SpringBoot完美使用fastJson解析json数据

SpringBoot完美使用fastJson解析json数据（自动返回json数据）

springBoot框架自带集成jackson框架，返回对象自动转换成json数据格式，使用步骤如下

maven项目添加fastjsonjar包

<!-- 添加fastjson 依赖包. -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.15</version>
        </dependency>
    
  </dependencies>

方法一：App集成WebMvcConfigurerAdapter并且实现configureMessageConverters方法

package com.pypua;

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

import javax.security.auth.message.callback.PrivateKeyCallback.Request;

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.MediaType;
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;

/**
 * Hello world!
 *在这里我们使用@SpringBootApplication指定这是一个spring boot应用程序
 */
@SpringBootApplication
public class App extends WebMvcConfigurerAdapter
{
     /**
     * 利用fastjson替换掉jackson，且解决中文乱码问题
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        List<MediaType> fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
        converters.add(fastJsonHttpMessageConverter);
    }
    
    public static void main( String[] args )
    {
        //在main方法中启动应用程序
        SpringApplication.run(App.class,args);
    }
}

方法二：在App.java方法中注入方法Bean

package com.pypua;

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

import javax.security.auth.message.callback.PrivateKeyCallback.Request;

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.MediaType;
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;

/**
 * Hello world!
 *在这里我们使用@SpringBootApplication指定这是一个spring boot应用程序
 */
@SpringBootApplication
public class App
{
        @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        // 1、需要先定义一个 convert 转换消息的对象;
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        
        //2、添加fastJson 的配置信息，比如：是否要格式化返回的json数据;
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastJsonConfig.setCharset(Charset.forName("UTF-8"));
        //3、在convert中添加配置信息.
        fastConverter.setFastJsonConfig(fastJsonConfig);
        
        
        HttpMessageConverter<?> converter = fastConverter;
        return new HttpMessageConverters(converter);
    }
    public static void main( String[] args )
    {
        //在main方法中启动应用程序
        SpringApplication.run(App.class,args);
    }
}

 

个人建议推荐使用第一种方法，因为第二种注入方法bean的时候会出现中文乱码的问题