson.databind.PropertyNamingStrategy.SNAKE_CASE);
String json = mapper.writeValueAsString(user);
Assert.assertEquals("{\"name_info\":\"coder\",\"age_info\":\"28\"}", json);