Spring Boot 3.x 整合 fastjson 2

Jin大约 1 分钟

Spring Boot 3.x 整合 fastjson 2

1、环境

Spring Boot 3.3

2、Maven配置

排除 Spring Boot 默认使用的 Jackson

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
    <!--去掉 jackson 依赖-->
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-json</artifactId>
        </exclusion>
    </exclusions>
</dependency>

加入 fastjson 2 的依赖

<properties>
    <fastjson2.version>2.0.51</fastjson2.version>
</properties>

<dependency>
    <groupId>com.alibaba.fastjson2</groupId>
    <artifactId>fastjson2</artifactId>
    <version>${fastjson2.version}</version>
</dependency>

<dependency>
    <groupId>com.alibaba.fastjson2</groupId>
    <artifactId>fastjson2-extension-spring6</artifactId>
    <version>${fastjson2.version}</version>
</dependency>

3、Fastjson 自定义配置

import com.alibaba.fastjson2.JSONWriter;
import com.alibaba.fastjson2.support.config.FastJsonConfig;
import com.alibaba.fastjson2.support.spring6.http.converter.FastJsonHttpMessageConverter;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;


@Configuration
public class FastjsonConfig implements WebMvcConfigurer {
    /**
     * 配置fastjson输出格式
     **/
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

//        添加fastjson转换器
        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
        List<MediaType> fastConverter = new ArrayList<>();
//        添加支持的媒体类型
        fastConverter.add(MediaType.APPLICATION_JSON);
        fastConverter.add(MediaType.APPLICATION_ATOM_XML);
        fastConverter.add(MediaType.APPLICATION_FORM_URLENCODED);
        fastConverter.add(MediaType.APPLICATION_OCTET_STREAM);
        fastConverter.add(MediaType.APPLICATION_PDF);
        fastConverter.add(MediaType.APPLICATION_RSS_XML);
        fastConverter.add(MediaType.APPLICATION_XHTML_XML);
        fastConverter.add(MediaType.APPLICATION_XML);
        fastConverter.add(MediaType.IMAGE_GIF);
        fastConverter.add(MediaType.IMAGE_JPEG);
        fastConverter.add(MediaType.IMAGE_PNG);
        fastConverter.add(MediaType.TEXT_EVENT_STREAM);
        fastConverter.add(MediaType.TEXT_HTML);
        fastConverter.add(MediaType.TEXT_MARKDOWN);
        fastConverter.add(MediaType.TEXT_PLAIN);
        fastConverter.add(MediaType.TEXT_XML);
//        在convert中添加配置信息
        converter.setSupportedMediaTypes(fastConverter);

//        配置fastjson
        FastJsonConfig config = new FastJsonConfig();
        config.setDateFormat("yyyy-MM-dd HH:mm:ss");
        config.setCharset(StandardCharsets.UTF_8);
        config.setWriterFeatures(
                JSONWriter.Feature.WriteNullListAsEmpty,
                //json格式化
                JSONWriter.Feature.PrettyFormat,
                //输出map中value为null的数据
                JSONWriter.Feature.WriteMapNullValue,
                //输出boolean 为 false
                JSONWriter.Feature.WriteNullBooleanAsFalse,
                //输出list 为 []
                JSONWriter.Feature.WriteNullListAsEmpty,
                //输出number 为 0
                JSONWriter.Feature.WriteNullNumberAsZero,
                //输出字符串 为 ""
                JSONWriter.Feature.WriteNullStringAsEmpty,
                //对map进行排序
                JSONWriter.Feature.SortMapEntriesByKeys
        );

//        将convert添加到converters
        converter.setFastJsonConfig(config);
        converters.add(0, converter);
    }
}

4、案例