fastjson属性名设置为PascalCase、SnakeCase、KebabCase
策。。。
fastjson缺省使⽤CamelCase，在1.2.15版本之后，fastjson⽀持配置PropertyNamingStrategy，⽀持如下四种:
name demo
CamelCase persionId
PascalCase PersonId
SnakeCase person_id
KebabCase person-id
使⽤⽅式1
SerializeConfig config = new SerializeConfig(); // ⽣产环境中，config要做singleton处理，要不然会存在性能问题
config.propertyNamingStrategy = PropertyNamingStrategy.SnakeCase;
Model model = new Model();
model.personId = 1001;
String text = JSONString(model, config);
Assert.assertEquals("{\"person_id\":1001}", text);
ParserConfig parserConfig = new ParserConfig(); // ⽣产环境中，parserConfig要做singleton处理，要不然会存在性能问题
parserConfig.propertyNamingStrategy = PropertyNamingStrategy.SnakeCase;
Model model2 = JSON.parseObject(text, Model.class, parserConfig);
Assert.assertEquals(model.personId, model2.personId);
（1）可以写线程安全的单例⼯具类
（2）可以通过springxml⽅式或者java config⽅式构造单例的SerializeConfig的bean，在需要的地⽅注⼊使⽤即。建议命名为对应风格名称+SerializeConfig，如snakeCaseSerializeConfig。
使⽤⽅式2：基于JSONType配置PropertyNamingStrategy
@JSONType(naming=PropertyNamingStrategy.SnakeCase)
public class Cat {
private String name;
private Integer age;
private String sex;
private String testThis;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getTestThis() {
return testThis;
}
public void setTestThis(String testThis) {
}
}
public class FastJsonTest {
@Test
public void propertyNamingStrategyTest(){
Cat cat = new Cat();
cat.setName("张三");
cat.setAge(0);
cat.setSex("male");
cat.setTestThis("testIt");
Assert.assertEquals("{\"age\":0,\"name\":\"张三\",\"sex\":\"male\",\"test_this\":\"testIt\"}", JSONString(cat) );    }
}
⽅式3：Spring单例bean⽅式
@Configuration
public class FastJsonSerializeConfig {
@Bean("snakeCaseSerializeConfig")
@Scope("singleton")
public SerializeConfig snakeCaseSerializeConfig() {
SerializeConfig config = new SerializeConfig();
config.propertyNamingStrategy = PropertyNamingStrategy.SnakeCase;
return config;
}
@Bean("pascalCasSerializeConfig")
@Scope("singleton")
public SerializeConfig pascalCasSerializeConfig() {
SerializeConfig config = new SerializeConfig();
config.propertyNamingStrategy = PropertyNamingStrategy.PascalCase;
return config;
}
}
单元测试
@RunWith(SpringRunner.class)
@SpringBootTest(classes = Application.class)
public class FastJsonTest {
@Resource(name = "snakeCaseSerializeConfig")
private SerializeConfig snakeCaseSerializeConfig;
@Resource(name = "pascalCasSerializeConfig")
private SerializeConfig pascalCasSerializeConfig;
@Test
public void propertyNamingStrategyTest2(){
Cat cat = new Cat();
cat.setName("张三");fastjson忽略属性
cat.setAge(0);
cat.setSex("male");
cat.setTestThis("testIt");
System.out.JSONString(cat,pascalCasSerializeConfig));
System.out.JSONString(cat,snakeCaseSerializeConfig));
Assert.assertEquals("{\"age\":0,\"name\":\"张三\",\"sex\":\"male\",\"test_this\":\"testIt\"}", JSONString(cat,snakeCaseSerializeConfig) );    }
}
修改全局缺省的命名策略
.propertyNamingStrategy = PropertyNamingStrategy.PascalCase;
另外由于fastjson的策略是枚举⽅式，暂时不⽀持⾃定义新的统⼀的属性名策略，如果有其他需求可以通过
@JSONField(name = "xxx")来指定每个属性的名称。

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