余歆添加如下配置，接收+返回web数据时，统一格式化传参:
@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {
@Override
public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
ObjectMapper objectMapper = jackson2HttpMessageConverter.getObjectMapper();
//json中多余的参数不报错，不想要可以改掉
objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
//设置全局的时间转化
SimpleDateFormat smt = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
objectMapper.setDateFormat(smt);
//解决时区差8小时问题
objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
//设置中文编码格式
List<MediaType> list = new ArrayList<MediaType>();
list.add(MediaType.APPLICATION_JSON_UTF8);
jackson2HttpMessageConverter.setSupportedMediaTypes(list);
//生成json时，将所有Long转换成String
SimpleModule simpleModule = new SimpleModule();
simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
objectMapper.registerModule(simpleModule);
jackson2HttpMessageConverter.setObjectMapper(objectMapper);
converters.add(0, jackson2HttpMessageConverter);
}
}