Note summaries

This paper takes Spring Boot using fastjson instead of the original JSON framework as an example to show how Spring Boot uses the third-party JSON framework.

Spring Boot uses custom JSON framework methods

Method 1

Method two

Experimental process

Experiment process 1:

Experiment process 2:

Experimental code

pom.xml

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.15</version>
    </dependency>

Method 1 App code

package my.spring.helloworld;

import java.util.List;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

@SpringBootApplication
public class App extends WebMvcConfigurerAdapter
{

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);

        /*
         * 1.Define convert to transform the message object;
         * 2.Add fastjson configuration information;
         * 3.Add configuration information to convert;
         * 4.Add convert to converters.
         */
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);

        converters.add(fastJsonHttpMessageConverter);
    }

    public static void main( String[] args )
    {
        SpringApplication.run(App.class, args);
    }
}

Method 2 App code

package my.spring.helloworld;

import java.util.List;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.web.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

@SpringBootApplication
public class App
{
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);

        HttpMessageConverter<?> converter = fastJsonHttpMessageConverter;
        return new HttpMessageConverters(converter);
    }

    public static void main( String[] args )
    {
        SpringApplication.run(App.class, args);
    }
}

GetJsonDemo class code

package my.spring.helloworld;

import java.util.Date;
import com.alibaba.fastjson.annotation.JSONField;

public class GetJsonDemo {
    private int id;
    private String name;
    @JSONField(format="yy-MM-dd HH:mm")
    private Date createTime;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Date getCreateTime() {
        return createTime;
    }
    public void setCreateTime(Date createTime) {
        this.createTime = createTime;
    }
}

MyController class code

    @RequestMapping("/getJsonDemoData")
    @ResponseBody
    public GetJsonDemo getDemo() {
        GetJsonDemo demo = new GetJsonDemo();
        demo.setId(1);
        demo.setName("JsonDemoData");
        demo.setCreateTime(new Date());
        return demo;
    }

experimental result