spring boot 接口返回配置 @ResponseBody ，则返回自定义的对象，解析成json。 但是,部分字段能友好的展示出来。如 Date，Long。Date必须手动格式化，才能输出想要的格式，还要注意时区问题。Long类型，相对过长的Long类型，会进行四舍五入等处理，失去准确性。
如Date类型处理需要给属性值加上注解：
@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")Long类型配置和其他配置，可以交给以下代码解决
import com.fasterxml.jackson.annotation.JsonInclude; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.module.SimpleModule; import com.fasterxml.jackson.databind.ser.std.ToStringSerializer; import java.math.BigDecimal; import java.nio.charset.Charset; import java.util.ArrayList; import java.util.List; import org.springframework.boot.autoconfigure.web.HttpMessageConverters; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.MediaType; import org.springframework.http.converter.HttpMessageConverter; import org.springframework.http.converter.StringHttpMessageConverter; import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter; import org.springframework.web.servlet.config.annotation.EnableWebMvc; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; /** * web配置 * * @author * @date 2017-08-23 15:48 */ @Configuration @EnableWebMvc public class WebConfig extends WebMvcConfigurerAdapter { @Bean public MappingJackson2HttpMessageConverter getMappingJackson2HttpMessageConverter() { MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter(); //设置日期格式 ObjectMapper objectMapper = new ObjectMapper(); objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL); /** * 序列换成json时,将所有的long变成string * 因为js中得数字类型不能包含所有的java long值 */ SimpleModule simpleModule = new SimpleModule(); simpleModule.addSerializer(Long.class, ToStringSerializer.instance); simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance); simpleModule.addSerializer(BigDecimal.class, ToStringSerializer.instance); objectMapper.registerModule(simpleModule); mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper); //设置中文编码格式 // List<MediaType> list = new ArrayList<MediaType>(); // list.add(MediaType.APPLICATION_JSON_UTF8); // mappingJackson2HttpMessageConverter.setSupportedMediaTypes(list); return mappingJackson2HttpMessageConverter; } @Bean public StringHttpMessageConverter getStringHttpMessageConverter() { StringHttpMessageConverter stringHttpMessageConverter = new StringHttpMessageConverter(Charset.forName("GBK")); //设置中文编码格式 List<MediaType> list = new ArrayList<MediaType>(); list.add(MediaType.APPLICATION_XML); stringHttpMessageConverter.setSupportedMediaTypes(list); return stringHttpMessageConverter; } @Override public void configureMessageConverters(List<HttpMessageConverter<?>> converters) { List<HttpMessageConverter<?>> convertersList = new HttpMessageConverters().getConverters(); for(int i = 0; i < convertersList.size(); i++){ if(convertersList.get(i) instanceof MappingJackson2HttpMessageConverter){ converters.add(getMappingJackson2HttpMessageConverter()); }else if(convertersList.get(i) instanceof StringHttpMessageConverter){ converters.add(getStringHttpMessageConverter()); }else{ converters.add(convertersList.get(i)); } } } }