spring boot之FastJson解析JSON数据

第一步：在pom中引入fastjson依赖：

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

第二部：配置FastJson（支持两种方法）

第一种方法：

1.启动类继承extends WebMvcConfigurationSupport

2.覆盖方法configureMessageConverters

package com.huawei;

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

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

/**
 * 使用SpringBootApplication指定一个spring boot的启动类
 * Hello world!
 *
 */
@SpringBootApplication
public class App extends WebMvcConfigurationSupport
{
    /**
     * 在main方法中启动我们的应用程序
     * @param args
     */
    public static void main( String[] args )
    {
        SpringApplication.run(App.class, args);
    }
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters)
    {
        /**
         * 1.需要先定义一个convert转换消息的对象
         * 2.添加fastjosn的配置信息，比如：是否需要格式化返回的json数据
         * 3.在convert中添加配置信息
         * 4.将convert添加到converters当中
         */
        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);

        /*设置编码格式，解决乱码问题*/
        List<MediaType> fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
        converters.add(fastJsonHttpMessageConverter);
    }

}

运行：

第二种方法：通过注解@Bean实现

package com.huawei;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;

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

/**
 * 使用SpringBootApplication指定一个spring boot的启动类
 * Hello world!
 *
 */
@SpringBootApplication
public class App
{
    /**
     * 在main方法中启动我们的应用程序
     * @param args
     */
    public static void main( String[] args )
    {
        SpringApplication.run(App.class, args);
    }

    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverter() {

        FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);

        /*设置编码格式，解决乱码问题*/
        List<MediaType> fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);

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

}

运行结果