Springboot 在和fastjson配合使用时,当返回实体为空时拦截不显示问题。在实际业务中,不管返回实体是否为空,都需要显示出来,如果为空则显示null。
解决方案,引入fastjson jar包
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.22</version>
</dependency>
添加配置ResultConfig:
package com.cictec.network.bus.message.config;
/**
* @author :zoboy
* @Description:
* @ Date: Created in 2019-11-18 10:29
*/
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.autoconfigure.http.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 java.util.ArrayList;
import java.util.List;
@Configuration
public class ResultConfig {
/*注入Bean : HttpMessageConverters,以支持fastjson*/
@Bean
public HttpMessageConverters fastJsonHttpMessageConverters() {
FastJsonHttpMessageConverter fastConvert = new FastJsonHttpMessageConverter();
FastJsonConfig fastJsonConfig = new FastJsonConfig();
fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat,
SerializerFeature.WriteNullStringAsEmpty,
SerializerFeature.WriteNullNumberAsZero,
SerializerFeature.WriteNullListAsEmpty,
SerializerFeature.WriteMapNullValue,
SerializerFeature.DisableCheckSpecialChar);
fastJsonConfig.setDateFormat("yyyy-MM-dd hh:mm:ss");
//处理中文乱码问题
List<MediaType> fastMediaTypes = new ArrayList<>();
fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
fastConvert.setSupportedMediaTypes(fastMediaTypes);
fastConvert.setFastJsonConfig(fastJsonConfig);
return new HttpMessageConverters((HttpMessageConverter<?>) fastConvert);
}
}
结果:
{
"code": "0",
"message": "成功!",
"data": null
}
解决问题