SpringBoot ResponseBody返回值处理的实现

 @PostMapping(path = "/test", produces = MediaType.APPLICATION_JSON_VALUE) public Object test() { JSONObject jsonObject = new JSONObject(); jsonObject.put("test","test"); jsonObject.put("testnull",null); ApiResponseVo apiResponseVo = new ApiResponseVo(); apiResponseVo.setData(jsonObject ); apiResponseVo.setStatus(0); return apiResponseVo; }

 { "data": { "test": "test" }, "status": 0 } 

 import java.nio.charset.Charset; import java.util.ArrayList; import java.util.List; import org.springframework.context.annotation.Configuration; import org.springframework.http.MediaType; import org.springframework.http.converter.HttpMessageConverter; import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; import com.alibaba.fastjson.serializer.SerializerFeature; import com.alibaba.fastjson.support.config.FastJsonConfig; import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter; @Configuration public class fastJsonConfig extends WebMvcConfigurationSupport { @Override public void configureMessageConverters(List converters) { //创建fastJson消息转换器 FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter(); //创建配置类 FastJsonConfig fastJsonConfig = new FastJsonConfig(); //修改配置返回内容的过滤 fastJsonConfig.setSerializerFeatures( SerializerFeature.DisableCircularReferenceDetect, SerializerFeature.WriteMapNullValue, SerializerFeature.WriteNullStringAsEmpty ); fastConverter.setFastJsonConfig(fastJsonConfig); //将fastjson添加到视图消息转换器列表内 converters.add(fastConverter); } } 

 import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; @Target({ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME) public @interface Dict { String type(); } 

 import java.io.IOException; import java.lang.reflect.Field; import org.apache.commons.lang3.StringUtils; import org.springframework.context.annotation.Configuration; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.JsonSerializer; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.SerializerProvider; import lombok.extern.slf4j.Slf4j; @Slf4j @Configuration public class DictJsonSerializer extends JsonSerializer { @Override public void serialize(Object dictVal, JsonGenerator generator, SerializerProvider provider) throws IOException { ObjectMapper objectMapper = new ObjectMapper(); String currentName = generator.getOutputContext().getCurrentName(); try { // 1> 获取字段 Field field = generator.getCurrentValue().getClass().getDeclaredField(currentName); // 2> 获取字典注解 Dict dict = field.getDeclaredAnnotation(Dict.class); // 3> 判断是否添加了字典注解 if(dict == null) { objectMapper.writeValue(generator, dictVal); return; } // 4> 获取注解的type值 String type = dict.type(); // **************** 以下依据实际业务处理即可 ******************** // 5> 获取到字段的值 String val = dictVal == null ? "" : dictVal.toString(); String dictValName = ""; if(!StringUtils.isEmpty(val)) { // 6> 这里可以依据type做不同的处理逻辑 dictValName = "通过自己的方法,依据val获取到对应的字典值"; } // 7> 将字段改写为{"code":"code","name":"name"}格式 objectMapper.writeValue(generator, BaseEnum.builder().code(dictVal).name(dictValName.toString()).build()); } catch (NoSuchFieldException e) { log.error(e); } } }

 @SuppressWarnings("serial") @Builder @Getter @Setter @ToString @NoArgsConstructor @AllArgsConstructor public class BizRuleDto implements Serializable{ // 指定使用哪种序列化 @JsonSerialize(using = DictJsonSerializer.class) // 指定字典 (将被转换为{"code":"content","name":"contentname"}格式) @Dict(type = "content") private String content; }

 @Slf4j public class DictJsonSerializer extends JsonSerializer { // service private static ProductProxy productProxy; static { productProxy = SpringUtils.getBean(ProductProxy.class); } @Override public void serialize(Object dictVal, JsonGenerator generator, SerializerProvider provider) throws IOException { } } 

 import org.springframework.beans.BeansException; import org.springframework.context.ApplicationContext; import org.springframework.context.ApplicationContextAware; import org.springframework.stereotype.Component; @Component public class SpringUtils implements ApplicationContextAware { private static ApplicationContext ctx; /** * 获取bean */ @SuppressWarnings("unchecked") public static  T getBean(String id) { return (T) ctx.getBean(id); } /**<a style="color:transparent">来源gao($daima.com搞@代@#码(网</a> * 按类型获取bean */ public static  T getBean(Class clazz) { return ctx.getBean(clazz); } @Override public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { ctx = applicationContext; } }