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两种方式配置fastjson

一、在启动类直接注入bean

@Bean    public HttpMessageConverters fastJsonHttpMessageConverters(){        //1. 需要定义一个converter转换消息的对象        FastJsonHttpMessageConverter fasHttpMessageConverter = new FastJsonHttpMessageConverter();        //2. 添加fastjson的配置信息，比如:是否需要格式化返回的json的数据        FastJsonConfig fastJsonConfig = new FastJsonConfig();        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);        //3. 在converter中添加配置信息        fasHttpMessageConverter.setFastJsonConfig(fastJsonConfig);        return new HttpMessageConverters((HttpMessageConverter
   ) fasHttpMessageConverter);    }

二、创建config类实现WebMvcConfigurer(springboot为2.0版本的)

package com.example.config;import com.alibaba.fastjson.serializer.SerializerFeature;import com.alibaba.fastjson.support.config.FastJsonConfig;import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;import org.springframework.context.annotation.Configuration;import org.springframework.http.MediaType;import org.springframework.http.converter.HttpMessageConverter;import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;import java.util.ArrayList;import java.util.List;/** * @author xiaobu * @version JDK1.8.0_171 * @date on  2019/1/14 12:46 * @description V1.0 */@Configurationpublic class WebMvcConfig implements WebMvcConfigurer {    @Override    public void configureMessageConverters(List
   
    > converters) {        converters.removeIf(converter -> converter instanceof MappingJackson2HttpMessageConverter);        converters.add(fastJsonHttpMessageConverter());        System.out.println("converters = " + converters);    }    /**     * fastJson相关设置     */    private FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();        List
    
      supportedMediaTypes = new ArrayList
     
      ();        supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);        fastJsonHttpMessageConverter.setSupportedMediaTypes(supportedMediaTypes);        fastJsonHttpMessageConverter.setFastJsonConfig(getFastJsonConfig());        return fastJsonHttpMessageConverter;    }    /**     * fastJson相关设置     */    private FastJsonConfig getFastJsonConfig() {        FastJsonConfig fastJsonConfig = new FastJsonConfig();        // 在serializerFeatureList中添加转换规则        List
      
        serializerFeatureList = new ArrayList
       
        ();        serializerFeatureList.add(SerializerFeature.PrettyFormat);        serializerFeatureList.add(SerializerFeature.WriteMapNullValue);        serializerFeatureList.add(SerializerFeature.WriteNullStringAsEmpty);        serializerFeatureList.add(SerializerFeature.WriteNullListAsEmpty);        serializerFeatureList.add(SerializerFeature.DisableCircularReferenceDetect);        SerializerFeature[] serializerFeatures = serializerFeatureList.toArray(new SerializerFeature[0]);        fastJsonConfig.setSerializerFeatures(serializerFeatures);        return fastJsonConfig;    }}
       
      
     
    
   

三、测试

新建个pojo类

package com.example.entity;import com.alibaba.fastjson.annotation.JSONField;import lombok.Data;import java.time.LocalDateTime;/** * @author xiaobu * @version JDK1.8.0_171 * @date on  2019/2/14 10:09 * @description V1.0 */@Datapublic class FastJson {    private int id;    private String name;    @JSONField(format = "yyyy-MM-dd hh:mm:ss")    private LocalDateTime birthDate;}

接着创建个控制器类

package com.example.controller;import com.alibaba.fastjson.JSON;import com.example.entity.FastJson;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;import java.time.LocalDateTime;/** * @author xiaobu * @version JDK1.8.0_171 * @date on  2019/2/14 9:59 * @description V1.0 验证项目集成fastjson是否成功  观察下面的demo2方法表明fastjson配置生效了,默认是启用jackjson */@RestController@RequestMapping("fastJson")public class FastJsonController {    @GetMapping("demo2")    public FastJson demo2(){        FastJson fastJson = new FastJson();        fastJson.setId(1);        fastJson.setName("xiaobu");        fastJson.setBirthDate(LocalDateTime.now());        return  fastJson;    }    @GetMapping("demo3")    public String demo3(){        FastJson fastJson = new FastJson();        fastJson.setId(1);        fastJson.setName("xiaobu");        fastJson.setBirthDate(LocalDateTime.now());       return JSON.toJSONString(fastJson);    }}

结果：

参考：

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