按条件生成Bean

1.根据环境生成

 @Bean
    @Profile({ "dev", "test" }) // 设置 dev test 环境开启
    public PerformanceInterceptor performanceInterceptor() {

​    PerformanceInterceptor performanceInterceptor = new PerformanceInterceptor();
​    performanceInterceptor.setMaxTime(120000);
​    performanceInterceptor.setFormat(true);
​    return performanceInterceptor;
}

2.根据properties生成

3.根据class及bean生成

•  @Configuration("defaultFastjsonConfig")
   @ConditionalOnClass(com.alibaba.fastjson.JSON.class)
   @ConditionalOnMissingBean(FastJsonHttpMessageConverter.class)
   @ConditionalOnWebApplication
   public class DefaultFastjsonConfig {
   
   @Bean
   public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
       FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
       converter.setFastJsonConfig(fastjsonConfig());
       converter.setSupportedMediaTypes(getSupportedMediaType());
       return converter;
   }
   
   ​         /**
   
   ​        **    fastjson的配置
   ​         */
   public FastJsonConfig fastjsonConfig() {
   FastJsonConfig fastJsonConfig = new FastJsonConfig();
   fastJsonConfig.setSerializerFeatures(
   ​        SerializerFeature.PrettyFormat,
   ​        SerializerFeature.WriteMapNullValue,
   ​        SerializerFeature.WriteEnumUsingToString
   );
   fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
   ValueFilter valueFilter = new ValueFilter() {
   ​    public Object process(Object o, String s, Object o1) {
   ​        if (null == o1) {
   ​            o1 = "";
   ​        }
   ​        return o1;
   ​    }
   };
   fastJsonConfig.setCharset(Charset.forName("utf-8"));
   fastJsonConfig.setSerializeFilters(valueFilter);
   
   //解决Long转json精度丢失的问题
   SerializeConfig serializeConfig = SerializeConfig.globalInstance;
   serializeConfig.put(BigInteger.class, ToStringSerializer.instance);
   serializeConfig.put(Long.class, ToStringSerializer.instance);
   serializeConfig.put(Long.TYPE, ToStringSerializer.instance);
   fastJsonConfig.setSerializeConfig(serializeConfig);
   return fastJsonConfig;
   }
   
   /**
   
   - 支持的mediaType类型
     */
     public List<MediaType> getSupportedMediaType() {
     ArrayList<MediaType> mediaTypes = new ArrayList<>();
     mediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
     return mediaTypes;
     }