springboot：使用jackson convertor

<dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.31</version>
        </dependency>

package com.example.demo;

import java.util.List;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

@Configuration
public class MyWebmvcConfiguration implements WebMvcConfigurer{

    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        FastJsonHttpMessageConverter fjc = new FastJsonHttpMessageConverter();
        FastJsonConfig fj = new FastJsonConfig();
        fj.setSerializerFeatures(SerializerFeature.DisableCircularReferenceDetect);
        fjc.setFastJsonConfig(fj);
        converters.add(fjc);
    }

}

package com.example.demo;

import org.springframework.http.HttpInputMessage;
import org.springframework.http.HttpOutputMessage;
import org.springframework.http.MediaType;
import org.springframework.http.converter.AbstractHttpMessageConverter;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.http.converter.HttpMessageNotWritableException;
import org.springframework.util.StreamUtils;

import java.io.IOException;
import java.nio.charset.Charset;

public class MyMessageConverter extends AbstractHttpMessageConverter<UserEntity> {

    public MyMessageConverter() {
        // 新建一个我们自定义的媒体类型application/xxx-junlin
        super(new MediaType("application", "xxx-junlin", Charset.forName("UTF-8")));
    }

    @Override
    protected boolean supports(Class<?> clazz) {
        // 表明只处理UserEntity类型的参数。
        return UserEntity.class.isAssignableFrom(clazz);
    }

    /**
     * 重写readlntenal 方法，处理请求的数据。代码表明我们处理由“-”隔开的数据，并转成 UserEntity类型的对象。
     */
    @Override
    protected UserEntity readInternal(Class<? extends UserEntity> clazz,
            HttpInputMessage inputMessage) throws IOException,
            HttpMessageNotReadableException {
        String temp = StreamUtils.copyToString(inputMessage.getBody(), Charset.forName("UTF-8"));
        String[] tempArr = temp.split("-");

        return new UserEntity(tempArr[0],tempArr[1]);
    }

    /**
     * 重写writeInternal ，处理如何输出数据到response。
     */
    @Override
    protected void writeInternal(UserEntity userEntity,
            HttpOutputMessage outputMessage)
            throws IOException, HttpMessageNotWritableException {
        String out = "hello: " + userEntity.getName() + "-" + userEntity.getAddress();
        outputMessage.getBody().write(out.getBytes());
    }
}

package com.example.demo;

import java.util.List;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

@Configuration
public class MyWebmvcConfiguration implements WebMvcConfigurer{

    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        FastJsonHttpMessageConverter fjc = new FastJsonHttpMessageConverter();
        FastJsonConfig fj = new FastJsonConfig();
        fj.setSerializerFeatures(SerializerFeature.DisableCircularReferenceDetect);
        fjc.setFastJsonConfig(fj);
        converters.add(fjc);
        converters.add(converter());
    }
    @Bean
    public MyMessageConverter converter() {
        return new MyMessageConverter();
    }

}

package com.example.demo;

import java.util.ArrayList;
import java.util.List;

import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class UserController {

    @RequestMapping(value="/get",method=RequestMethod.GET)
    public Object getList(){
        List<UserEntity> list= new ArrayList<UserEntity>();
        UserEntity u1 = new UserEntity(null, "shanghai");
        list.add(u1);
        return list;
    }

    @RequestMapping(method = RequestMethod.POST, value = "/convert")
    public @ResponseBody UserEntity converter(@RequestBody UserEntity user) {
        return user;
    }
}

参考：www.cnblogs.com/hhhshct/p/9…