actual combat 23 —— 通过序列化对字典字段生成字典str字段和对应字典标签值

• 注解：@JsonSerialize(using = DictSerializer.class)

package com.zyjk.common.core.json;import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.BeanProperty;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
import com.zyjk.common.core.utils.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.zyjk.common.core.annotation.DictType;
import com.zyjk.common.core.utils.DictUtils;import java.io.IOException;
import java.util.Objects;public class DictSerializer extends JsonSerializer<Object> implements ContextualSerializer {private final Logger log = LoggerFactory.getLogger(DictSerializer.class);/*** 生成序列化字段后缀*/private static final String LABEL_SUFFIX = "Str";/*** 字典配置信息*/private DictType dictType;public DictSerializer() {super();}public DictSerializer(DictType dictType) {this.dictType = dictType;}@Overridepublic JsonSerializer<?> createContextual(SerializerProvider serializerProvider, BeanProperty property) throws JsonMappingException {DictType dictAnno = property.getAnnotation(DictType.class);return new DictSerializer(dictAnno);}@Overridepublic void serialize(Object value, JsonGenerator generator, SerializerProvider serializerProvider) throws IOException {serializerProvider.defaultSerializeValue(value, generator);String fieldName = generator.getOutputContext().getCurrentName();generator.writeStringField(fieldName.concat(LABEL_SUFFIX), value != null ? this.getDictLabel(dictType, value) : null);}/*** 获取字典信息** @param dictType 字典类型* @param value    字典值* @return 字典标签*/private String getDictLabel(DictType dictType, Object value) {try {String propertyValue = Objects.toString(value);if(StringUtils.isNotEmpty(dictType.readConverterExp())){return convertByExp(propertyValue,dictType.readConverterExp(),null);}String[] values = propertyValue.split(",");String label = null;for(String var : values){if (StringUtils.isNotEmpty(var)){if (label == null) {label = DictUtils.getDictLabel(dictType.value(), var);} else {label  += "," + DictUtils.getDictLabel(dictType.value(), var);}} else {if (label == null) {label = "";}}}return label;} catch (Exception e) {log.error("字典转换：获取字典描述异常,使用默认值：{}，key:{}, dict:{}, 异常：{}", dictType.defaultValue(), value, dictType.value(), e.getMessage());return dictType.defaultValue();}}/*** 解析导出值 0=男,1=女,2=未知** @param propertyValue 参数值* @param converterExp  翻译注解* @param separator     分隔符* @return 解析后值*/private String convertByExp(String propertyValue, String converterExp, String separator) {StringBuilder propertyString = new StringBuilder();String[] convertSource = converterExp.split(",");for (String item : convertSource) {String[] itemArray = item.split("=");if (StringUtils.isNotEmpty(separator) && StringUtils.containsAny(separator, propertyValue)) {for (String value : propertyValue.split(separator)) {if (itemArray[0].equals(value)) {propertyString.append(itemArray[1]).append(separator);break;}}} else {if (itemArray[0].equals(propertyValue)) {return itemArray[1];}}}return StringUtils.stripEnd(propertyString.toString(), separator);}
}

• 注解：@DictType

package com.zyjk.common.core.annotation;import java.lang.annotation.*;@Documented
@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface DictType {/** 字典类型 */String value() default "";/** 未查到字典值时的默认值 */String defaultValue() default "";/*** 读取内容转表达式 (如: 0=男,1=女,2=未知)*/String readConverterExp() default "";
}