Java Json 数据下划线与驼峰格式进行相互转换
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2023-12-23 12:46:52
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概述
今天遇见一个需求,需要对json数据进行下划线与驼峰格式之间进行转换,在Fastjson、Jackson、Gson都提供了转换的方式,在这里进行一下列举。
User类:
public class User {
private String nameInfo;
private String ageInfo;
public String getNameInfo() {
return nameInfo;
}
public void setNameInfo(String nameInfo) {
this.nameInfo = nameInfo;
}
public String getAgeInfo() {
return ageInfo;
}
public void setAgeInfo(String ageInfo) {
this.ageInfo = ageInfo;
}
}
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);
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);
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);