HttpMessageConverter.md

HttpMessageConverter

https://www.cnblogs.com/hhhshct/p/9676604.html

package com.ydxy.config;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

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.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.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration
public class MessageConverterConfig implements WebMvcConfigurer {

    @Bean
    public StringHttpMessageConverter stringHttpMessageConverter() {
        StringHttpMessageConverter converter = new StringHttpMessageConverter();
        converter.setDefaultCharset(Charset.forName("UTF-8"));
        return converter;
    }

    @Bean
    public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
        List<MediaType> mts = new ArrayList<>(Arrays.asList(MediaType.TEXT_HTML, MediaType.APPLICATION_JSON));
        converter.setSupportedMediaTypes(mts);
        FastJsonConfig fc = new FastJsonConfig();
        fc.setSerializerFeatures(SerializerFeature.WriteDateUseDateFormat,
                SerializerFeature.DisableCircularReferenceDetect,
                SerializerFeature.WriteMapNullValue,
                SerializerFeature.WriteNullNumberAsZero,
                SerializerFeature.WriteNullStringAsEmpty,
                SerializerFeature.WriteNullListAsEmpty,
                SerializerFeature.WriteNullBooleanAsFalse);
        converter.setFastJsonConfig(fc);
        converter.setDefaultCharset(Charset.forName("UTF-8"));
        return converter;
    }

    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.add(fastJsonHttpMessageConverter());
        converters.add(0, stringHttpMessageConverter());
        WebMvcConfigurer.super.extendMessageConverters(converters);
    }
}

Tip

StringHttpMessageConverter用于返回字符串时，不在两端带上引号