修改readme

patient-co/patient-co-wlyy/src/main/java/com/yihu/wlyy/config/MvcConfig.java

@@ -1,13 +1,19 @@
package com.yihu.wlyy.config;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.yihu.wlyy.interceptors.DoctorInterceptor;
import com.yihu.wlyy.interceptors.PatientInterceptor;
import com.yihu.wlyy.interceptors.UserInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import java.util.List;
/**
 * Created by chenweida on 2017/4/6.
 */
@@ -31,4 +37,16 @@ public class MvcConfig extends WebMvcConfigurerAdapter {
        super.addInterceptors(registry);
    }
    /**
     * 为null的数据不返回
     * @param converters
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper=new ObjectMapper();
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        mappingJackson2HttpMessageConverter.setObjectMapper(objectMapper);
        converters.add(mappingJackson2HttpMessageConverter);
    }
}